Abstract
Joining between amorphous Ti-43at%Cu powder, which was prepared by mechanical alloying, and aluminum were attempted following three kinds of conditions. [Process 1]: Pressing into compacts prepared form the amorphous powder against the aluminum ring. [Process 2]: Cold extruding the billet which was filled by amorphous powder between core of aluminum and inside of the can. [Process 3]: Hot extruding of the same billet as the Process 2 (Process 3-1), and hot pressing of extruded samples (Process 3-2). In this study, heating temperature used was lower than the crystallization temperature in order to keep the amorphous state. Characteristic of diffusion joining between amorphous powder and aluminum rod was investigated by using scanning electron microscope and X-ray diffraction. The joining between amorphous phase and aluminum phase in the Process 1 and Process 2 are insufficient, but in the case of Process 3, joining of between the interface of both materials progressed gradually with heating time. Intermetallic compound of Al4Cu9 phase or AlTi3 phase at the interface of amorphous phase and the aluminum phase appears after heat-treatment at 523K for 36 ks in the Process 3-1 and Process 3-2.
