In the analyses of the kinetics of diffusion-controlled phase transformation the availability of analytical solutions for dissolution is limited compared to those for growth. The difficulty seems to arise from the fact that one has to deal with a non-zero initial radius in the dissolution of precipitates. To alleviate this difficulty several approximate analyses, i.e. invariant-field, invariant-size (stationary-interface, SI) and linearized gradient (LG) approximations etc., were devised and the accuracy of
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