Fe-B-Si-Zr bulk metallic glasses with ultrahigh compressive strength and excellent soft magnetic properties

Abstract A series of quaternary Fe-B-Si-Zr bulk metallic glasses (BMGs) with high Fe content were prepared by minor addition of Zr into Fe-Si-B alloy using copper-mold casting method. The proper adjusting in B, Si and Zr contents leads to significant improvement in glass forming ability (GFA). The thermal, mechanical and soft magnetic properties for this kind of BMGs were investigated. The strong interactions among constituent elements render Fe77.7B15.5Si5Zr1.8 BMG ultrahigh compressive strength of 4167 MPa. The BMGs with low Zr content exhibit high saturation magnetization (Ms) of over 1.5 T. Especially, high Ms of 1.60 T and low coercive force (Hc) of 4.3 A/m have been detected in Fe77.5B15.5Si5.5Zr1.5 BMG.