| 摘要 |
The present invention relates to a Cu-based amorphous alloy composition having a chemical composition represented by the following general formula, by atomic %: Cu<SUB>100-a-b-c-d</SUB>Zr<SUB>a</SUB>Al<SUB>b</SUB>(M<SUB>1</SUB>)<SUB>c</SUB>(M<SUB>2</SUB>)<SUB>d</SUB>, where a, b, c and d satisfy the formulas of 36<=a<=49, 1<=b<=10, 0<=c<=10, and 0<=d<=5, respectively, and c and d are not zero at the same time, and M<SUB>1</SUB>, the 4th element added to a ternary alloy of Cu-Zr-Al, is one metal element selected from the group consisting of Nb, Ti, Be and Ag, and M<SUB>2</SUB>, the 5th element added to the ternary alloy of the Cu-Zr-Al, is one amphoteric element or non-metal element selected from the group consisting of Sn and Si.
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