抄録
TiAl intermetallic compounds with composition range Ti-45 to 55 at.%Al were synthesized from elemental powder by HIP-reaction sintering. Namely, mixed powder compacts of Ti and Al were capsuled in pyrex glass tube and HIP treated at 1073 to 1573 K under a pressure of 196 MPa. Under HIP treatment temperature higher than 1523K, fully densified, sintered spacemen with a lamellar structure, typical for TiAl intermetallic compound, was obtained. It was concluded by thermal analysis and X-ray diffraction that at first several compounds of Ti-Al system, like TiAl, Ti3Al, TiAl2 and TiAl3, were synthesized by self-propageting reaction and densified by subsequent hot isostatic pressure and transformed to TiAl/Ti3Al lamellar structure.
