摘要
A modified model using phase-field method in order to describe the microstructural development for the reaction templated grain growth process was developed.The current model well expressed anisotropic enlargement of the template particles.The initial parameters such as the matrix particles size,the template particles size,fraction,aspect ratio of the template particles and porosity were examined.The simulation results show that the fraction of oriented grains increases with decreasing the matrix particles size and porosity,and increasing the fraction of the initial template particles.An increase for the aspect ratio of template particles gives rise to the anisotropic microstructure development.The study suggests that the simulation results would give a guiding principle in terms of the initial preparation conditions for the textured ceramics having both a large fraction of oriented grains and anisotropic microstructure.
基金
supported by Aviation Science Foundation of China,Basic Research Foundation of Northwestern Polytechnical University,and the Doctorate Foundation of Northwestern Polytechnical University.
