Abstract
Cu-14A1-4(3)Ni-base shape memory alloy is fabricated by centrifugal atomization process. Boron, titanium and zirconium are added to the master alloy, respectively. It is investigated with regard to the effect of these additions on the refinement of microstructure, yields of the powders, powder properties and aging characteristics of the compacts. High yields are obtained in CuAI-NiZr and CuAINiBTi powders. The microstructure of CuA1NiZr powder compact prepared from hot-pressing is refined as compared with those of other compacts. The precipitation time of γ2 phase in the powder compacts prepared by this process is longer than that of the casting having the same chemical composition.
