TiAl金属间化合物及其连接技术的研究进展

Advances in TiAl Intermetallics and Its Joining Technology (Ⅰ)——Advances in TiAl Intermetallics

近年来 ,TiAl金属间化合物由于其密度小、硬度大、耐高温、具有优良的抗氧化能力等独特的性能 ,因此越来越引起广泛的关注并得到了迅猛的发展。根据目前TiAl金属间化合物被认为是在航空、航天飞行器等军事和民用两者都具有广泛应用前景的高温结构材料 ,文中介绍了世界范围内TiAl金属间化合物研究发展现状。TiAl金属间化合物有效的运用必须要有可靠的连接技术 ,因此TiAl金属间化合物的连接问题是其实用化所要面临的问题之一。固态焊接是实现TiAl金属间化合物连接十分有效的方法。文中介绍了TiAl金属间化合物连接技术的发展现状 ,重点评述了TiAl金属间化合物固态焊接的研究状况 。

In recent years,considerable interest has developed in TiAl intermetallics because of unique properties such as low density,good stiffness,high elevated temperature strength,and excellent oxidation resistance.TiAl intermetallics has been considered as ideal new high temperature structure materials with potential applications in spacecraft and aircraft for both military and civil purposes.The research status of TiAl intermetallics in the world is introduced.It is necessary to research on the joning technology of TiAl intermetallics for its application.Solid state bonding is very effective treatment for the joining of TiAl intermetallics.The research status of the joning technology of TiAl intermetallics is reviewed with emphasis on the solid state bonding technology status.Topics need further investigation are also pointed out.