| 摘要 |
PROBLEM TO BE SOLVED: To provide a Zr based amorphous alloy which exhibits yield stress of >=2 GPa, and further has amorphous phase formability for forming a perfect amorphous phase even in a die casting having a diameter of 3 mm. SOLUTION: The Zr based amorphous alloy has a composition expressed by the formula of Zr100-a-b-c TMa Alb Bec [wherein, TM denotes one or more kinds selected from Fe, Co, Ni and Cu; a, b and c respectively denote atomic percentage; and 15<=a<=35, 3<=b<=15, 3<=c<=15, and 25<=a+b+c<=55 are satisfied], further contains an amorphous phase of >=90% by volume fraction, and has mechanical properties satisfying yield stress of >=2 GPa. The alloy can also be expressed by the formula of (Zr1-x (Ti, Hf)x )100-a-b-c TMa Alb Bec [wherein, x denotes atomic ratio; and 0<x<=0.5 is satisfied] in which Zr is substituted with one or more kinds selected from Ti and Hf. |
