Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
BYUNG KOOG JANG Last modified date:2021.11.02

Professor / Optical and Electrical Materials / Department of Internationalization and Future Conception / Faculty of Engineering Sciences


Papers
1. B.K.Jang, J.H. Lee and Craig A.J. Fisher, Mechanical Properties and Phase Transformation Behavior of Carbon Nanotube-Reinforced Yttria-Stabilized Zirconia Composites, Ceramics International, 47, 35287-35293, 2021.10.
2. J.H. Lee, J.G. Li, B.N. Kim, Q.H. Meng, X.D. Sun and B.K. Jang, Effect of annealing on microstructure and luminescence characteristics in spark plasma sintered Ce3+-activated (Gd, Lu)3Al5O12 garnet ceramics, Journal of the European Ceramic Society, 41 , 1586-1592, 57(2020) 228〜234, 2021.07.
3. S.H. Kim, B.N. Kim, N. Nobuo, M. Yoshitaka and B.K. Jang, High temperature corrosion of spark plasma sintered Gd2SiO5 with volcanic ash for environmental barrier coatingscoatings, Journal of European Ceramic Society, 41, 3161-3166, 41 (2021) 3161-3166, 2021.06.
4. S.H. Kim, E.R. Baek and B.K. Jang, The effect of vanadium addition on the fracture and wear resistance of indefinite chilled cast iron, Materials Today Communications, 26, 101819, 26 (2021) 101819 (1-6)., 2021.06.
5. S.H. Kim, N. Nobuo, M. Yoshitaka, B.N. Kim and B.K. Jang, Corrosion behavior of calcium-magnesium-aluminosilicate (CMAS) on sintered Gd2SiO5 for environmental barrier coatings, Journal of the American Ceramic Society, 104, 3199-3129, 104 (2021) 3199-3129, 2021.06, The Gd2SiO5 performed high temperature corrosion behavior on calcium-magnesium- aluminosilicate (CMAS) for environmental barrier coatings (EBCs). The synthesized Gd2O3-SiO2 powder was prepared to fabricate a sintered Gd2SiO5 by spark plasma sintering (SPS) at 1400°C for 20 min. CMAS was sprinkled on the sintered Gd2SiO5 surface and exposed for 2, 12, and 48 h at 1400°C by isothermal heat treatment. The main corrosion factor is Ca, and Ca2Gd8(SiO4)6O2 phase is formed by reacting with Gd2SiO5. Extended morphology of Ca2Gd8(SiO4)6O2 particles observed in the reaction area become thicker as the heat treatment time increases as the CMAS is dissolved. According to the results of high-temperature X-ray diffraction (HT-XRD) and differential scanning calorimetry (DSC), CMAS melted at 1243°C or a higher temperature formed the reaction area. The Ca2Gd8(SiO4)6O2 phase was recrystallized and grown due to the reaction of Gd2SiO5 and Ca of the CMAS components..
6. J.H. Lee, B.N. Kim, and B.K. Jang, Fabrication of highly transparent Y2O3 ceramics by two-step spark plasma sintering, Journal of the American Ceramic Society, 104, in press,104 (2021), 2021.06.
7. A. Jeong, K. Suekuni, M. Ohtaki, and B.K. Jang, Thermoelectric properties of In- and Ga-doped spark plasma sintered ZnO ceramics, Ceramics International, 47, 23927-23934, in press,104 (2021), 2021.06.
8. J.H. Lee, B.N. Kim, S. Hata and B.K. Jang, Microstructural and spectroscopic analysis in non-uniform Y2O3 ceramics fabricated by spark plasma sintering, Journal of the Ceramic Society of Japan, 129, 1, 66-72, 129 [1] 66-72 2021, 2021.01.
9. S.H. Kim, Y. Matsushita and B.K. Jang,, Corrosion Behavior of Sintered YSZ with Volcanic Ash for Thermal Barrier Coatings, Material Science and Technology of Japan, 57, 6, 228-234, 41 (2021) 1586–1592, 2020.12.
10. B.K.Jang, N. Nagashima, S.W. Kim, Y.S. Oh, S.M. Lee, H.T. Kim, Mechanical properties and microstructure of Yb2SiO5 environmental barrier coatings under isothermal heat treatment
, Journal of the European Ceramic Society , 40, 2667-2673, 40 (2020) 2667-2673, 2020.06.
11. Y.H Han, R. Gao, I. Bajpai, B.N Kim, H. Yoshida, A. Nieto, H.W. Son, J.D. Yun, B.K. Jang, S. Jhung, Z. Jingming, KH. Hwang, F. Chen, J. F. Shackelford and S.Y Kim, Spark Plasma Sintered Bioceramics – From Transparent Hydroxyapatite to Graphene Nanocomposites, Advances in Applied Ceramics, 119, 2, 57-74, 119[2] (2020)57-74., 2020.05.
12. J.H.Lee, B.N.Kim and B.K. Jang, Non-uniform sintering behavior during spark plasma sintering of Y2O3, Ceramics International, 46, 4030-4034, Ceramics International, 46 (2020) 4030-4034, 2020.04, During spark plasma sintering of Y2O3 ceramics, the evolution of non-uniform microstructure was observed,
depending on the heating rate. At low heating rates, the appearance of the sintered bodies is relatively uniform,
and the grain size is slightly larger in the center than in the periphery. At high heating rates, however, the
sintered bodies are apparently non-uniform to reveal opaque center and translucent periphery, and a difference
in the grain size between the center and the periphery increases remarkably. The porosity and the pore size in
the center also increase with holding time. The evolution mechanism of the non-uniform microstructure is
explained by using a concept of dynamic grain growth and by assuming defect diffusion from the periphery to
the center under complicated electric and magnetic fields during spark plasma sintering..
13. B.K.Jang, N. Nagashima, S.W. Kim, Y.S. Oh, S.M. Lee, H.T. Kim, Mechanical properties and microstructure of Yb2SiO5 environmental barrier coatings under isothermal heat treatmen
, Journal of the European Ceramic Society , 40 (2020) 2667-2673, 2020.02, Yb2SiO5 (ytterbium monosilicate) top coatings and Si bond coat layer were deposited by air plasma spraymethod as a protection layer on SiC substrates for environmental barrier coatings (EBCs) application. TheYb2SiO5-coated specimens were subjected to isothermal heat treatment at 1400 °C on air for 0, 1, 10, and 50 h.The Yb2SiO5 phase of the top coat layer reacted with Si from the bonding layer and O2 from atmosphere formedto the Yb2Si2O7 phase upon heat treatment at 1400 °C. The oxygen penetrated into the cracks to form SiO2 phaseof thermally grown oxide (TGO) in the bond coat and the interface of specimens during heat treatment.Horizontal cracks were also observed, due to a mismatch of the coefficient of thermal expansion (CTE) betweenthe top coat and bond coat. The isothermal heat treatment improves the hardness and elastic modulus of Yb2SiO5coatings; however, these properties in the Si bond coat were a little bit decreased..
