NEAR-NET SHAPE PROCESSING OF TIAL INTERMETALLIC COMPOUNDS VIA PSEUDOHIP-SHS ROUTE

gamma-Titanium aluminide (TiAl) is well known to have excellent potent ial for high temperature structural applications. The self propagating high-temperature synthesis (SHS) process has been expected to provide new fabrication routes for intermetallic materials. In recent years, considerable research on the reactive sintering process has been carri ed out for near-net shaping of intermetallics. In this study, we prese nt a new fabrication route based on a combination of pseudoHIP and SHS to produce TiAl intermetallic compounds with the controlled microstru cture and improved deformability. Reactive bonding of TiAl compounds a lso can be achieved by the SHS process, in particular, by use of pseud oHIP-SHS. It should be emphasized that the combination of pseudoHIP an d SHS is effective in utilizing the heat release and transient liquid phase involved in SHS to obtain near-net shape products of TiAl interm etallic compounds with a high material density.