A fast scanning calorimetry study of nucleation in a Se90Te10 glass

Abstract

Fast scanning calorimetry has been used to study isothermal nucleation rates in a Se90Te10 chalcogenide glass. Calorimetry scans at 2000 degrees C/s, sufficient to suppress crystallization of glass, were used on samples subjected to combined nucleation-growth treatments. Nuclei densities were obtained from the analysis of melting-peaks using the Johnson-Mehl-Avrami-Yerofeeyev-Kolmogorov equation. The estimated densities and rates of nuclei agree with results obtained from microscopic studies and conventional differential scanning calorimetry.