14. J.H.Lee, B.N.Kim and B.K. Jang, Non-uniform sintering behavior during spark plasma sintering of Y2O3”, Ceramics International, Ceramics International, 46, 4030-4034, 2019.12, During spark plasma sintering of Y2O3 ceramics, the evolution of non-uniform microstructure was observed, depending on the heating rate. At low heating rates, the appearance of the sintered bodies is relatively uniform, and the grain size is slightly larger in the center than in the periphery. At high heating rates, however, the sintered bodies are apparently non-uniform to reveal opaque center and translucent periphery, and a difference in the grain size between the center and the periphery increases remarkably. The porosity and the pore size in the center also increase with holding time. The evolution mechanism of the non-uniform microstructure is explained by using a concept of dynamic grain growth and by assuming defect diffusion from the periphery to the center under complicated electric and magnetic fields during spark plasma sintering..
15. J.H. Lee, Y.J. Lee, Y.H.Han, D.G.Shin, S.Y.Kim and B.K. Jang, Microstructural Studies of Core/Rim Structure of Polycarbosilane-Derived SiC Consolidated by Spark Plasma Sintering, Ceramics International, 45, 12406-12410, 45 (2019) 12406-12410, 2019.06.
16. J.H. Lee, Y.J. Lee, Y.H.Han, D.G.Shin, S.Y.Kim and B.K. Jang, Microstructural Studies of Core/Rim Structure of Polycarbosilane-Derived SiC Consolidated by Spark Plasma Sintering, Ceramics International, 45, 12406-12410, 2019.04, Recently, attempts have been made to use silicon carbide (SiC) ceramics as a fuel compact in nuclear reactors.
However, the use of sintering additives in the conventional sintering of SiC leads to a coarse microstructure with
high porosity and large grains due to the low sinterability and the large amount of grain boundaries or a second
phase, deteriorating the mechanical properties, and hence limiting widespread industrial applications. In this
study, polycarbosilane (PCS) and spark plasma sintering (SPS) as the SiC precursor and sintering method, respectively,
were applied to overcome the low sinterability and the use of sintering additives. As the raw material,
amorphous PCS was prepared by pyrolysis at 1000 °C. To decrease the particle size, pyrolyzed PCS powder was
subjected to ball milling by using high-energy ball milling. The ball-milled amorphous PCS powder was sintered
by SPS. Sintering was carried out at different temperatures (i.e., 1700, 1800, and 1900 °C) and pressures (i.e., 40
and 80 MPa). After SPS, the core/rim structure of the sintered pellet was formed on account of the oxygen
originating from the native oxide layer and free carbon in the PCS powder as the raw materials. In the core/rim
structure comprising the core, as well as the intermediate and rim regions, the microstructure and chemistry of
each region exhibited marginal difference with respect to the free carbon and oxygen. The phase fraction of α-
SiC increased from the rim region to core region due to the discrepancy of actual loaded pressure on account of
friction with the wall surface. The existing carbon was verified to be graphitized carbon. Owing to the short
reaction time, graphitization did not completely proceed, and deficient graphitization led to graphitized carbon
as not graphite. The introduced oxygen changed to amorphous SiO2, which was applied to the sintering-additivelike
liquid-phase sintering..
17. H.Elyas, T.W.Kim, B.K.Jang and K.S.Lee, Damage and Wear Resistance of Al2O3-SiC Microcomposites with Hard and Elastic Properties, Journal of the Ceramic Society of Japan, 126, 1, 21-26, 126[1] (2018) 21-26, 2018.06.
18. H.Elyas, T.W.Kim, B.K.Jang and K.S.Lee, Damage and Wear Resistance of Al2O3-SiC Microcomposites with Hard and Elastic Properties, Journal of the Ceramic Society of Japan, 126, 1, 21-26, 2018.04, Al2O3SiC
composites with different SiC contents of 010
wt% were fabricated and the effects on damage and
wear resistance investigated. The composites were fabricated using spark plasma sintering at 1600°C in a partial
vacuum (80MPa). Hertzian indentation evaluations using a spherical indenter indicated that the hardness of the
composite is improved by SiC addition. Wear resistance evaluated using the ball-on-disk method showed
enhanced wear resistance for the composites, even when SiC addition was less than 2wt%. Thus, Al2O3 ceramics
exhibited significantly improved damage and wear resistance, even though SiC addition was as small as 2 wt%..
19. .J.Lee, J.H. Lee, D.G.Shin, A. Noviyanto, H.M.Lee, T. Nishimura, B.K. Jang, W.T.Kwon, Y.H.Kim, S.Y.Kim, J.H.Lee, Y.H.Han, Phase Transformation on Spark Plasma Sintered Dense Polycarbosilane-derived SiC without Additive, Scripta Materialia, 143, 15, 188-190, 2018.04, SiC was sintered by spark plasma sintering (SPS) using polycarbosilane (PCS), and the effects of pressure on the
sintering behavior of SiC during SPS were investigated. The pressure conditions were set as 40 and 80 MPa, and
pyrolyzed PCS was used to induce reactive sintering during heat treatment such as pyrolysis, crystallization, and
crystal growth. According to the results, a high pressure accelerated the reactions in samples and resulted in a
high-density body consisting of small-sized grains; however, it induced a phase transition to the α phase,
which is stable at high temperatures..
20. B.K. Jang, S.W. Kim, Y.S. Oh and H.T. Kim, High Temperature Corrosion of ZrO2-4mol%Y2O3 Thermal Barrier Coatings with Volcanic Ash, Materials Science and Technology of Japan, 54, 4, 22-25, 2017.08.
21. .A Choi, J.M. Chae, S.W. Kim, S.M. Lee, Y.S. Han, H.T. Kim, B.K. Jang, and Y.S. Oh, Crystallization of a Glass with Yb2Si2O7-Al6Si2O13 Eutectic Composition and Eutectic Microstructure Formation, Materials Science and Technology of Japan , 50, 6, 465-471, 2017.08.
22. N. Kanno, B.K. Jang and S. Ueno, Crystallization of a Glass with Yb2Si2O7-Al6Si2O13 Eutectic Composition and Eutectic Microstructure Formation, Materials Science and Technology of Japan, 2017.08.
23. Y.S. Oh, S.W. Kim, S.M. Lee, H.T. Kim and B.K. Jang, Effect of the Coating Parameters on the Microstructure, Hardness and Thermal Conductivity of 8 wt% Y2O3-ZrO2 Thermal Barrier Coatings by Atmospheric Plasma Spray, Materials Science and Technology of Japan, 54, 4, 8-12, 2017.08.
