The grain growth and grain boundary migrations during solid-phase sintering of Fe2O3: Experiments and simulations
Q Cheng and YZ Wang and JL Zhang and AN Conejo and ZJ Liu, CHEMICAL ENGINEERING SCIENCE, 262, 118038 (2022).
Grain growth and grain boundary migrations are microscopic manifestations of the sintering process which have been widely studied by experiments and computational simulations. We report roasting experiments demonstrating the vital role that temperature plays in the sintering process, which show that Fe2O3 grains grow rapidly upon reaching Tammann temperature. Monte Carlo simulations have been adopted to describe the growth process, where the grain size measures the degree of grain growth, and the growth index describes the rate of growth. The three-body sintering model using molecular dynamics simulation depicts the grain boundary migrations and the law of atomic motions in this process. The results indicate that the trends of grain growth obtained by the experiments and simulations are consistent, and the grain boundary migrations mainly occur in the first stage of sintering after which is the strengthening of sintering necks. (c) 2022 Elsevier Ltd. All rights reserved.
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