In-situ Synthesis of TiAl Matrix Composites by Melting Route

摘要

TiAl alloys Al composition range between 45 and 49 at%, includes γ-TiAl and α_2-Ti_3Al, are an emerging high temperature materials which has higher specific strength, oxidation ratio and specific modulus than Ni base superalloy. In this study, TiAl alloys were manufactured by plasma arc melting (PAM) and then TiAl and granular boron carbide were in-situ synthesized in PAM method again. The in-situ synthesized TiAl matrix composites were investigated by using X-ray diffractometer, optical microscope, and electron probe micro-analyzer.