Structures and Mechanical Properties of Ti-37.5at%Si Compacts Prepared by High Hydrostatic Pressure Consolidation Using Mechanically Alloyed Powders

Abstract

Ti-37.5at%Si powder mixtures were mechanically alloyed in a-planetary ball mill under an Ar atmosphere. The powder prepared by milling for 50 hr, consisted of amorphous and nano-sized Si grains, was consolidated using a cubic type anvil apparatus under a high hydrostatic pressure of 5.4GPa. The compact consolidated at 623K was fully densified with the retention of non-equilibrium structures. The compressive strength of the compact at room temperature was about 2.5GPa.