中文摘要：

综述了TiAl基合金高温抗氧化研究进展，包括TiM基合金氧化热力学／动力学、氧化膜组成和结构及其形成过程，以及提高合金高温抗氧化性的措施。研究结果表明，TiAl基合金高温氧化动力学一般遵循抛物线规律，且受到合金相组成和组织形貌的影响。氧化膜由外向内，主要呈TiO2／Al2O3／Al2O3＋TiO2结构，氧化膜与基体界面处易形成降低合金抗氧化性的z相（Ti5Al3O2）和氮化产物（TiN，Ti2A1N）。TiAl基合金中添加适量的Nb，Y，Si，Cr，Mo等元素，在改善力学性能的同时，可明显降低合金高温氧化增重。采用表面处理技术，包括表面离子注入、表面渗透扩散处理以及磷化处理等，可在合金表面形成保护层，显著提高TiAl基合金高温抗氧化性能，然而保护层的稳定性尚需提高。采用涂层技术，包括富Al涂层、陶瓷涂层以及新兴的复合涂层等，可有效地阻止氧向内扩散，抑制TiAl基合金在高温下的氧化行为。

英文摘要：

This review article summarized recent advances in high temperature oxidation resistance of TiAl-based alloys, including the oxidation thermodynamics, oxidation kinetics, composition and structure of the oxide scales and their formation process ; and the measures to improve high-temperature oxidation resistance of these alloys. Generally, the oxidation kinetics of TiAl-based alloys was influenced by phases constitutions and structure constitutes followed the parabolic law. The scales exhibited a typical TiO2/Al2O3/Al2O3 ＋ TiO2 structure from outside to inside. Z phase （Ti5 Al3O2 ） and nitrides phase （TiN and Ti2 AlN） were found at the interface of scale and substrate, which were detrimental to the oxidation resistance. Adding appropriate Nb, Y, Si, Cr or Mo not only improved mechanical properties, but also reduced the oxidation weight gains. Surface treatment technologies including ion implantations, diffusion treatments and phosphatings could help to form protective layers which could enhance oxidation resistance obviously but their stability was not satisfactory. Coatings such Al-rich coatings, ceramic coatings and the novel complex coatings could inhibit the diffusion of oxygen effectively, and then suppressed the oxidation at high temperature.