Growth path envelope analysis of ostwald ripening
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Optimized procedures for performing growth path envelope (GPE) analysis of processes involving growth or shrinkage of particles have been developed, and the process has been automated using computerized statistical curve fitting and numerical analysis. The Weibull function was found to represent accurately the initial cumulative size distribution data, while a nonlinear function was found best for fitting ther-tgrowth paths for coarsening. A strategy for efficient selection of constant Nv> values for the analysis is described. The optimized methods have been applied to the analysis of Ostwald ripening during liquid-phase sintering of Cu-20Co alloy, and means for obtainingr * and growth velocities and testing coarsening theories are presented. Results from the automated procedure compare favorably with those from manual analysis but are obtained with considerably reduced effort.
KeywordsMetallurgical Transaction Growth Velocity Growth Path Weibull Function Cobalt Particle
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