24. B.K. Jang, F.J. Feng, K.Suzuta, H. Tanaka, Y. Matsushita, K.S.Lee, S.W. Kim, Y.S. Oh and H.T. Kim, Corrosion behavior of volcanic ash on sintered mullite for environmental barrier coatings, Ceramics International, 43, 2, 1880-1886, 2017.06, The high-temperature corrosion behavior of volcanic ash(VA) in attacking sintered mullite was investigated, and
the corrosion resistibility of mullite environmental barrier coatings (EBCs) to VA was predicted. Sintered
mullite specimens were prepared by using the spark plasma sintering method. These specimens were subjected
to a hot corrosive environment—molten Icelandic VA at 1400 °C—for three different duration times (2, 12, and
48 h). The microstructure and phase of the specimens were analyzed by using a scanning electron microscope
equipped with an accessory system for energy dispersive spectroscopy and X-ray diffraction. In addition, in-situ
high-temperature X-ray diffraction was carried out to identify the dynamics of phase evaluation in the volcanic
ash and mullite mixture powders. Results show that a reaction layer was generated and continuously dissolved
into the melted volcanic ash. The primary incursive component is iron; however, a minimal amount of sodium
plays a more important role in disintegrating sintered mullite..
25. T, Matsudaira, B.K. Jang, S.D. Kim and S.K. Woo, Effect of Water Vapor on Static Fatigue Behavior of Ni-YSZ Ceramics, Journal of the Ceramic Society of Japan, 125, 5, 1-3, 2017.05, The effect of water vapor on the mechanical properties of a porous nickel/yttria-stabilized zirconia (Ni-YSZ) composite (volume ratio of Ni:YSZ = 40:60) was evaluated at 850°C, a typical operating temperature of a reversible solid oxide cell. Both the flexural strength and static fatigue limit of Ni-YSZ obtained from the static fatigue lifetime under a wet atmosphere (containing 4% H2O) were lower than those under a dry atmosphere. This can be explained by absorption of H2O molecules into YSZ particles, resulting in accelerated crack growth. The fatigue limit of Ni-YSZ was confirmed to be extremely low, corresponding to almost one-third of the flexural strength..
26. B.K. Jang, F.J. Feng, K. Suzuta, H. Tanaka,Y. Matsushita, K.S. Lee, and S. Ueno, Corrosion Behavior of Volcanic Ash and CMAS on Yb2SiO5 Environmental Barrier Coatings, Journal of the Ceramic Society of Japan, 2017.04, High-temperature corrosion behavior of volcanic ash and artificial calcium-magnesium-aluminosilicate (CMAS) on sintered ytterbium monosilicate (Yb2SiO5), and the corrosion resistance of Yb2SiO5 as an environmental barrier coating (EBC), are investigated. Dense sintered Yb2SiO5 specimens were prepared using the spark plasma sintering method at 1400 °C for 10 min. These specimens were subjected to a hot corrosive environment of molten Iceland volcanic ash and CMAS at 1400 °C for 2 hr, 12 hr, and 48 hr. Different corrosion phenomena, i.e., continuous reaction with CMAS and weak reaction with the volcanic ash, were observed. From the results of in-situ high temperature XRD measurement and SEM-EDS studies, Yb2SiO5 exhibits excellent resistance to volcanic ash but lacks resistance to CMAS attack..
27. B.K. Jang, S.W. Kim, Y.S. Oh, S.M. Lee and H.T. Kim, Degradation of EB-PVD ZrO2-4mol%Y2O3 thermal barrier coatings by volcanic ash deposits, Journal of the Ceramic Society of Japan, 124, 9, 886-889, 2016.09, This work describes the degradation of ZrO24 mol%Y2O3 (YSZ) coatings obtained by EB-PVD. YSZ coatings were exposed at 1200°C for 10 min~50hr by isothermal heat treatment in the presence of an erosive impurity of volcanic ash. At the interface between the YSZ coatings and volcanic ash, the coatings were partially dissolved in the volcanic ash, resulting in the degradation of coatings by the formation of the reacted region. A ZrSiO4 or glassy phase is formed by the chemical reaction between YSZ coatings and volcanic ash at 1200°C..
28. S. Ueno, Y. Suzuki, Y. Furukawa, T. Tada, N. Kannno and B.K. Jang, Crystallization of Glass with Y2Si2O7-Mullite Eutectic Composition, Journal of the Ceramic Society of Japan, 124, 8, 796-799, 2016.08, In this paper, the crystallization of the glass with Y2Si2O7-mullite eutectic composition was examined. A dendrite Y2Si2O7 crystalline grows from the surface of the glass bulk at 1302 K. A competitive growth of Y2Si2O7 phase and mullite phase occurs at 1430 K. The activation energy for the competitive growth can be estimated to 329 kJ/mol. The activation energy for the crystallization of hypoeutectic and hypereutectic composition increases with increasing the amount of the primary phase..
29. S. Ueno, K.Seya, Y. Furukawa., T. Nishimura, B.K. Jang, Fabrication of Oxide Eutectic Environmental Barrier Coating without Boundary Glassy Phase, Materials Science and Technology of Japan, 53, 2, 30-33, 2016.08.
30. F.J. Feng, B.K. Jang J.Y. Park and K. S. Lee, Effect of Yb2SiO5 addition on the physical and mechanical properties of sintered mullite ceramic as an environmental barrier coating material, Ceramics International, 42, 15203-15208, 2016.07, In this tudy, ytterbium monosilicate(Yb2SiO5)-added sintered mullite ceramics are prepared as candidate materials for environmental barrier coatings(EBCs).The effect of adding Y b2SiO5 on the physical and mechanical properties of the sintered mullite ceramics is investigated. TheYb2O3–SiO2–Al2O3 ternary phase diagram indicates that adding Yb2SiO5 to the mullite goes beyond imply mixing; Instead, liquid sintering occurs. Therefore, when we add Yb2SiO5 to the mullite, the sintered body possesses a denser microstructure and faster densification rate than does pure mullite..
31. K.J. Kim, S.H. Jang, Y.W.Kim, B.K. Jang and T. Nishimura, Conductive SiC Ceramics Fabricated by Spark Plasma Sintering, Cearmics International, 42, 17892-17896, 2016.07, Recently, the development of electrically conductive SiC have received a large attention because the electrical conductivity of SiC can be improved by microstructural control due to incorporation of electrical dopants (ex, CNTs, graphene), sintering atmosphere and sintering additives. In present work, we examined the thermal-electrical properties of SiC ceramics. For micorstructural control of SiC ceramics, Y2O3 was used for sintering additive and addition of Y2O3 is the range of 0.05~0.005wt%. Sintered SiC samples were fabricated by spark plasma sintering (SPS) at 1950C, pressure of 60MPa in N2 atmosphere. Thermal conductivity of SiC was increased with increasing of Y2O3 addition. The effect of Y2O3 on mechanical, electrical properties of SiC was investigated..
