TiAl基合金高温抗氧化性能的研究进展

Research Progress in High-temperature Oxidation Resistance of TiAl-based Alloys

TiAl基合金具有密度低、熔点高、抗蠕变性能优良、比强度和比刚度高等优点,很有希望作为新型高温结构材料而得到广泛应用。然而由于其高温抗氧化性能较低,应用受到一定限制。从合金化技术、表面改性技术和粉末冶金技术3方面讨论了改善TiAl基合金高温抗氧化性能的有效措施。

TiAl-based alloys are considered to be promising materials for a wide variety of high-temperature structural application owing to low density, high melting point, excellent creep resistance, high specific strength and high specific stiffness. However, their application is greatly limited due to poor high-temperature oxidation resistance. This paper focuses on some effective methods improving the property of high-temperature oxidation resistance, such as alloying technique, surface modification technique and powder metallurgy technique.