| 金刚石/铜复合材料传热数值模拟 |
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| 引用本文： | 桂思农,董应虎,张笑怡,李佳航.金刚石/铜复合材料传热数值模拟[J].科技广场,2014(6):15-19. |
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| 作者姓名： | 桂思农 董应虎 张笑怡 李佳航 |
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| 作者单位： | 南昌航空大学材料科学与工程学院; |
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| 摘 要： | 本文采用有限元方法对金刚石/铜复合材料的传热性进行数值模拟,建立多颗粒二维随机分布复合材料测试模型,研究金刚石颗粒体积分数、颗粒半径、颗粒形貌、粒径比及界面因素对金刚石/铜复合材料传热性能的影响规律及机制。结果表明:金刚石/铜复合材料的热导率随着金刚石体积分数的增大而升高;热导率随着粒径的增大而呈现先升高后降低的规律;方形金刚石颗粒的复合材料热导率高于球形颗粒的复合材料;在金刚石体积分数一定时,适量配比细颗粒可提高材料热导率;对金刚石表面镀覆层新物质(W、Cr、Ti)来等效金刚石和铜二者物理结合时的界面热阻。
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| 关 键 词： | 铜基复合材料 金刚石颗粒 热导率 有限元分析法 |
Numerical Simulation of Thermal Conductivity of Diamond/Copper Composites |
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| Gui Sinong,Dong Yinghu,Zhang Xiaoyi,Li Jiahang.Numerical Simulation of Thermal Conductivity of Diamond/Copper Composites[J].Science Mosaic,2014(6):15-19. |
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| Authors: | Gui Sinong Dong Yinghu Zhang Xiaoyi Li Jiahang |
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| Institution: | ( School of Materials Science and Engineering, Nanchang Hangkong University, Jiangxi Nanchang 330063 ) |
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| Abstract: | This paper, by using finite element method, simulating the thermal conductivity of diamond/copper composites, establishes the multi-particle random distribution models of composites in two dimension, and re-searches the effect and mechanism of factors such as diamond particle volume fraction, particle diameter, particle shape, different proportions of particle size and the boundary of particle and matrix on thermal conductivity of dia-mond/copper composites. The results show that thermal conductivity of diamond/copper composites increases with the increasing of diamond volume fraction. Thermal conductivity of the composites rises first and then reduces with the increasing of particle diameter. Thermal conductivity of the composites with square particle is higher than that of the composites with sphere particle;In a certain amount of diamond particle volume fraction, refining grain size properly can increase thermal conductivity;Equivalent thermal boundary resistance through plating a layer of third phase between diamond and copper such as W, Cr, Ti. |
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| Keywords: | Copper matrix Composites Diamond Particle Thermal Conductivity Finite Element Method |
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