F. X. Ye, X. Yang, H. -. J. Meng, Tianjin University, Tianjin, China
High-strength amorphous Mg alloy is becoming more and more important for its potential industrial application prospect since 1990s. In this study, Mg58Cu42 and MgCu2 amorphous powders, which are expected as thermal spray feedstock powders to deposit amorphous coatings, were prepared by mechanical alloying method. The influence of milling parameters and raw material compositions on the alloy compositions, glass-forming ability and thermal properties were investigated in this study. The results showed that the rotation speed of 300 r/min and the 200:
1 of the weight ratio of powder to ball were optimum parameters to get amorphous Mg58Cu42 and MgCu2 powders. The glass-forming ability of MgCu2 was better that that of Mg58Cu42. The Mg became the solid solute phase in Cu after 40 hr. ball milling time and 300 r/min rotation speed for MgCu2 chemical composition and it was 90 hr. for Mg58Cu42 composition. The crystallized temperatures of amorphous MgCu2 and Mg58Cu42 were approximated to 634 K and 620 K respectively.
Summary: High-strength amorphous Mg alloy is becoming more and more important for its potential industrial application prospect since 1990s. In this study, Mg58Cu42 and MgCu2 amorphous powders, which are expected as thermal spray feedstock powders to deposit amorphous coatings, were prepared by mechanical alloying method. The influence of milling parameters and raw material compositions on the alloy compositions, glass-forming ability and thermal properties were investigated in this study.
