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表面擴散機制下非等徑金屬粉末燒結過程的數值模擬研究
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中南大學 數學與統(tǒng)計學院,中南大學 數學與統(tǒng)計學院,中南大學機電工程學院,西北有色金屬研究院 金屬多孔材料國家重點實驗室,西北有色金屬研究院 金屬多孔材料國家重點實驗室

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TG111.6

基金項目:

國家自然科學基金項目（面上項目，重點項目，重大項目）;國家重點基礎研究發(fā)展計劃（973計劃）;金屬多孔材料國家重點實驗室開 放基金項目；中南大學研究生創(chuàng)新項目


The numerical simulation of non-equal sintering metal powders by surface diffusion
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Affiliation:

School of Mathematics and Statistics,Central South University,Changsha,School of Mathematics and Statistics,Central South University,Changsha,School of Mechanical and Electrical Engineering,Central South University,Changsha,State Key Laboratory of Porous Metal Materials,Northwest Institute for Nonferrous Metal Research,Xi’an,State Key Laboratory of Porous Metal Materials,Northwest Institute for Nonferrous Metal Research,Xi’an

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan);The National Basic Research Program of China (973 Program);The National Key Laboratory Open Program of Porous metal material of China;Innovation Project of Central South University

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    摘要:

    本文主要進行的是表面擴散機制下非等徑金屬粉末燒結過程的數值模擬研究。為了準確地描述非等徑金屬粉末的燒結過程,對表面擴散模型建立了更加合適的初邊值條件,并用有限差分法對該模型進行數值求解,實現了半徑比為1:1、1:1.5、1:2的非等徑金屬粉末燒結過程的二維及三維數值模擬。此外,非等徑金屬粉末燒結過程的數值模擬結果與實驗結果吻合較好。最后,分析了非等徑金屬粉末的半徑比對燒結頸半徑生長速度的影響,數值結果表明：隨著金屬粉末半徑比的減小,頸半徑生長速度逐漸變快。

    Abstract:

    This paper focuses on the numerical simulation of non-equal sintering metal powers by surface diffusion. In order to simulate the sintering process of non-equal metal powders clearly, the surface diffusion model is modified by establishing more suitable initial boundary conditions. And this model is numerically solved by the finite difference method. The three-dimensional numerical simulations of two metal powers with radii ratios 1:1, 1:1.5, 1:2 are implemented by this model. Through comparison, the simulation results are consistent with the experimental ones. Finally, the effect of metal powders’ radii ratios on the growth rate of sintering neck is investigated, which implies that the sintering neck radius increases with the decreasing of radii ratios.

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引用本文

宋敏,鄭洲順,諶東東,湯慧萍,王建忠.表面擴散機制下非等徑金屬粉末燒結過程的數值模擬研究[J].稀有金屬材料與工程,2017,46(10):2842~2846.[Song Min, Zheng Zhoushun, Chen Dongdong, Tang Huiping, Wang Jianzhong. The numerical simulation of non-equal sintering metal powders by surface diffusion[J]. Rare Metal Materials and Engineering,2017,46(10):2842~2846.]
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  • 收稿日期:2016-06-28
  • 最后修改日期:2017-01-08
  • 錄用日期:2017-02-28
  • 在線發(fā)布日期: 2017-12-01
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