32. S. Ueno, T. Tada, Y. Suzuki, J. Nozawa, B.K. Jang and T. Sekino, Crystallization and Microstructure Formation of Glass with Y2Si2O7-Mullite Eutectic Composition, Ceramics International, 42, 13601-13604, 2016.07, The crystallization and microstructure formation of glass with a Y2Si2O7-mullite eutectic composition were examined. A crystallization of Y2Si2O7 and the mullite phase due to phase separation occurred at 1174°C, and a well-developed Y2Si2O7 facet crystal was formed. This sample was melted down and solidified via heat treatment at 1250 °C and 1300 °C, temperatures below the melting point of a Y2Si2O7 mullite eutectic..
33. S.J.Kim, S.M. Lee, Y.S. Oh, H.T. Kim B.K.Jang and S.W. Kim, Phase Formation and Thermal Diffusivity of Thermal Barrier Coatings of La₂Zr₂O7, (La0.5Gd0.5)₂Zr₂O7, Gd₂Zr₂O7 Fabricated by Suspension Plasma Spray, Journal of the Korean Institute of Surface Engineering, 49, 6, 604-611, 2016.06.
34. S Ueno, K. Seya and B.K.Jang, Fabrication of EBC System with Oxide Eutectic Structure, Ceramic Transactions, 256, 65-72, 2016.06.
35. B.K. Jang, F.J. Feng, K.S. Lee, E. Garcia, A. Nistal, N.Nagashima, S.W. Kim, Y.S. Oh and H.T. Kim, Thermal behavior and mechanical properties of Y2SiO5 environmental barrier coatings after isothermal heat treatment, Surface & Coatings Technology, 308, 24-30, 2016.06, Y2SiO5 coatings are deposited by a flame-spray technique as protection layer on SiC substrates to prevent oxidation
and steam corrosion. In this research, Y2SiO5 coatings were isothermally heat treated at different temperatures
and different exposure times in a laboratory environment. The thermal behaviors such as phase
transformation, microstructural change and thermally grown oxide (TGO) formation have been examined by
XRD, SEM, and EDS analysis. Different modes of TGO growth behavior were found at different temperatures. In
addition, the mechanical properties were evaluated by a Martens hardness tester. The results show that the
change of microstructure and composition is not too critical, but higher temperatures and longer heating times
do lead to the formation of Y2SiO5 crystalline phases and a β-Y2O3 phase. Thus, the isothermal heat treatment
improves the hardness and elastic modulus of Y2SiO5 coatings..
36. S.J.Kim, S.M.Lee, Y.S. Oh and H.T. Kim, B.K. Jang and S.W. Kim, Characteristics of Bulk and Coating in Gd2-xZr2+xO7+0.5x(x= 0.0, 0.5, 1.0) System for Thermal Barrier Coatings, Journal of the Korean Ceramic Society, 53, 6, 652-658, 2016.05.
37. Y. Furukawa, T. Yanai, K. Seya, B.K. Jang and S. Ueno, Chemical Reactions between SiC and ZrO2 at Ultra-high Temperatures and Formation of EBC Layer by Solidification Process, Materials Science and Technology of Japan, 2016.05.
38. K.Seya, S. Ueno, T. Nishimura and B.K. Jang, Consideration of the Formation Mechanism of an Al2O3-HfO2 Eutectic Film on a SiC Substrate, Journal of the Korean Physical Society, 68, 1, 73-76, 2016.01.
39. K.Seya, B.K. Jang and S. Ueno, Preparation of Environmental Barrier Coating with Al2O3-HfO2 Eutectic Structure by Optical Zone Melting Method, Materials Science and Technology of Japan, 52, 31-35, 2015.10.
40. I.Bajpai, D.Y. Kim, Y.H. Han, B.K.Jang and S.Y Kim, Directional Property Evaluation of Spark Plasma Sintered GNPs-Reinforced Hydroxyapatite Composite, Materials Letters, 158, 62-65, 2015.09, Graphene nanoplatelets(GNPs)-reinforcedhydroxyapatitecompositeswereanalyzedintwodirections
of theappliedpressure(perpendicularandparallel).Platelet-shapedporeswereobservedinthecross-
section normaltotheappliedpressure,whereaselongatedorbuttonholetypeporesaroundthe
agglomeratedGNPswerefoundintheparallelcross-section.Thenormalcross-sectionofthecomposite
showedlowerhardnessandhigherintensityofXRDpeakof(002)planethantheparallelcross-section..
41. K.Seya, S. Ueno and B.K. Jang, Formation of Al2O3-HfO2 Eutectic EBC Film on Silicon Carbide Substrate, Journal of Nanomaterials, 1-8, 2015.08, The formation mechanism of Al2O3-HfO2 eutectic structure, the preparation method, and the formation mechanism of the eutectic EBC layer on the silicon carbide substrate are summarized. Al2O3-HfO2 eutectic EBC film is prepared by optical zone melting method on the silicon carbide substrate. At high temperature, a small amount of silicon carbide decomposed into silicon and carbon. The components of Al2O3 and HfO2 in molten phase also react with the free carbon. The Al2O3 phase reacts with free carbon and vapor species of AlO phase is formed. The composition of the molten phase becomes HfO2 rich from the eutectic composition. HfO2 phase also reacts with the free carbon and HfC phase is formed on the silicon carbide substrate; then a high density intermediate layer is formed..
42. C.S.Kwon, S.M. Lee, Y.S. Oh, H.T. Kim B.K.Jang and S.W. Kim, Fabrication and Characterization of Ceramics and Thermal Barrier Coatings of Lanthanum Zirconate with Reduced Rare-earth Contents in the La2O3-ZrO2 System, Journal of Korean Powder Metallurgy Institute, 22, 6, 413-419, 2015.06.
43. C.S.Kwon, S.M. Lee, Y.S. Oh, H.T. Kim B.K.Jang and S.W. Kim, Fabrication and Characterization of La2Zr2O7/YSZ Double-Ceramic-Layer Thermal Barrier Coatings Fabricated by Suspension Plasma Spray, Journal of the Korean Institute of Surface Engineering, 48, 6, 315-321, 2015.06.
44. B.K.Jang, J.G. Sun, S.W. Kim, Y.S. Oh, S.M. Lee and H.T. Kim, Thermal Conductivity of ZrO2-4mol%Y2O3 Thin Coatings by Pulsed Thermal Imaging Method, Surface and Coatings Technology, 284, 57-62, 2015.05, Thin ZrO2-4 mol% Y2O3 coatings were deposited onto ZrO2 substrates by electron beam-physical vapor deposition.
