Dsc Evaluations in F.c.c. Solid Solutions of Short-range-order Kinetics As Influenced by Bound Vacancies
作者： A. Varschavsky , E. Donoso
关键词: Crystallography 、 Solid solution 、 Diffusion 、 Quenching 、 Kinetics 、 Differential scanning calorimetry 、 Effective energy 、 Short range order 、 Activation energy 、 Chemistry 、 Thermodynamics
摘要: A modified first order kinetic law, which describes the roles of bound and unbound vacancies, is proposed in to predict defect decay short-range-order kinetics quenched binary alloys during linear heating experiments. The model has been applied differential scanning calorimetry (DSC) curves Cu–5 at%Zn from different temperatures. Activation energy for migration solute-vacancy complexes was also assessed using DSC traces. value 89.5±0.32 kJ mol–1 obtained. relative contribution vacancies ordering process as influenced by quenching temperature determined. In conjunction, a parametric study initial total concentration effective performed envisage their influence on calculated profiles.
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