Effect of the Size and Amount of SiC on the Microstructures and Thermal Conductivities of ZrB<sub>2</sub>-SiC Composite Ceramics

Seong-Won Kim; Chang-Sup Kwon; Yoon-Suk Oh; Sung-Min Lee; Hyung-Tae Kim

doi:10.4150/KPMI.2012.19.5.379

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ZrB₂-SiC 복합세라믹스의 미세구조와 열전도도에 미치는 SiC 크기와 첨가량의 영향: 김성원, 권창섭, 오윤석, 이성민, 김형태
Effect of the Size and Amount of SiC on the Microstructures and Thermal Conductivities of ZrB₂-SiC Composite Ceramics: Seong-Won Kim, Chang-Sup Kwon, Yoon-Suk Oh, Sung-Min Lee, Hyung-Tae Kim; Journal of Korean Powder Metallurgy Institute 2012;19(5):379-384
DOI: https://doi.org/10.4150/KPMI.2012.19.5.379

¹한국세라믹기술원 이천분원 엔지니어링세라믹센터
²한국세라믹기술원 이천분원 엔지니어링세라믹센터
³한국세라믹기술원 이천분원 엔지니어링세라믹센터
⁴한국세라믹기술원 이천분원 엔지니어링세라믹센터
⁵한국세라믹기술원 이천분원 엔지니어링세라믹센터
¹Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
²Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
³Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
⁴Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology
⁵Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology

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Abstract

This paper reports the microstructures and thermal conductivities of ZrB_2-SiC composite ceramics with size and amount of SiC. We fabricated sintered bodies of ZrB_2-x vol.% SiC (x=10, 20, 30) with submicron and nanosized SiC densified by spark plasma sintering. Microstructure retained the initial powder size of especially SiC, except the agglomeration of nanosized SiC. For sintered bodies, thermal conductivities were examined. The observed thermal conductivity values are 40~60 W/mK, which is slightly lower than the reported values. The relation between microstructural parameter and thermal conductivity was also discussed.

Keywords: ZrB_2-SiC;Spark plasma sintering;Composite ceramics;Microstructures;Thermal conductivities;

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