A study on the thermal stability of some alloys in the Sb-As-Se glassy system by differential scanning calorimetry

摘要

The thermal stability and crystallization of alloys in the Sb-As-Se glassy system have been studied by differential scanning calorimetry (DSC). A comparison of various simple quantitative methods to assess the level of stability of the glassy materials in the above-mentioned system is presented. All of these methods are based on characteristic temperatures, such as the glass transition temperature, T_g, the onset temperature of crystallization, T_(in) the temperature corresponding to the maximum crystallization rate, T_p, or the melting temperature, T_m In this paper, the parameter K_r(T) is added to the stability criteria. The thermal stability of some ternary compounds of the Sb_xAs_(0.36)Se_(0.64-x) type has been evaluated experimentally and correlated with the activation energies of crystallization by this kinetic criterion and compared with those evaluated by other criteria.