Effect of Ni Addition on the Glass Forming Ability and Mechanical Properties in Cu<SUB>60</SUB>Zr<SUB>22</SUB>Ti<SUB>18</SUB> Metallic Glass Alloy

Abstract

This paper investigates the effects of Ni addition on the glass forming ability (GFA) and mechanical properties in Cu60� xNixZr22Ti18 (x ¼ 0� 15) metallic glass alloys. Partial substitution of Cu by Ni in the alloys improved the GFA. By increasing Ni content x from 0 to 6, the supercooled liquid region (� Tx) and crystallization temperature (Tx) were increased, whereas the liquidus temperature decreased to reach the lowest value at x ¼ 6. The lowering of liquidus temperature improved the GFA, and the maximum GFA of 6 mm in diameter was obtained at x ¼ 6. The compressive strength and micro hardness of the alloys were raised by increasing Ni content, and the Ni containing alloy showed some macroscopic plasticity after yielding. [doi:10.2320/matertrans.MRA2008041]