PRODUCTION OF TIB2-DISPERSED TIAL-BASE COMPOSITE MATERIAL

摘要

PURPOSE: To provide the composite material which is suppressed in the degradation in ductility and has excellent hardness by forming TiB₂ in a stable state in the presence of molten Ti by a reaction process. ;CONSTITUTION: A heated melt in which a boride more unstable than the TiB₂ is dissolved is formed from the raw materials of a TiAl intermetallic compd. and the boride and is solidified as it is. As a result, the TiB₂ formed by the reaction is dispersed by 0.3 to 10vol.% into the TiAl-base composite material. The B diffused and fined by the dissolution of the boride is considered to crystallize or precipitate the TiB₂ by reacting with Ti. Since the reaction to form the TiB₂ is induced without segregation in the melt, the fine TiB₂ is estimated to be formed uniformly in the TiAl intermetallic compd.;COPYRIGHT: (C)1994,JPO&Japio