三维三相纳米陶瓷刀具材料微观组织的相场法模拟  

Phase Field Simulation of Three-Phase Nano-Ceramic Tool Materials

作　　者：郝松[1,2] 黄传真[3,2] 邹斌[3,2] 刘含莲[3,2] 朱洪涛[3,2] 

机构地区：[1]山东大学机械工程学院先进射流工程技术研究中心,济南市250061 [2]山东大学高效洁净机械制造教育部重点实验室(山东大学) [3]山东大学

出　　处：《工具技术》2012年第3期8-12,共5页Tool Engineering

基　　金：国家自然科学基金(50975161;51005136);济南市高校自主创新计划(200906013)

摘　　要：建立了添加两种纳米颗粒的三相陶瓷刀具材料微观组织的相场法模拟模型,改进了三维尺度下的现有模拟算法,提出了一种更为有效的模拟算法,成功模拟了200×200×200单位的三相复合陶瓷刀具材料的微观组织演化过程,提高了计算效率。分别模拟了单相材料与三相纳米陶瓷刀具材料的微观组织演化过程。结果表明,添加纳米颗粒的三相纳米陶瓷刀具材料的晶粒尺寸分布峰值较小,说明纳米颗粒对晶界的钉扎效果明显,起到了较好的细化基体相晶粒的作用。A phase-field model of three-phase composite ceramic tool materials with two kinds of nano-particles is set up in this research.The three-dimensional simulation algorithm is modified and a new efficient algorithm is established.The microstructure evolution of three-phase nano-ceramic tool materials is more efficiently and successfully simulated in 200×200×200 unit size.Microstructure evolution of single-phase and three-phase ceramic tool materials is simulated respectively.It can be found that the peak value of grain size distribution for three-phase nano-ceramic tool material is smaller than average diameter.It indicates that the nano-particles not only restrain grain boundary migration,but also prevent the elimination of small grains and refine matrix grains.

关 键 词：相场法 计算机模拟 微观组织演化 纳米复合材料 

分 类 号：TG711[金属学及工艺—刀具与模具]