Abstract
Ti5Si3 powder was synthesized by mechanical alloying (MA) of Ti powder and Si powder using a vibrational ball milling under 35kPa Ar. When stainless steel was used as a vessel and balls for MA, the obtained MA powder was amorphous and included a considerable amount of Fe because of adhesive wear of MA balls.
ZrO2 ball forms coating layer on the surface of a ball in MA process, so that the contamination from MA ball to MA powder can be reduced. The Ti5Si3 powder milled for 720ksec with ZrO2 balls was not amorphous and contained Ti and Si crystal phase. WSi2 powder and MoSi2 powder were not synthesized by MA of W powder and Si powder or Mo powder and Si powder for 720ksec with ZrO2 balls.
