Effect of titanium on glass-forming ability of Cu-Zr-Al alloys

The effect of partial substitution of Ti for Zr on the glass-forming ability was studied in Cu50Zr45-xTixAl5 (x = 0, 2.5, 5, 10) alloys by using thermal analysis and X-ray diffractometry. The glass transition temperature, T-g, of Cu50Zr45-xTixAl5 alloys decreased from 707 K at x 0 to 700 K at x = 2.5, and keeps almost constant with further increase of x. On the other hand, the crystallization temperature, T-x, decreased gradually front 767 K at v = 0 to 741 K at x = 10. The partial substitution of Zr by Ti in Cu(50)Zr(45)Als alloy promotes the glass formation. The maximum diameter for glass formation by injection casting increased from 3 mm for Cu50Zr45Al5 alloy to 4 mm for Cu50Zr42.5Ti2.5Al5 alloy.