Fabrication of bulk Mg-Cu-Ag-Y glassy alloy by squeeze casting

A new Mg65Cu15Y10Ag10 alloy having large glass-forming ability has been dev eloped to produce bulk Mg-based glass material. Partial replacement of Ag w ith Cu in a Mg65Cu25Ag10 alloy led to a significant improvement of glass-fo rming ability. The addition of Ag significantly decreases the melting tempe rature and also satisfies conditions of a multi-element system with a deep eutectic, large atomic-size difference between its components and a large e lectronegativity difference between the components for good glass-forming a bility. Injection casting produced bulk metallic glass of Mg65Cu15Y10Ag10 a lloy having a diameter up to 6 mm. Squeeze casting was able to produce larg er bulk metallic glass with Mg65Cu15Y10Ag10 alloy having diameter of 10 mm, due to the rapid heat extraction and undercooling of the liquid alloy, by applying pressure during solidification.