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中文摘要：
运用相场模型研究陶瓷粉末烧结过程中晶粒的生长和气孔演化过程。采用一组随时间和空间连续变化的取向场变量和浓度场变量来表征体系微结构，用Ginzburg—Laudau动力学方程和Cahn—Hillard动力学方程分别控制取向场和浓度场变量随时间的演化，并针对不同气相含量下的粉末烧结体系，统计其晶粒生长指数，分析气孔含量对晶粒生长的影响。计算结果表明，当烧结体系中气相含量fc在12％～20％之间变化时，随着气相含量的增加，晶粒生长指数研逐渐增大，即晶粒耦合气孔的生长演化速度随气相含量的增加而降低。计算结果与实验情况吻合。
英文摘要：
studied tion fiel b The evolution of ased on phase fiel d and orientation fi Hilliard equation microstructure of grain and pore growt d model. The mierostructure is describ eld, of which the evolution is governed and the Ginzburg tering systems,the grain grow lysed in grain growth process. when the pore content ranges growth decreases. The calculat th in Landau equation, respectively. dex and the influence of pore h during powder sintering is ed by a by the ti In different content Simulation results show that the g from 12% to 20%, and evolution ed result is consistent well with the rain growth index increases rate of grain coupled pore experimental one.
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