Microstructure evolution in sintering of alumina-zirconia ceramics simulated by a modified phase field method

摘要

The densification and grain growth during sintering of alumina-zirconia (Al_2O_3-ZrO_2) ceramics were simulated using a modified phase field method, which considered simultaneously a density field, a composition filed and orientation fields. The results indicate that the model can capture the main microstructure features in the different stages of sintering. A higher relative green density leads to a higher final density and a larger final grain size in the sintered ceramics. A higher volume fraction of the ZrO_2 phase results in a lower relative density and a smaller final grain size.