The effect of partial substitution of Ti for Zr on the glass-forming ability was studied in Cu 50 Zr 45Àx Ti x Al 5 (x ¼ 0, 2.5, 5, 10) alloys by using thermal analysis and X-ray diffractometry. The glass transition temperature, T g , of Cu 50 Zr 45Àx Ti x Al 5 alloys decreased from 707 K at x ¼ 0 to 700 K at x ¼ 2:5, and keeps almost constant with further increase of x. On the other hand, the crystallization temperature, T x , decreased gradually from 767 K at x ¼ 0 to 741 K at x ¼ 10. The partial substitution of Zr by Ti in Cu 50 Zr 45 Al 5 alloy promotes the glass formation. The maximum diameter for glass formation by injection casting increased from 3

The effect of partial substitution of Cu for Ag and Pd on the glass forming ability of Mg 65 Cu 25 Gd 10 alloy has been studied. Mg 65 Cu 15 Ag 5 Pd 5 Gd 10 bulk metallic glass with diameter of at least 10 mm can successfully be fabricated by conventional Cu-mold casting method in air atmosphere. The critical cooling rate for glass formation is estimated to be $0:7 K/s. The compressive fracture strength and fracture elongation of the Mg 65 Cu 15 Ag 5 Pd 5 Gd 10 bulk metallic glass are 817 MPa and 1.6% respectively.

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