Crystallization kinetics of Se–Zn–Sb nano composites chalcogenide alloys

Crystallization kinetics could be define the working limits of the material, thereby, this work is described the kinetics of Se96Zn2Sb2 (SZS) chalcogenide alloy and its composites with 0.05% multi walled carbon nano tubes (MWCNT) and 0.05% graphene (GF). The crystallization kinetic parameters have been obtained using the Differential Scanning Calorimetric (DSC) measurement traces at 5, 10, 15 and 20 °C/min heating rates, by employing the different approximations at the glass transition, onset crystallization and peak crystallization temperatures. Subsequently, Hruby Hr glass forming ability parameter, thermal stability and nucleation and growth order parameter (n) and dimensional parameter (m) of the materials have also been discussed. Outcomes demonstrate these materials have a variation in kinetic parameters with the incorporation MWCNT and GF in SZS regime. It has been noticed MWCNT composite glass transition activation energy (Eg), onset crystallization temperature (Ec), peak crystallization (Ep) higher than GF composite while lowest for the parent alloy, however, a variation in Hr and thermal stability have been obtained for the composites. The overall two-one dimensional nucleation and growth mechanism have been evaluated for these materials.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Se–Zn–Sb new chalcogenide alloy. ► Chalcogenide-multi walled carbon nano tubes composite. ► Chalcogenide-bilayer graphene composite. ► Crystallization kinetics.