Mg-Cu-Ag-Gd-Ni bulk metallic glass with high mechanical strength

The effect of the Ni addition to the thermal and mechanical properties in Mg65Cu20Ag5Gd10 was investigated. Ni element has high elastic modulus and low GIB ratio, where G is shear modulus and B is bulk modulus. With the increase of Ni addition, glass transition temperature Tg increases almost monolithically from 418.6 K for Mg65Cu20Ag5Gd10 to 428.1 K for Mg65Cu12.5 Ag5Gd10Ni7.5, and 427.5 K for Mg(65)Cu(10)Ag5Gd(10)Ni(10). Compressive fracture stress increases monolithically from 820 MPa for Mg65Cu20Ag5Gd10 to 1005 MPa with the Ni addition increases to 10%. With the Ni addition, both glass transition temperature T-g and compressive fracture stress a increase. Selecting alloy addition from the viewpoint of elastic constants shows some encouraging results. (C) 2006 Elsevier B.V. All rights reserved.