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《Materials Review》 2007-02
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Current Status of Surface Modifications on γ-TiAl Intermetallics

HE Zhiyong,LIU Xiaoping,WANG Zhenxia, XU Zhong(Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024)  
γ-TiAl intermetallics possesse superb high temperature mechanical properties and very low density, and is believed to be the potential substitute to nickel-base super alloys which are widely used as high temperature structural materials in aero-industry currently. A major drawback of γ-TiAl is insufficient oxidation resistance at high temperature, especially above 800℃. Besides, the tribological performance of γ-TiAl is also unsatisfactory. Surface modification is feasible solution to these problems. In this paper, a review of studies on surface modification of γ-TiAl is presented and comments are made about various processes on the basis of modification effects and mechanisms.
【Fund】: 国家自然科学基金(50271045);; 国防科工委民口配套项目(MKPT-05-067);; 山西省自然科学基金(20031051);; 山西省留学基金(2004020)
【CateGory Index】: TG174
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