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J. Korean Ceram. Soc. > Volume 45(4); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(4): 245.
doi: https://doi.org/10.4191/kcers.2008.45.4.245
지르코늄 스폰지를 원료로 사용하여 화학증착법으로 제조된 탄화지르코늄 코팅층의 물성
김준규, 최유열, 이영우1, 박지연1, 최두진
연세대학교 신소재공학과
1한국원자력연구소 원자력수소생산사업팀
Properties of Chemical Vapor Deposited ZrC Coating Layer using by Zirconium Sponge Materials
Jun-Gyu Kim, Yoo-Youl Choi, Young-Woo Lee1, Ji-Yeon Park1, Doo-Jin Choi
Department of Advanced Material Science and Engineering, Yonsei University
1Nuclear Materials Technology and Development, Korea Atomic Energy Research Institute
ABSTRACT
The SiC and ZrC are critical and essential materials in TRISO coated fuel particles since they act as protective layers against diffusion of metallic and gaseous fission products and provides mechanical strength for the fuel particle. However, SiC and ZrC have critical disadvantage that SiC loses chemical integrity by thermal dissociation at high temperature and mechanical properties of ZrC are weaker than SiC. In order to complement these problems, we made new combinations of the coating layers that the ZrC layers composed of SiC. In this study, after Silicon carbide(SiC) were chemically vapor deposited on graphite substrate, Zirconium carbide(ZrC) were deposited on SiC/graphite substrate by using Zr reaction technology with Zr sponge materials. The different morphologies of sub-deposited SiC layers were correlated with microstructure, chemical composition and mechanical properties of deposited ZrC films. Relationships between deposition pressure and microstructure of deposited ZrC films were discussed. The deposited ZrC films on SiC of faceted structure with smaller grain size has better mechanical properties than deposited ZrC on another structure due to surface growth trend and microstructure of sub-deposited layer.
Key words: SiC, ZrC, Zr-sponge, Microstructure, Mechanical property
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