【摘要】 γ TiAl基合金是一种具有发展前途的新一代高温结构材料。首先综述了γ TiAl基合金的性能特点和应用前景 ,并简单介绍了该合金的最新基础研究情况。随后介绍了采用粉末冶金方法制备γ TiAl基合金的基本工艺、力学性能 ,最后结合γ TiAl基合金排气阀和板材的研制论述了粉末冶金在γ TiAl基合金制备及近净成形方面的优势和发展前景更多还原

【Abstract】 TiAl base alloys have been considered as new high temperature structural materials for promising application in aerospace and high performance engines. The properties, applications of γ TiAl base alloys have been reviewed, and the progress in fundamental aspects of these materials has been outlined. Subsequently, the process and mechanical properties of PM γ TiAl base alloys have been introduced. Finally, the advantages and development of PM process in preparing and near net shaping of γ TiAl base alloys have been described by citing the fabrication of γ TiAl base alloy valves and plates.更多还原