Abstract
The size limitation of amorphous ribbons greatly restricts industrial applications, many groups have heavily devoted themselves to investigating novel Bulk Metallic Glasses (BMGs) in these two decades. Therefore, the studies of new BMGs established the glass forming theories and led more popular applications. The purpose of this research is to develop new Fe- and Ni-based BMGs with good glass forming ability. The motivation and design of Fe-based BMGs is based on the composition of the Sendust (Fe-Al-Si) alloy that has a very high permeability. The aim of exploring new Ni-based BMGs is to develop simple ternary Ni-based BMGs with good mechanical properties and corrosion resistance. Both series of alloys exhibit good glass forming ability to form bulk glassy rods with a diameter up to 2 mm by conventional copper-mold casting method. The initial permeability of the Fe-Al-Si-based BMGs Fe67Al4Si8B15Nb1Ta1Zr1 achieves 92% of Sendust after heat treatment. The hardness of Ni-based BMGs are higher than Hv 950, and the highest fracture strength of Ni-Ta-Sn alloy system in Ni58Ta36Sn6 reaches 1192 MPa, with extremely high corrosion resistance.