Properties of <TEX>$SiC/MoSi_2$</TEX> Composites Prepared by Reaction Sintering Method

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J. Korean Ceram. Soc. > Volume 31(4); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(4): 399.

반응소결에 의한 $SiC/MoSi_2$ 복합체의 특성

한인섭, 양준환, 서동수¹

한국에너지기술연구소 에너지재료연구팀
¹충남대학교 공과대학 재료공학과

Properties of $SiC/MoSi_2$ Composites Prepared by Reaction Sintering Method

ABSTRACT

The SiC/MoSi2 composite material was prepared by infiltration with the mixture of metal Si and MoSi2 into the preform of $alpha$-SiC and graphite under the vacuum atmosphere of 10-1 torr. The mechanical properties, phases and microstructural characteristics have been investigated by employing an universal testing machine, scanning electron microscope and X-ray diffractometer. With the increase of MoSi2/Si mixing content, the quantity of the residual silicon phase was decreased and the hardness and fracture toughness of composite materials were increased. Also, as the infiltration temperature increased, a lot of fine-grained $beta$-SiC phases, which were produced from the reaction of graphite and liquid silicon melt, were transformed to $alpha$-SiC phases.