Effect of Constraints on the Evolution of Small and Large Pores with Account of Vacancy Flows in Sintering of Biporous Materials

摘要

A modified continuum model for the sintering of biporous materials is proposed. Along with the viscous flow of the matrix resulting from the sintering potential, the vacancy flow from small to large pores is considered. The capabilities of the modified theory to consider the above phenomena are used to predict and explain the effect of constraints on local porosity increase and instability of the sintering process. Potential ways for using the results obtained are identified.