Abstract
It is very difficult to prepare full-densified aluminum nitride-boron nitride (AlN/BN) composite ceramics with homogeneous microstructure and high thermal conductivity. Spark plasma sintering (SPS) was used to fully densify the AlN/BN composites in this work. Microstructure, mechanical properties and thermal conductivity of the SPS sintered AlN/BN composites with 5–30 vol% BN were investigated. The results show that the microstructure of composites is fine and homogenous, and the AlN/BN composites exhibit high mechanical properties. To promote the growth of AlN grains and modify the distribution of grain boundary in AlN/BN composites, a heat treating methodology was introduced through gas pressure sintering (GPS). This processing was significantly beneficial to enhancing the thermal conductivity of the specimen. The thermal conductivity of AlN/BN composites with 5–30 vol% BN reached 60 W/m·K after the samples were treated by GPS.
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References
K S Mazdiyasni, R Ruh, E E Hermes. Phase Characterization and Properties of AlN-BN Composites[J]. Am. Ceram. Soc. Bull., 1985, 64(8): 1 149–1 154
S Du, Z Liu, LQ Gao, et al. Dielectric Properties of AlN-BN Composite Ceramics[J]. Am. Ceram. Soc. Bull., 1997, 76(12): 69–73
T D Xiao, K E Gonsalves, P R Strutt, et al. Synthesis of AlN/BN Composite Materials via Chemical Processing[J]. Ceramic Engineering and Science Proceedings, 1993, 14(9/10): 1 107–1 114
M L Qin, X H Qu, B H Duan, et al. The Fabrication of Machinable AlN-BN Composite Ceramics[J]. Rare Metal Materials and Engineering, 2004, 33(11):1 186–1 190(in Chinese)
T Kanai, K Tanemoto, H Kubo. Reaction-bonded Boron Nitride-Aluminum Nitride Ceramic Composites[J]. Jpn. J. Appl. Phys., 1991, 30(4): 1 235–1 238
GJ Zhang, J f Yang, M Ando, et al. Nonoxide — Boron Nitride Composite: In situ Synthesis, Microstructure and Properties [J]. Journal of the European Ceramic Society, 2002, 22: 2 551–2 554
T Kanai, K Tanemoto, H Kubo. Hot-pressed BN-AlN Ceramic Composites of High Thermal Conductivity[J]. Jpn. J. Appl. Phys., 1990, 29(4): 683–687
T Kanai, K Tanemoto, H Kubo. Hot-pressed BN-AlN Ceramic Composites with High Thermal Conductivity-part II[J]. Jpn. J. Appl. Phys., 1992, 31(5A): 1 426–1 427
T Kanai, K Tanemoto. Hot-pressed BN-AlN Ceramic Composites of High Thermal Conductivity-part III[J]. Jpn. J. Appl. Phys., 1993, 32(8):3 544–3 548
W S Cho, Y H Lee, M W Cho, et al. Microstructure and Mechanical Properties of AlN-BN Based Machinable Ceramics [J]. Key Engineering Materials, 2004, 264–268: 873–876
D M Zhang, Z Y Fu. Mechanism and Application of Spark Plasma Sintering Technology[J]. Journal of Wuhan University of Technology, 1999, 21(6):15–17(in Chinese)
M Omori. Sintering, Consolidation, Reaction and Crystal Growth by Spark Plasma System (SPS) [J]. Materials Science Engineering, 2000, A287:183–188
M J Li, L M Zhang, Q Shen, et al. Microstructure and Properties of Spark Plasma Sintered AlN Ceramics[J]. Journal of Materials Science, 2006, 41: 7 934–7 938
Y Lee, Y Kim. Microstructure and Mechanical Properties of SiC-BN Composites with Oxynitride Glass[J]. Journal of the Korean Ceramic Society, 2003, 40(3): 229–233
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Funded by the National Natural Science Foundation of China (No.50232020) and Wuhan University of Technology(No.471-38650199)
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Li, M., Zhang, L., Shen, Q. et al. Effects of microstructure modification on properties of AlN/BN composites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 121–124 (2008). https://doi.org/10.1007/s11595-006-1121-y
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DOI: https://doi.org/10.1007/s11595-006-1121-y