Mixing enthalpy of liquid phase calculated by miedema's scheme and approximated with sub-regular solution model for assessing forming ability of amorphous and glassy alloys

The forming ability of amorphous and glassy alloys has been assessed with mixing enthalpy (ΔHmix) of a liquid phase based on Miedema's scheme. The ΔHmix's were calculated as a function of composition in an alloy for possible 2628 binary systems from 73 elements, and were approximated with interaction parameter Ω in a sub-regular solution model with coefficients Ωi (i = 0 to 3) for a cubic function of composition. The results revealed that 2627 systems were fitted by Ω′s within errors denoted by statistical adjusted R-square (R2) ≥ 0.999, which includes R2 = 1 for 2409 systems. The values of Ωi for 1378 systems from 53 elements were selected and tabulated for assessing the forming ability of amorphous and glassy alloys. The analysis revealed that P and C in Fe-P and Fe-C binary alloys and simultaneous additions of Ni and Cu in La-, Zr- and Pd-based bulk metallic glasses exhibit a marked and peculiar composition dependence of ΔHmix. In a framework of Miedema's scheme, the most accurate values of ΔHmix for a liquid phase have been provided as a function of composition in an alloy system, which makes it possible to consider the forming ability of amorphous and glassy alloys deeply.