A new kinetic model for precipitation from solid solutions

Condensed Matter Physics

关键词: homogeneous nucleation;    phase transformation kinetics;    precipitation;    point defects;    precipitate-matrix interface;   

DOI  :  10.5488/CMP.18.23603

来源: DOAJ

【 摘 要 】

This model considers reversible elementary acts of migration of point defects (interstitials and/or vacancies) across the precipitate-matrix interface and enables one to derive equations for the rates of emission and absorption of solute atoms at the interface. The model predicts much stronger heterophase fluctuations and higher nucleation rates than the classical nucleation theory does. However, asymptotically, for large precipitate sizes and long ageing times, both models give the same results, being in agreement with the Lifshitz-Slyozov-Wagner theory of coarsening.

【 授权许可】

Unknown