Glass forming ability and thermal stability of some Se–Sb glassy alloys

Alloys of Se-Sb glass system, obtained with rapid quenching, have been thermally characterized with calorimetric measurements. The Hruby number (H {sub R}), which is the strong indicator of glass forming tendency (GFT), thermal stability parameter (S) representing resistance to divitrification, the values of crystallization enthalpy ({delta}H {sub c}) and entropy changes during amorphous to crystalline phase transition (i.e., during crystallization process) have been evaluated for these glassy alloys. The compositional dependence of various kinetic and thermodynamic parameters has been discussed. The fragility index (F) for the present glasses has been determined to see whether these materials are obtained from kinetically strong-glass-forming (KS) or kinetically fragile-glass-forming (KF) liquids.