Abstract
A series of [(Fe1−xCox)72Mo4B24]94Dy6 (x=0.1, 0.2, 0.3, 0.4 and 0.5at.%) bulk metallic glasses (BMGs) in rod geometries with critical diameter up to 3mm were fabricated by copper mold casting method. This alloy system exhibited good thermal stability with high glass transition temperature (Tg) 860K and crystallization temperature (Tx) 945K. The addition of Co was found to be effective in adjusting the alloy composition deeper to eutectic, leading to lower liquidus temperature (Tl). The [(Fe0.8Co0.2)72Mo4B24]94Dy6 alloy showed the largest supercooled liquid region (ΔTx=Tx−Tg=92K), reduced glass transition temperature (Trg=Tg/Tl=0.622) and gamma parameter (γ=Tx/(Tg+Tl)=0.424) among the present system. Maximum compressive fracture strength of 3540MPa and micro-Vickers hardness of 1185kg/mm2 was achieved, resulting from the strong bonding structure among the alloy constituents. The alloy system possessed soft magnetic properties with high saturation magnetization of 56.61–61.78Am2/kg and coercivity in the range of 222–264.2A/m, which might be suitable for application in power electronics devices.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