The coated samples revealed a feather-like columnar microstructure. The main phase of the ZrO2-4 mol%
Y2O3 coatings was the tetragonal phase. To evaluate the influence of the coating's thickness on the thermal conductivity
of thin ZrO2-4 mol% Y2O3 coatings, the pulsed thermal imaging method was employed to obtain the
thermal conductivity of the coating layer in the two-layer (coating and substrate) samples with thickness between
56 and 337 μm. The thermal conductivity of the coating layer was successfully evaluated and compared
well with those obtained by the laser flash method for similar coatings. The thermal conductivity of coatings
shows an increasing tendency with an increase in the coating's thickness..
45. S.W. Kim, J.M.Chae, S.M. Lee, Y.S. Oh, H.T. Kim and B.K.Jang, Transmission Electron Microscopy Investigation of Hot-pressed ZrB2-SiC with B4C additive, Journal of the Korean Ceramic Society, 52, 6, 462-466, 2015.05.
46. K.Seya, B.K. Jang and S. Ueno, Microstructure Formation of Al2O3-HfO2 Eutectic, Journal of the Ceramic Society of Japan, 123, 5, 433-436, 2015.05, The microstructure formation of Al2O3HfO2 eutectic prepared by unidirectional solidification and rapid solidification was examined. The microstructure of the Al2O3HfO2 eutectic samples showed lamellar structure and the relationship between the inter-lamellar spacing and solidification rate R can be expressed by 2R=constant. A small amount of tetragonal HfO2 phase exists in the sample prepared by rapid solidification. Only monoclinic HfO2 phase can be found in the eutectic samples prepared by unidirectional solidification. A tensile stress was induced in Al2O3 phase during the cooling step due to the transformation of HfO2 from tetragonal to monoclinic phase..
47. C.Y. Park, Y.H. Yang, S.W. Kim, S.M. Lee, H.T. Kim, B.K. Jang, D.S. Lim, and Y.S. Oh, Effect of La2O3 Addition on Interface Chemistry Between 4YSZ Top Layer and Ni Based Alloy Bond Coat in Thermal Barrier Coating by EB PVD, J. Nanoscience and Nanotechnology, 14, 11, 8659-8664, 2014.11, The effect of a 5 mol% La2O3 addition on the forming behavior and compositional variation at interface
between a 4 mol% Yttria (Y2O3) stabilized ZrO2 (4YSZ) top coat and bond coat (NiCrAlY)
as a thermal barrier coating (TBC) has been investigated. Top coats were deposited by electron
beam physical vapor deposition (EB PVD) onto a super alloy (Ni Cr Co Al) substrate without
pre-oxidation of the bond coat. Top coats are found to consist of dense columnar grains with a
thin interdiffusion layer between metallic bond coat..
48. D.Y. Kim, Y.H. Han, J.H.Lee, I.K. Kang, B.K.Jang and S.Y Kim, Characterization of Multi-walled Carbon Nanotube Reinforced Hydroxyapatite Composites Consolidated by Spark Plasma Sintering, BioMed Research International, 1-10, 2014.11, Pure HA and 1, 3, 5, and 10 vol% multiwalled carbon nanotube- (MWNT-) reinforced hydroxyapatite (HA) were consolidated using a spark plasma sintering (SPS) technique.The relative density of pure HA increased with increasing sintering temperature, but that of theMWNT/HA composite reached almost full density at 900∘C, and then decreased with further increases in sintering temperature. The relative density of the MWNT/HA composites increased with increasing MWNT content due to the excellent thermal conductivity of MWNTs. The grain size of MWNT/HA composites decreased with increasing MWNT content and increased with increasing sintering temperature..
49. S.W. Myoung, Z. Lu, Y.G. Jung, B.K. Jang, U.G Paik, Control of Bond Coat Microstructure in HVOF Process for Thermal Barrier Coatings, Surface & Coatings Technology, 260, 63-67, 2014.08, The microstructure of bond coat was optimized by controlling coating parameters, such as spray distances, the
gas flow ratio of air/oxygen/hydrogen, gun speed, and step distance, in high-velocity oxy-fuel process, and the
effects of coating parameters on the microstructure and thermomechanical properties were investigated.
When the spray distance to the substrate shortened, the microstructure became dense and the hardness values
were increased. As the amount of hydrogen increased in the fixed gas flow ratio, defects such as global pores and
oxides were increased and the hardness valueswere decreased, showing a similar trend in oxygen..
50. C.Y. Park, S.M. Lee, S.W. Kim, H.T. Kim, B.K.Jang, Y.S. Oh, Effects of N2/Ar Gas Ratio on Phase Formation and Tribology of Ti-Si-N Composite Coatings Prepared by Hybrid PVD, Journal of the Ceramic Society of Japan, 122, 8, 638-641, 2014.08, TiSiN hard coatings have been fabricated at different N2/Ar gas ratio (N2:Ar = 1:1, 1:2, or 1:3) sputtering conditions by the hybrid Physical Vapor Deposition (PVD) method, which consists of sputtering and arc ion plating (AIP). The pure silicon and titanium targets were selected for reactive sputtering and the AIP process, respectively. Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray Spectroscopy (EDS) analysis has shown that the Ti/Si ratio increased as the Ar gas flow rate increased. Moreover, it found that the main growth plane of TiSiN film was changed from (111) plane to (220) plane with increasing Ar gas flow from the results of X-ray diffraction (XRD) analysis..
51. S.W. Myoung, Z. Lu, Y.G. Jung, B. K. Jang, Y.S. Yoo, S.M. Seo, B.G. Choi and C. Y. Jo, Effect of Plasma Pre-treatment on Thermal Eurability of Thermal Barrier Coatings in Cyclic Thermal Exposure, Advances in Materials Science and Engineering, 1-8, 2014.06, Plasma pretreatment on the top and bond coats was performed and its influence on the thermal durability of thermal barrier coating (TBC) system was investigated through cyclic thermal exposure. Two types of bond coat were prepared by different methods, namely, air plasma spray (APS) and high-velocity oxy-fuel (HVOF), and two kinds of feedstock powder were employed for preparing the top coat in APS process. The better thermal durability was achieved in the vertically cracked TBC with the surface modified bond coat or with the bond coat prepared by APS process. .
52. I.S. Han, D.W. Seo, S.Y. Kim, S.K. Woo, H.J. Lee and B.K. Jang, Performance-Properties and Fabrication of the Reaction Sintered Si/SiC Honeycomb Materials for Solar Absorber Application, J Journal of the Ceramic Society of Japan, 122, 6, 502-508, 2014.06, Reaction sintered Si/SiC composite was fabricated to apply to a solar absorber and the fabricated material was evaluated on its basic properties and performance. SiC and carbon black were mixed to shape a honeycomb with a multi-channel via vacuum extrusion process. The Si/SiC honeycomb material was also fabricated with less than 5% of pores by molten silicon infiltration in vacuum. The sintered density and porosity of the fabricated material, and the 3-point bending strength at room temperature and high temperature (11001300°C) were measured and the thermal conductivity at room temperature and 1100°C were also analyzed..
