Ti 및 Si 혼합 분말의 전기방전소결에 의한 Titanium Silicide의 합성 연구

Abstract

The synthesis and consolidation of titanium silicide by electro-discharge-sintering has been investigated. As-received Ti powder was in flaky shape and the mean particle size was 45.0 mm, whereas the mean particle size of the pre-milled Si powder with angular shape was 8.0 mm. Single pulse of 2.5 to 5.0 kJ/0.34g-elemental Ti and pre-milled Si powder mixture with the composition of Ti-37.5 at.% Si was applied using 300 mF capacitor. The solid with Ti5Si3 phase has been successfully fabricated by the discharge with the input energy more than 2.5 kJ in less than 129 msec. Hv values were found to be higher than 1000 kgf/mm2. The formation of Ti5Si3 occurred through a fast solid state diffusion reaction.