Fabrication of TiB₂-20mass%Fe₃Al Cermet using by Mechanical Alloying Process

Abstract

TiB₂-30mass%Fe₃Al powder was prepared by mechanical alloying of TiB₂ powder, Fe powder and Al powder as starting materials for a short time. After a mechanical alloying, the recovery rate of 90% or more of the start materials by weight was shown from 7.2ks to 72ks. All mechanically alloyed powders were composed of TiB₂, Fe and Al. The obtained MA powders were consolidated using by a pulsed current sintering equipment. When the MA powder milling for 72ks was consolidated at 1373K under a pressure of 80MPa, it reached 96.4% of the theoretical density. Fe-Al intermetallic compound were synthesized during sintering of the MA powder by a self-propagating high temperature synthesis. This MA powder was consolidated by a pulsed current of 100Hz for 300s without cracks.