53. S. Rawati, B.K. Jang, P. Mohapatra and K. Balani, Toughening by Carbon Nanotube Reinforcement in 3mol% Yttria-Stabilized Zirconia, Materials Science and Technology of Japan, 51, 2, 23-27, 2014.02.
54. S.W. Kim, J.M. Chae, S.M. Lee, Y.S.Oh, H.T.Kim, B.K.Jang, Change in Microstructures and Physical Properties of ZrB2-SiC Ceramics Hot-Pressed with a Variety of SiC Sources, Ceramics International, 40, 2, 3477-3483, 2014.02, This paper reviewed briefly the thermal conductivities of ZrB2-based ultra-high temperature ceramics. As aerodynamic system, such as hypersonic plane, needs sharp leading edges to enhance vehicle maneuverability during atmosphere exit and re-entry, the thermal conductive properties of thermal protection system becomes more important. ZrB2 is one of the candidates for TPS application to ultra-high temperature environments over 2000C. One example of ZrB2-SiC ceramics with enhanced thermal conductivity was also introduced.
.
55. X. H. Nguyen, I.K. Kim, B. K. Jang and Y.S. Oh, Effect of Carbon Content on the Tribological Behavior of TiCxN1-x Films Prepared by Arc-Vapor Deposition, Journal of the Ceramic Society of Japan, 121, 12, 961-967, 2013.12.
56. K.S. Lee, B.K.Jang and Y.Sakka, Damage and Wear Resistance of Al2O3-CNT Nanocomposites Fabricated by Spark Plasma Sintering, Journal of the Ceramic Society of Japan, 121, 10, 867-872, 2013.10.
57. G. Suarez, B.K. Jang, E. Aglietti, and Y. Sakka, Fabrication of dense ZrO2/CNT composites: Influence of Bead-Milling Treatment, Metallurgical and Materials Transactions A, 44, 4374-4381, 2013.08.
58. W.J.Lee, B.K. Jang, D.S. Lim, Y.S. Oh, S.W. Kim, H.T. Kim, H. Araki, H. Murakami, S. Kuroda, Hot Corrosion Behavior of Plasma Sprayed 4 mol% Y2O3- ZrO2 Thermal Barrier Coatings with Volcanic Ash, Journal of the Korean Ceramic Society, 50, 6, 353-358, 2013.06.
59. C.Y Park, Y.H Yang, S.W. Kim, S.M Lee, H.T Kim, D.S. Lim, B.K. Jang and Y.S. Oh, Thermal Durability of 4YSZ Thermal Barrier Coating Deposited by Electron Beam PVD, Journal of Korean Powder Metallurgy Institute, 20, 6, 460-466, 2013.06.
60. B.K. Jang, S.W. Kim, Y.S. Oh, H.T. Kim, Y. Sakka and H. Murakami, Effect of Gd2O3 on Thermal Conductivity of ZrO2-4mol%Y2O3 Ceramics Fabricated by Spark Plasma Sintering, Scripta Materialia, 69, 165-170, 2013.05.
61. D.M.Kim, S.M.Lee, I.K.Kim, B.K.Jang, D.S. Lim and Y.S.Oh, Plasma Resistance of Y2O3 Nanofilms on Quartz with Different Interlayers Deposited by EB PVD, Journal of the Ceramic Society of Japan, 120, 11, 539-543, 2012.11.
62. B.K.Jang, J.G. Sun, S.W. Kim, Y.S. Oh and H.T. Kim, Characterization of the Thermal Conductivity of EB-PVD ZrO2- Y2O3 Coatings With a Pulsed Thermal Imaging Method, Surface and Coatings Technology, 207, 177-181, 2012.07.
63. C.S. Kwon, S.M. Lee, Y.S. Oh, H.T. Kim, B.K. Jang, and S.W. Kim, Phase Evolution and Thermal Conductivities of (La1-xGdx)2Zr2O7 Oxides for Thermal Barrier Coatings, Journal of Korean Powder Metallurgy Institute, 19, 6, 429-434, 2012.06.
64. S.W. Kim, B.K. Jang, Y.S. Oh, S.M. Lee, H.T. Kim, Y. Sakka, Thermal Conductivities of ZrB2-based Ceramics for Ultra-High Temperature Applications, Materials Intergration, 25, 2, 23-27, 2012.02.
65. B.K. Jang, S.W. Kim, Y.S.Oh, H.T. Kim, Y. Sakka and H. Murakami, Influence of La2O3 Addition on Thermophysical Properties of ZrO2-4mol%Y2O3 Ceramics Fabricated by Spark Plasma Sintering, Journal of the Ceramic Society of Japan,, 119, 12, 929-932, 2011.12.
66. K.H. Kwak, B.C. Shim, S.M. Lee, Y.S. Oh, H.T. Kim, B.K. Jang and S.W. Kim, Formation and Thermal Properties of Fluorite-Pyrochlore Dual Structure in La2(ZrxCe1-x)2O7 Oxide System, Materials Letters, 65, 19-20, 2937-2940, 2011.11.
67. Y.J. Oh, B.K. Jang, and H.O.Kim, Influence of Moisture Contamination of Lead-Free Transparent Dielectric Slurry for Tape Casting , Materials Letters, 65, 15-16, 2357-2360, 2011.11.
68. B.K. Jang, Y. Sakka, N. Yamaguchi, H. Matsubara and H.T. Kim, Thermal Conductivity of EB-PVD ZrO2-4 mol% Y2O3 Films using the Laser Flash Method, Journal of Alloys and Compounds, 509, 3, 1045-1049, 2011.04.
69. B.K.Jang, K. Tsuda, and Y. Sakka, Alignment of Carbon Nanofibers in the Al2O3 Matrix under a Magnetic Field, Materials Transactions, 52, 3, 572-575, 2011.03.
70. H.O. Kim, B.K. Jang, D.S. Lim and Y. J. Oh, Characteristics of Lead-Free Transparent Dielectrics Contaminated with Moisture, Materials Chemistry and Physics, 129, 1-2, 134-137, 2011.02.
71. B.K. Jang, S.Y. Kim, I.S. Han, Doo-Won Seo, K.S. Hong, S.K. Woo, Y. Sakka, Influence of Uni and Bi-modal SiC Composition on Mechanical Properties and Microstructure of Reaction-Bonded SiC Ceramics, Journal of the Ceramic Society of Japan, 118[11] (2010)1028-1031, 2010.11.
