放电等离子体烧结陶瓷材料微观组织演变模拟  

Microstructure Evolution Simulation of Ceramic Materials Sintered by Spark Plasma

作　　者：白祎凡 王东[1] 武炎楠 BAI Yifan;WANG Dong;WU Yannan(Xi’an Technological University,Xi’an 710021,China;Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]西安工业大学,西安710021 [2]陕西科技大学,西安710021

出　　处：《机械工程师》2021年第2期48-50,56,共4页Mechanical Engineer

基　　金：陕西省自然科学基金青年项目(2018JQ5127);陕西省博士后基金(2018BSHEDZZ13);陕西省教育厅重点实验室项目(18JS045)。

摘　　要：构建了一个符合放电等离子体烧结法制备陶瓷材料微观组织演变规律的元胞自动机模型,成功将放电等离子体烧结法的烧结参数耦合进所构建的模型,并建立了气孔演变的模拟方法。在模拟结果中,晶粒粒径随保温时间与烧结温度的增加呈指数趋势增长,气孔随着烧结温度与保温时间的增加逐渐减少,材料致密度增加,符合晶粒生长的拓扑学特征和晶界迁移规律。A cellular automata model conforming to the evolution of the microstructure of ceramic materials by spark plasma sintering is constructed.The sintering parameters of the spark plasma sintering method are successfully coupled into the constructed model,and a simulation method for pore evolution is established.In the simulation results,as the holding time and sintering temperature increase,the grain size increases exponentially,the pores decrease gradually,and the material density increases,which conforms to the topological characteristics of grain growth and the law of grain boundary migration.

关 键 词：元胞自动机 放电等离子体烧结法 复合陶瓷刀具 

分 类 号：TG711[金属学及工艺—刀具与模具] TF125.33[冶金工程—粉末冶金]