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

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.