72. C.F Hu,, Y. Sakka, B.K. Jang, H. Tanaka, T. Nishimura, S, Guo and S. Grasso, Microstructure and Properties of ZrB2-SiC and HfB2-SiC Composites Fabricated by Spark Plasma Sintering (SPS) using TaSi2 as Sintering Aid, Journal of the Ceramic Society of Japan, 118 [11] (2010) 997-1001, 2010.11.
73. S.Y Kim, S.K. Woo, I.S. Han, D.W. Seo, B.K. Jang, Y. Sakka, The Carbon Black Effect on Crack Formation during Pyrolysis Step in Liquid Silicon Infiltration Process for Cf/C-SiC Composites, Journal of the Ceramic Society of Japan, 118 [11] (2010) 1075-1078, 2010.10.
74. C. F. Hu, Y. Sakka, T. Uchikoshi, T. S. Suzuki, B.K.Jang, S. Grasso and G. Suarez, Synthesis, Microstructure and Mechanical Properties of ZrB2 Ceramic Prepared by Mechanical Alloying and Spark
Plasma Sintering
, Key Engineering Materials, 434-435 (2010) 165-168, 2010.07.
75. B.K.Jang and Y. Sakka, Dispersion and Shortening of Multi-Walled Carbon Nanotubes by Size Modification, Materials Transactions, 51[1] (2010) 192-195, 2010.07.
76. B.K. Jang, Y. Sakka, H, Matsubara and H.T.Kim, Thermal Conductivity and Microstructure of Nano-Porous Zirconia Coatings Fabricated by Electron Beam PVD, Materials Science and Technology of Japan, 47 [5] (2010) 32-39, 2010.05.
77. B.C.Shim, K.H.Kwak, S.M.Lee, Y.S.Oh, H.Y.Kim, B.K. Jang and S.W.Kim, Phase Evolution and Thermo-Physical Properties of Rare-earth Oxides for Thermal Barrier Systems, Journal of Korean Powder Metallurgy Institute, 17[2] (2010) 148-153, 2010.02.
78. S.W. Park, B.K.Jang and Y.J.Oh, Structural Control of Ambient Drying Silica Aerogel by Drying Control Chemical Additive, Journal of the Japan Institute of Metals and Materials, 73 [8] (2009) 608-612, 2009.07.
79. B.K. Jang, Y. Sakka and H. Matsubara, Young’s Modulus and Thermal Conductivity of Nanoporous YSZ Coatings Fabricated by EB-PVD, Advanced Ceramic Coatings and Interfaces III, Ceramics Engineering and Science proceedings, 29 [4] (2008) 137-146, 2008.04.
80. B.K.Jang and Y. Sakka, Thermophysical Properties of Porous SiC Ceramics Fabricated by Pressureless Sintering, Science and Technology of Advanced Materials, 8 (2007) 655-659, 2007.08.
81. B.K.Jang, Influence of Low Indentation Load on Young’s Modulus and Hardness of 4 mol% Y2O3-ZrO2 by Nanoindentation, Journal of Alloys and Compounds, 426 [1-2] (2006) 312-315, 2007.03.
82. B.K.Jang and H. Matsubara, Influence of Porosity on Thermophysical Properties of Nano-Porous Zirconia Coatings Grown by Electron Beam-Physical Vapor Deposition, Scripta Materialia, 54 [9] (2006) 1655-1659, 2006.09.
83. B.K.Jang and H. Matsubara, Microstructure of Nanoporous Yttria-Stabilized Zirconia Films Fabricated by EB-PVD, Journal of the European Ceramic Society, 26 [9] (2006) 1585-1590, 2006.09.
84. B.K.Jang and H. Matsubara, Surface Roughness and Microstructure of Yttria Stabilized Zirconia EB-PVD Coatings, Surface & Coatings Technology, 200 [14-15] (2006) 4594-4600, 2006.07.
85. T. H. Shin, J. H. Yu, S.W. Lee, I. S. Han, S. K. Woo, B.K. Jang and S.H. Hyun, Deposition Behavior of YSZ Nano-Coating Layer by EB-PVD, Key Engineering Materials, 317-318 (2006) 505-508, 2006.07.
86. T. H. Shin, J. H. Yu, S.W. Lee, I. S. Han, S. K. Woo, B.K. Jang and S.H. Hyun, Preparation of YSZ Electrolyte for SOFC by Electron Beam PVD, Key Engineering Materials, 317-318 (2006) 913-916, 2006.07.
87. T. Nishiwaki, H.Mihashi, B.K.Jang and K. Miura, Development of Self-healing System for Concrete with Selective Heating around Crack, Journal of Advanced Concrete Technology, 4[2] (2006) 267-275, 2006.07.
88. B.K.Jang and T. Kishi, Mechanical Properties of TiNi Fiber Impregnated CFRP Composites” Materials Letters, Materials Letters, 60 [4] (2006) 518-521, 2006.07.
89. B.K.Jang and H. Matsubara, Thermophysical Properties of EB-PVD Coatings and Sintered Ceramics of 4mol% Y2O3-Stabilized Zirconia, Journal of Alloys and Compounds, 419 [1-2] (2006) 243-246, 2006.03.
90. B.K.Jang and H. Matsubara, Thermophysical Properties of EB-PVD Coatings and Sintered Ceramics of 4mol% Y2O3-Stabilized Zirconia, Journal of Alloys and Compounds, 419 [1-2] (2006) 243-246, 2006.02.
91. B.K.Jang and T. Kishi, Influence of Stacking Angle of Carbon Fibers on Fracture Behavior of TiNi Fiber Impregnated CFRP Composites, Journal of Alloys and Compounds, 419 [1-2] (2006) 208-212, 2006.02.
92. B.K.Jang and H. Matsubara, Hardness and Young’s Modulus of Nano Porous EB-PVD YSZ Coatings by Nanoindentation, Journal of Alloys and Compounds, 402 [1-2] (2005) 237-241, 2005.07.
93. B.K.Jang and H. Matsubara, Influence of Porosity on Hardness and Young’s Modulus of Nanoporous EB-PVD TBCs by Nanoindentation, Materials Letters, 59 [27] (2005) 3462-3466, 2005.07.
94. B.K.Jang, Microstructure of Nano SiC Dispersed Al2O3-ZrO2 Composites, Materials Chemistry and Physics, 93 [2-3] (2005) 337-341, 2005.07.
95. B.K.Jang and T. Kishi, Thermomechanical Response of TiNi Fiber-Impregnated CFRP Composites, Materials Letters, 59 [19-20] (2005) 2472-2475, 2005.07.
96. B.K.Jang and T. Kishi, Adhesive Strength between TiNi Fibers Embedded in CFRP Composites, Materials Letters, 59 [11] (2005) 1338-1341, 2005.07.
97. B.K.Jang and H. Matsubara, Influence of Rotation Speed on Microstructure and Thermal Conductivity of Nano-Porous Zirconia Layers Fabricated by EB-PVD, Scripta Materialia, 52 [7] (2005) 553-558, 2005.07.
