The compressive stress for the shrinkage of a large pore during sintering has been analyzed by combining the effects of the pore size, the ratio of pore size to grain size, and the coordination number of the pore. Alumina has been selected to illustrate this model. The result shows that the compressive stress is a positive and increasing quantity during the sintering process with an increasing value depending on the rate of grain growth and pore shrinkage.
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Lin et al. (1988) studied this question.
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