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자전고온합성법으로 제조한 이규화몰리브덴 발열체의 소결특성에 미치는 소결조건 및 첨가물의 영향
심건주,장대규,서창열,김운백,Sim, Geon-Ju,Jang, Dae-Gyu,Seo, Chang-Yeol,Kim, Un-Baek 한국재료학회 1995 한국재료학회지 Vol.5 No.8
MoSi$_2$heating elements were fabricated using MoSi$_2$, powder prepared by SHS. Their apparent density, electrical resistivity, bending strength and victors hardness were measured as a function of sintering temperature, time and the amount of ceramic additives. The additives were A1$_2$O$_3$, SiO$_2$and bentonite which were added as a plastisizer. The electrical resistivity of MoSi$_2$decreased with the increase in the apparent density as expected. It decreased when the additives were added and the increase was the largest for the case of SiO$_2$. The bending strength and hardness decreased when the grain size becomes larger which is opposite to the expectation from the Hall-Petch type relation. Instead, they showed inverse proportionality with the volume fraction of pores probably in an exponential manner. The strength and hardness also decreased with the additives.