Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of ZrB2-based Composites for Ultra-high Temperature Materials

초고온 소재용 ZrB2계 복합소재의 제조

  • Kim, Seong-Won (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Chae, Jung-Min (Department of Advanced Materials Engineering, Korea University) ;
  • Lee, Sung-Min (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Oh, Yoon-Suk (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyung-Tae (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Nahm, Sahn (Department of Advanced Materials Engineering, Korea University)
  • 김성원 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 채정민 (고려대학교 신소재공학부) ;
  • 이성민 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 오윤석 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김형태 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 남산 (고려대학교 신소재공학부)
  • Published : 2009.12.28
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Abstract

$ZrB_2$-based composites are candidate materials for ultra-high temperature materials (UHTMs). $ZrB_2$ has become an indispensable ingredient in UHTMs, due to its high melting temperature, relatively low density, and excellent resistance to thermal shock or oxidation. $ZrB_2$ powders are usually synthesized by solid state reactions such as carbothermal, borothermal, or combined carbothermal reaction. SiC is added to this system in order to enhance the oxidation resistance of $ZrB_2$. In this study, $ZrB_2$?based composites were successfully synthesized and densified through two different processing paths. $ZrB_2$ or $ZrB_2$ 25 vol.%SiC was fully synthesized from oxide starting materials with reducing agents after heat treatment at 1400$^{\circ}C$. Besides, $ZrB_2$?20 vol.%SiC was fully densified with $B_4C$ as a sintering additive after hot pressing at 1900$^{\circ}C$. The synthesis mechanism and the effect of sintering additives on densification of $ZrB_2$ ?SiC composites were also discussed.

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