Bulk Glass Formation in Mg-Cu-Ag-Y-Gd Alloy

Abstract

The effect of partial substitution of Y for Gd on the glass forming ability of Mg₆₅Cu₁₅Ag₁₀Y₁₀ alloy has been studied using X-ray diffraction and differential thermal calorimetry. Partial substitution of Y by Gd improves the glass forming ability. The Mg₆₅Cu₁₅Ag₁₀Y₂Gd₈ alloy shows the highest glass forming ability among the alloys investigated, enabling the fabrication of bulk metallic glass with the diameter of 9 mm by conventional Cu-mold casting method in air atmosphere. The compressive fracture strength and fracture elongation of the Mg₆₅Cu₁₅Ag₁₀Y₂Gd₈ bulk metallic glass are 956 MPa and 1.6% respectively.