Patent ID: 6521062
Filing Date: 2003-02-18
Classification: C22F,C23C

Abstract:
A method for producing an alloy member characterized by a substantially microstructurally homogeneous morphology and magnetic properties optimized for forming low permeability sputtering targets therefrom, the alloy member having grain uniformity comprising an average grain size of less than 100 microns, and an average product precipitate dimension of less than 50 microns, the method comprising:a) providing an alloy which is sufficiently brittle that the alloy cannot be rolled and wrought processed to form a product having a substantially homogenous morphology; b) casting the alloy as an ingot; c) annealing the ingot by heating at a temperature of between 1500Â° F. and 2500Â° F.; d) working the annealed ingot to form an alloy member which has a thickness to width ratio of less than approximately 0.5; and e) rolling the alloy member at a temperature of between 1000Â° F. and 2500Â° F. to produce the member in the form of a rolled plate and promote densification and fine grain in the alloy member.