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论文:2012,Vol:30,Issue(2):234-238 |
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引用本文: |
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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 |
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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 |
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相场法模拟烧结后期陶瓷晶粒生长及气孔组织演化研究 |
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刘亮亮1, 高峰1, 胡国辛1, 刘江南1,2 |
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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
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Simulating Effects of Pores on Grain Growth during Final Stage of Sintering in Ceramics through Phase Field Modeling |
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Liu Liangliang1, Gao Feng1, Hu Guoxin1, Liu Jiangnan1,2 |
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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
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收稿日期: 2011-04-06
修回日期:
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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 |
通讯作者:
Email: |
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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参考文献: |
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