98. T. Nishiwaki, H. Mihashi, B.K.Jang, M, Sugita and K.Miura, Development of Self-Healing System for Concrete with Selective Crack Heating, Journal of Structural and Construction Engineering,, 593 [7] (2005) 25-30, 2005.07.
99. T. Nishiwaki, H.Mihashi, B.K.Jang and M.Sugita, Development and Self-Healing Concrete with Heating Device, Concrete Research and Technology, 16 [2] (2005) 81-88, 2005.07.
100. B.K.Jang, M. Yoshiya and H. Matsubara, Influence of Number of Layers on Thermal Properties of Nano-Pore Dispersed Zirconia Coating Film Fabricated by EB-PVD, Journal of the Japan Institute of Metals and Materials, 69 [1] (2005) 56-60, 2005.07.
101. B.K.Jang, and H. Matsubara, Electrical Resistance Measurement of Conductive Oxide Dispersed Glass Composites for Self Diagnosis, Ceramic Transactions, 165 (2005) 39-46, 2005.07.
102. B.K.Jang and H. Matsubara, Electrical Resistance Measurement of RuO2 Dispersed Glass Composites during Tensile Loading, Materials Letters, 59 [2-3] (2005) 266-270, 2005.02.
103. Nishiwaki, H. Mihashi, B.K.Jang and K. Miura, Development of Self-Healing System about Resistance of Water Permeability for Concrete, Journal of Japan Concrete Engineering, 27 [1] (2005)1579-1584, 2005.01.
104. M.Yoshiya, N. Wada, B.K.Jang and H. Matsubara, Computer Simulation of Nano-Pore Formation in EB-PVD Thermal Barrier Coatings, Surface and Coatings Technology, 187 [2-3] (2004) 399-407, 2004.07.
105. B.K.Jang and H. Matsubara, Electrical Resistance of Al2O3 Fiber Reinforced RuO2/Glass Hybrid Composites during Tensile Loading, Journal of Materials Science, 39 [7] (2004) 2573-2575, 2004.07.
106. B.K.Jang, M.Yoshiya, N. Yamaguchi and H. Matsubara, Evaluation of Thermal Conductivity of Zirconia Coating Layers Deposited by EB-PVD, Journal of Materials Science, 39 [5] (2004) 1823-1825, 2004.07.
107. B.K.Jang, and H. Matsubara, Analysis of Thermal Conductivity and Thermal Diffusivity of EB-PVD Coating Materials, Transactions of the Materials Research Society of Japan, 29 [2] (2004) 417-420, 2004.07.
108. B.N.Kim, K.Hiraga,Y. Sakka and B.K.Jang, Effect of Cavitation on Super Plastic Flow of 10%Zirconia-Dispersed Alumina, Scripta Materialia, 45 [1] (2001) 61-67, 2001.07.
109. B.K.Jang, N.Toyama and T.Kishi, Mechanical Properties and Manufacturing of TiNi/CFRP Smart Composites, Int. J. of Materials and Product Technology, 16 [1-3] (2001) 117-124, 2001.07.
110. I.K.Bae, Y.G.Lee, W.S.Cho, S.W.Choi, B.K.Jang and S.M.Lim, Effect of Carbon-coated SiC Whiskers on the Mechanical Properties of SiC Whisker Reinforced Silicon Nitride Ceramic Composite, Journal of the Korean Ceramic Society, 36 [10] (1999) 1007-1015, 1999.07.
111. B.K.Jang and S.K.Woo,, Toughening Characteristic of Ceramic Composites by Microcracking, Korean Journal of Materials Research, 9 [2] (1999) 132-138, 1999.07.
112. B.K.Jang and T.Kishi, Fabrication and Microstructure of Al2O3 Matrix Composites by In-situ Reaction in the Al2O3-La2O3 System, Journal of the Ceramic Society of Japan, 106 [8] (1998) 739-743, 1998.07.
113. B.K.Jang and T.Kishi, Effect of Nano-Sized SiC and Micro-Sized YAG Dispersion on the Microstructure of Alumina, Journal of the Ceramic Society of Japan, 106 [2] (1998) 138-143, 1998.07.
114. S.K.Woo, B.K.Jang, I.S.Han, D.W.Seo, K.S.Hong, K.Bae and J.H.Yang, Fabrication and Microstructural Evaluation of ZrB2 Ceramics by Liquid Infiltration, Composite Materials, 4 (1998) 331-341, 1998.07.
115. B.K.Jang, Analysis of Toughening Mechanism of Ceramic Composites by Acoustic Emission, Journal of the Korean Ceramic Society, 34 [11] (1997) 1129-1138, 1997.07.
116. .K.Jang, M. Enoki, T. Kishi, S.H. Lee and H.K.Oh, Fracture Behaviour and Toughening of Alumina-Based Composites Fabricated by Microstructural Control, Fracture Mechanics of Ceramics, 12 (1996) 371-382, 1996.07.
117. B.K.Jang, M. Enoki, T. Kishi and H.K.Oh, Effect of Second Phase on Mechanical Properties and Toughening of Al2O3 Based Ceramic Composites, Composites Engineering, 5 [10-11] (1995) 1275-1286, 1995.07.
118. B.K.Jang, M.Enoki and T.Kishi, The Effect of Microstructure on Mechanical Properties of Alumina-Based Composites by Particulate-Precipitated Dispersion, Ceramic Transactions, 46 (1994) 343-353, 1994.07.
119. B.K.Jang, M. Enoki and T. Kishi, Control of Microstructure of Alumina Ceramics by Dispersion of Nano SiC Particulates, J. Ceram. Soc. Jpn. Internationl Edition, 102 (1994) 861-865, 1994.07.
120. B.K.Jang, and T. Kishi, Fabrication and Microstructure of Al2O3-SiC-YAG Hybrid Composites Prepared by Particulate-Dispersion, Journal of the American Ceramic Society, 77 [5] (1994) 1375-1376, 1994.07.
121. B.K.Jang and Y. K. Park, Oxidation Behavior of Sialon, J. Kor. Ceram. Soc. , 26 [3] (1989) 341-346, 1989.07.
122. B.K.Jang and Y. K. Park, Synthesis of AlN Polytypes from AlN-SiO2-Al2O3 System, Journal of the Korean Ceramic Society, 26 [1] (1989) 31-36, 1989.07.
123. B.K.Jang and H. L. Lee, Mechanical Properties of Sialon Prepared from Wando Pyrophyllite, Journal of the Korean Ceramic Society, 23 [4] (1986) 17-22, 1986.07.
124. B.K.Jang and H. L. Lee, Synthesis of Sialon from Wando Pyrophyllite, Journal of the Korean Ceramic Society, 22 [5] (1985) 35-42, 1985.07.