アルミニウム合金とアルミナの摩擦圧接とその界面解析

抄録

Ceramics, which have excellent wear resistance, corrosion resistance and hardness at high temperatures, can be used for metal cutting tools and engine pistons. However, since ceramics are expensive, it is possible to reduce costs by joining with relatively inexpensive metals by friction welding. On the other hand, friction welding is a method employing the heat generated through mechanical friction between one surface in relative rotating motion to another surface, with the addition of a lateral force called "upset" pressure to plastically deform and hence join the two dissimilar materials. In this study, for the first time Al₂O₃ round bar and Al alloy (AC8A) round bar were joined by friction welding. The upset pressure was optimized to obtain successful joints. The microstructure at the interface region of joined materials was observed by a field emission scanning electron microscope. From the analysis results, we propose appropriate conditions for friction welding these two materials.