A new Mg₆₅Cu_7.5Ni_7.5Zn₅Ag₅Y₁₀ bulk metallic glass with strong glass-forming ability

We report a new Mg-based bulk metallic glass-forming alloy: Mg₆₅Cu_7.5Ni_7.5Zn₅ Ag₅Y₁₀. The alloy exhibits a glass-forming ability significantly stronger than all previously discovered Mg-based glass formers. Fully glassy rods 9 mm in diameter can be obtained by using copper mold casting. The critical cooling rate for glass formation was estimated to be <50 Ks⁻¹. The reduced glass-transition temperature (T_rg) of the glass was determined to be 0.59.