Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Thermomechanical Properties of $\beta$-Sialon Synthesized from Kaolin

카올린으로부터 합성한 $\beta$-Sialon의 열적.기계적 성질

  • 이홍림 (연세대학교 공과대학 요업공학과) ;
  • 임헌진 (연세대학교 공과대학 요업공학과) ;
  • 김신 (연세대학교 공과대학 요업공학과) ;
  • 이형복 (명지대학교 요업공학과)
  • Published : 1987.04.01
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Abstract

${\beta}$-Sialon powder was synthesized by the simultaneous reduction and nitridation of Hadong kaolin at 1350$^{\circ}C$ in N2-H2 atmosphere, using graphite as a reducing agent. The synthesized ${\beta}$-Sialon powder was pressurelessly sintered over 1450-1850$^{\circ}C$ in nitrogen atmosphere. The average particle size of ${\beta}$-Sialon powder was about 4.5$\mu\textrm{m}$. The relative density, M.O.R., fracture toughness and micro-hardness of ${\beta}$-Sialon ceramics sintered at 1800$^{\circ}C$ for 1 hour were 92%, 36 kpsi, 2.8MN/㎥/2 and 13.3 GN/㎡, respectively. The critical temperature difference (ΔT) in water quench thermal shock behavior showed about 375$^{\circ}C$ for the synthesized ${\beta}$-Sialon ceramics.

Keywords

References

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