| 摘要 |
The present invention provides Cu-base amorphous alloys comprising an amorphous phase of 90% or more by volume fraction. The amorphous phase has a composition represented by the formula: Cu100-a-b(Zr+Hf)aTib or Cu100-a-b-c-d(Zr+Hf)aTibMcTd, wherein M is one or more elements selected from the group consisting of Fe, Cr, Mn, Ni, Co, Nb, Mo, W, Sn, Al, Ta and rare earth elements, T is one or more elements selected from the group consisting of Ag, Pd, Pt and Au, and a, b, c and d are atomic percentages falling within the following ranges: 5<a<=55, 0<=b<=45, 30<a+b<=60, 0.5<=c<=5, 0<=d<=10. The Cu-base amorphous alloy has a high glass-forming ability as well as excellent mechanical properties and formability, and can be formed as a rod or plate material with a diameter or thickness of 1 mm or more and an amorphous phase of 90% or more by volume fraction, through a metal mold casting process.
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