Flux-Driven Lateral Grain Growth during Reactive Diffusion

Abstract

Lateral grain growth accompanies intermetallic compound growth. Moreover, it can be induced by reactive phase transformation at low temperatures (at frozen bulk diffusion). In its turn, the evolution of grain size (at low temperature) influences the rate of diffusive reaction. This synergy of the Reaction-Driven Grain Growth and Diffusion-Controlled Reaction is analysed. Power laws for the intermetallic compound growth with time exponent 0.4 and the lateral grain growth with time exponent 0.2 are predicted.