粉末注射成形材料微波烧结过程的有限元模拟  

FEM Simulation of Microwave Sintering Process for Powder Injection Molding Materials

作　　者：石建军[1,2] 成志强[1] GELIN J C 柳葆生[1] BARRIERE T 

机构地区：[1]西南交通大学力学与工程学院,成都610031 [2]Femto-ST研究所应用力学实验室,法国贝桑松25000

出　　处：《机械工程材料》2014年第11期84-89,共6页Materials For Mechanical Engineering

基　　金：教育部博士点基金资助项目(20110184110017)

摘　　要：基于传统电阻加热烧结过程的建模与模拟,通过对粉末注射成形材料微波烧结过程的机理分析,结合电磁场、热力学以及连续介质力学原理,确定了微波烧结全过程的数学模型和模拟方法;通过建立合理的力学模型和控制方程,采用COMSOL Multi-physics软件模拟微波烧结过程,并将模拟结果与试验结果进行了对比。结果表明:氧化锆粉末成形件在微波烧结初始阶段加热缓慢,当温度升至400℃之后,成形件内部温度持续急剧升高;当加热至1 360℃时,烧结件的相对密度高达92%,可满足粉末烧结工艺要求;建立的数学模型能有效模拟微波烧结过程中粉末成形材料内部的电场、温度场分布以及密度的衍化过程。Based on modeling and simulation on traditional resistant heating sintering,through analyzing the microwave sintering mechanism of powder injection molding materials,and together with the principles of electromagnetic fields,thermodynamics and continuum mechanics,the mathematical models and simulation methods for describing microwave sintering process were determined.By means of a reasonable mathematical model and governing equations,the microwave sintering process was simulated in the platform of finite element software COMSOL Multi-physics.The simulation results were compared with experimental ones.The results indicate that zirconia powder molding sample was heated slowly in the initial stage until temperature up to 400 ℃,and then temperature increased dramatically.When heated to the peak temperature of 1 360 ℃,the relative density of the sintered sample was up to 92%,which satisfied the requirement for powder sintering.The built mathematical model is conformed to be valuable to simulate the evolution of electric field,temperature field and the densification process of powder molding materials during microwave sintering.

关 键 词：微波烧结 有限元模拟 多物理场 粉末注射成形(PIM) 

分 类 号：TH164[机械工程—机械制造及自动化]