Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Mechanical Properties of $\beta$-Sialon Prepared from Wando Pyrophyllite

완도납석으로부터 제조된$\beta$-Sialon의 기계적 성질

  • 이홍림 (연세대학교 요업공학과) ;
  • 장병국 (연세대학교 요업공학과)
  • Published : 1986.04.01
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Abstract

$\beta$-Sialon powders were prepared by the reduction-nitridation reaction from the mixture of Wando-pyrophyllite and graphite at 135$0^{\circ}C$ in $N_2-H_2$ atmosphere. The $\beta$-Sialon powders were sintered at 175$0^{\circ}C$ by the pressureless sintering for 90min and the hot-pressing for 60 min respectively. All the sintered bodies showed their relative densities higher than 94% The values of M.O.R fracture toughness(KIC) and hardness showed 32.9kpsi 2.9MN/$m^{1.5}$ , 12.1GN/$m^2$ for the pressure-less sitnered bodies and 48.6kpsi, 4.6 MN/4m^{1.5}$ 15.3GN/$m^2$ for the hot-pressed bodies respectively.

Keywords

References

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