Novel predictive methodology of amorphisation of gas-atomised Fe-Si-B alloy powders

The present work is focused on developing amorphisation capability criteria to predict regions with high amorphous forming ability (AFA) in the Fe-Si-B phase diagram. First, AFA of alloy powders was evaluated by conventional empirical glass parameters, which eventually did not guide best alloy. Then, analysis extended ternary diagram, calculated using CALPHAD, along superimposed mathematical model based topological instability factor (?), estimated critical cooling rate (RC) and particle size (dC), confine diagram larger AFA. highest shows optimum atomic mismatch when ? = 0.204. Furthermore, optimal region design alloys where Fe2B first solid under equilibrium solidification. Within these two limits, lower liquidus temperatures show for gas-atomised powders.