高温蠕变空位凝聚区的凝聚扩散

CONDENSATION-DIFFUSION OF VACANCY CONDENSATION ZONE AT HIGH TEMPERATURE

讨论局域凝聚扩散现象，导出局域凝聚-扩散方程并给出解的存在唯一性定理．对凝聚-扩散方程的稳定性的分析获得结论，定态解的稳定性由凝聚函数控制，并导出一元系统和二元系统的失稳临界条件表达式．

The phenomena of local condensation-diffusion is discussed in this paper. The local condensation-diffusion equation is deduced and the existence and uniqueness of its solution are proved. The stability analysis for the condensation-diffusion equation shows that the stability in the steady-state solution is controlled by the condensing function. The expression of critical condition for instability is presented in monobasic and binary system.