Good News Evaporation Material
Un article de XMIX.
An Evaporation Material is used in manufacturing a VTR tape, a vertical magnetic recording thin film or the like. The Evaporation Material is a wire comprising a cobalt metal a cobalt--nickel alloy containing not more than 30 weight % of nickel, or a cobalt--chromium alloy containing not more than 30 weight % of chromium. This wire has a diameter of at least 1.0 mm and not more than 10 mm, a tensile strength of at least 400 MPa and not more than 1500 MPa, and an elongation and a reduction of area of at least 5%. The Evaporation Material has a prescribed crystal structure, with a face centered cubic lattice ratio of at least 0.1 and not more than 1. It is possible to obtain a wire having the above properties by heating the metal material to at least Tu° C. and thereafter performing plastic working of reduction in area of at least 10% in a single pass at a temperature of at least Td° C. and not more than (Tu+200)° C. Preferably, the cobalt metal or the cobalt--nickel alloy further contains 0.01 to 0.1 weight % of Mn, Cr, Mg, Zr or Ca. Preferably, the cobalt--chromium alloy further contains 0.01 to 0.1 weight % of Mn, Mg, Zr or Ca.
