Glass forming ability, mechanical and magnetic properties in Fe–W–Y–B alloys

Abstract

Glass forming ability (GFA), mechanical and magnetic properties of Fe 72W x Y 6− x B 22 ( x = 0, 1, 2 and 3 at.%) and Fe 72− x W x Y 6B 22 ( x = 1, 2, 3, 4, 5 and 6 at.%) alloys have been experimentally investigated. It is found that fully amorphous Fe 69W 3Y 6B 22 and Fe 68W 4Y 6B 22 cylindrical rods with 4 mm in diameter can be prepared by using copper mold casting. The newly developed Fe-based quaternary alloys exhibit excellent combination properties: good GFA, high onset crystallization temperature of 970 K, high fracture strength of about 4 GPa, Vickers hardness of about 1000 kg/mm 2, and good soft magnetic properties at ambient temperature (saturation magnetization of about 0.8 T and coercive force of below 2 A/m), which show potential applications in electronic industries. The effect of W addition on GFA in the Fe–Y–B alloy system is discussed.