Development of new-type metallic glasses by using multi-step liquid phase separation

点击翻译按钮获取中文摘要

A dual-layer ribbon of Co-Si-B-Cu alloy was prepared by the single-roller melt-spinning method. The substrate surface comprised Co-Si-B-based amorphous phase with Cu crystalline nanoscale globules, while the free surface showed a thin crystalline Cu layer . A macroscopically separated unique structure was obtained by the simultaneous occurrence of liquid phase separation of the Co-Cu-based alloy system and amorphous phase formation in the Co-Si-B alloy layer. Rapidly-solidified wire with macroscopically separated structure was formed in Fe-Si-B-Cu alloy by Arc-melt-type melt-extraction method. Unique core-wire / surface-cover-layer structure composed with core Fe-Si-B amorphous based alloy and cover Cu crystal was formed through liquid phase separation during rapid quenching of thermal melt.