MANUFACTURING PROCESSES AND PROPERTIES OF CLAD METALS BY PLASTIC WORKING

Intermetallic compound Nb3Al superconducting wires were successfully fabricated by newly developed process, in which thin chips of Nb sandwich-rolled with Al were used as starting materials. This was termed the Clad-chip Extrusion(CCE) process . The fabrication process and the effects of several factors on the wire's performance were studied. Furthermore, the workability of the high Tc superconducting ceramics (YBa2Cu3Oy) was improved by the Peripheral Shear Bonding(PSB) process, where a preformed ceramic core is tightly joined with a metal sleeve. Properties of the joint interface and workability of the multi-type billet for the advanced material products were discussed. These CCE and PSB processes research have proven to raise the level of workability for intermetallic compounds and ceramics and the possibilities look favorable for hard alloys.