论文:2012,Vol:30,Issue(2):234-238
引用本文:
刘亮亮, 高峰, 胡国辛, 刘江南. 相场法模拟烧结后期陶瓷晶粒生长及气孔组织演化研究[J]. 西北工业大学
Liu Liangliang, Gao Feng, Hu Guoxin, Liu Jiangnan. Simulating Effects of Pores on Grain Growth during Final Stage of Sintering in Ceramics through Phase Field Modeling[J]. Northwestern polytechnical university

相场法模拟烧结后期陶瓷晶粒生长及气孔组织演化研究
刘亮亮1, 高峰1, 胡国辛1, 刘江南1,2
1. 西北工业大学 材料学院,陕西 西安 710072;
2. 西安工程大学,陕西 西安 710048
摘要:
采用相场模型模拟了烧结后期陶瓷微观组织演化过程。在二维模拟系统中分别设置不同大小、含量以及数量的气孔,分析了气孔的脱钩现象,研究了烧结后期气孔对陶瓷晶粒生长动力学的影响规律。模拟结果表明,陶瓷晶粒尺寸与气孔率和气孔数量成反比,与气孔尺寸成正比。
关键词:    相场法    烧结    气孔    晶界   
Simulating Effects of Pores on Grain Growth during Final Stage of Sintering in Ceramics through Phase Field Modeling
Liu Liangliang1, Gao Feng1, Hu Guoxin1, Liu Jiangnan1,2
1. Department of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072 China;
2. Xi' an Polytechnic University,Xi'an 710048,China
Abstract:
We use the phase field model to describe the microstructural evolution during the final stage of sintering.Sections 1 and 2 of the full paper explain the phase field model mentioned in the title. Section 1 presents the phasefield model; Fig. 1 in section 1 gives the schematic diagram for obtaining the order parameters across the grainboundaries and the pores. Section 2 presents the initial conditions for the simulation, which are given in Table 1;Fig. 2 shows the discretized shape of a pore for simulation; Fig. 3 shows the morphology of the initial microstructureof the sintering ceramics. Section 3 discusses the simulation results; their core consists of: (1) we set the parame-ters, different pore sizes and numbers of pores in a 2D simulation system; (2) we observe the entrapment of poresinside grains; (3) we analyze the effects of the pore of ceramics on grain growth kinetics during the final stage ofsintering; (4) the simulation results, given in Figs. 4 and 6, and their analysis show preliminarily that the grainsize is proportional to the pore size and the number of pores and inversely proportional to the porosity rate.
Key words:    analysis    ceramic materials    effects    grain boundaries    grain growth    initial value problems    micro-structure    models    numerical methods    porosity    scanning electron microscopy    simulation    sinte-ring;phase field model    pore size   
收稿日期: 2011-04-06     修回日期:
DOI:
基金项目: 航空科学基金(09G53063);西北工业大学基础研究基金(G9KY101902)资助
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作者简介: 刘亮亮(1985-),西北工业大学博士研究生,主要从事功能材料研究。
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