Fabrication, Microstructure, and Microhardness at High Temperature of In Situ Synthesized Ti3Al/Al2O3 Composites

In this study, in situ Al2O3-reinforced Ti3Al composite was fabricated after 8 h of milling and sintering at 850 °C. A mixture TiO2 Al powders were mechanically milled a planetary mill, cold-compacted sintered under protected argon atmosphere. The microstructure microhardness the Al2O3 embedded matrix both room elevated temperature has been reported. obtained results showed that Ti3Al/Al2O3 successfully synthesized via powder metallurgy method. phase particles formed formation round uniformly distributed improved composite. At normal temperature, material measured about 11.5 GPa. Meanwhile, temperatures, from 600 to 800 °C, it decreased 4.18 GPa 3.15