Patent ID: 8613812

Claim:
A method of making a Zr-rich amorphous alloy article, comprising the steps of: (a) providing a Zr-rich master alloy made of Zr—Cu—Al—Ni—Nb alloy, wherein said providing a master alloy comprises providing raw Zr having a purity substantially in a range of 98% to 99.9%; (b) providing a vacuum induction furnace, and melting the Zr-rich master alloy in the vacuum induction furnace at a temperature in a range of about 1100 degrees Celsius to about 1200 degrees Celsius while keeping the degree of vacuum in a range of about 10 −2 Pa to about 10 −3 Pa; (c) cooling the Zr-rich master alloy to a temperature in a range of about 800 degrees Celsius to about 900 degrees Celsius in a time period of about 30 min to about 40 min, while keeping the degree of vacuum in a range from about 10 −2 Pa to about 10 −3 Pa; (d) casting the Zr-rich master alloy into a plurality of ingots, and then cooling the ingots to a temperature in a range of about 200 degrees Celsius to about 350 degrees Celsius; and (e) die casting the ingots to obtain the Zr-rich amorphous alloy articles with a thickness in a range of about 0.5 mm to about 2 mm.