한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제29권3호
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  • Pages.273-278
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  • 2012
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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초고온용 ZrB2-계 세라믹스의 치밀화와 물성

Densification and Properties of ZrB2-based Ceramics for Ultra-high Temperature Applications

  • 김성원 (한국세라믹기술원 이천분원) ;
  • 김형태 (한국세라믹기술원 이천분원) ;
  • 김경자 (한국세라믹기술원 이천분원) ;
  • 서원선 (한국세라믹기술원 그린세라믹본부)
  • Kim, Seong-Won (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyung-Tae (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Kyung-Ja (KICET Icheon Institute, Korea Institute of Ceramic Engineering and Technology) ;
  • Seo, Won-Seon (Green Ceramics Division, Korea Institute of Ceramic Engineering and Technology)
  • 투고 : 2012.01.17
  • 심사 : 2012.01.31
  • 발행 : 2012.03.01
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초록

$ZrB_2$ has a melting temperature of $3245^{\circ}C$ and a low density of $6.1\;g/cm^3$, which makes this a candidate for application to ultra-high temperature over $2000^{\circ}C$. Beside these properties, $ZrB_2$ has excellent resistance to thermal shock and oxidation compared with other non-oxide engineering ceramics. This paper reviewed briefly 2 research examples, which are related to densification and properties of $ZrB_2$-based ceramics for ultra-high temperature applications. In the first section, the effect of $B_4C$ addition on the densification and properties of $ZrB_2$-based ceramics is shown. $ZrB_2$-20 vol.% SiC system was selected as a basic composition and $B_4C$ or C was added to this system in some extents. With sintered bodies, densification behavior and hightemperature (up to $1400^{\circ}C$) properties such as bending strength and hardness are examined. In the second section, the effect of the SiC size on the microstructures and physical properties is shown. $ZrB_2$-SiC ceramics are fabricated by using various SiC sources in order to investigate the grain-growth inhibition and the mechanical/thermal properties of $ZrB_2$-SiC.

키워드

참고문헌

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