| Effect of Transtion Metal (TM = Ag, Ni, Zn), as a substitution for Cu, on the glass forming ability was examined in Mg_(65)Cu_(25-x)TM_xY_(10) (x = 0, 5, 10, 15, 20, 25) alloys by using thermal analysis and X-ray diffractometry. Partial substitution of Cu with less than 15 at% Ag and 5 at% Ni in Mg_(65)Cu_(25)Y_(10) alloy enhanced the glass-forming ability. Maximum diameter for single amorphous phase formation in Mg_(65)Cu_(15)Ag_(10)Y_(10) alloy by injection casting was 6 ㎜. Both amorphous alloys prepared by melt spinning and injection casting showed similar crystallization process during continuous heating in DSC. Also in this section as composition changes, co-relationship between variation of critical diameter for formation of an amorphous phase and that of parameters suggested to reflect glass-forming ability was examined. |
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