形状因子对微观定向结构<strong>Cu-W</strong>复合材料触头的力学和电学性能的影响

doi:10.11901/1005.3093.2021.379

材料研究学报

2022, Vol. 36

Issue (8): 571-578 DOI: 10.11901/1005.3093.2021.379

研究论文

本期目录 | 过刊浏览

形状因子对微观定向结构Cu-W复合材料触头的力学和电学性能的影响

韩颖¹(

), 李思达¹, 曹云东¹, 李述军²(

), 陆艳君³, 孙宝玉⁴

^1.沈阳工业大学电气工程学院沈阳 110870
^2.中国科学院金属研究所沈阳 110016
^3.沈阳芯源微电子设备股份有限公司沈阳 110168
^4.沈阳中北通磁科技股份有限公司技术中心沈阳 110159

Influence of Shape Factor on Mechanical and Electrical Properties of Cu-W Composites with Micro-oriented Structure

HAN Ying¹(

), LI Sida¹, CAO Yundong¹, LI Shujun²(

), LU Yanjun³, SUN Baoyu⁴

^1.School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
^2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.KINGSEMI Co. Ltd., Shenyang 110168, China
^4.Shenyang General Magnetic Co. Ltd., Shenyang 110159, China

引用本文:

韩颖, 李思达, 曹云东, 李述军, 陆艳君, 孙宝玉. 形状因子对微观定向结构Cu-W复合材料触头的力学和电学性能的影响[J]. 材料研究学报, 2022, 36(8): 571-578.
Ying HAN, Sida LI, Yundong CAO, Shujun LI, Yanjun LU, Baoyu SUN. Influence of Shape Factor on Mechanical and Electrical Properties of Cu-W Composites with Micro-oriented Structure[J]. Chinese Journal of Materials Research, 2022, 36(8): 571-578.

全文: PDF(7438 KB) HTML

摘要:

设计了三种微观定向结构的Cu-W复合电触头材料,用差异显著的形状因子对其表征,研究了形状因子对其导电性能和力学性能的影响。基于有效介质方程(GEM)和导电通道理论并结合仿真计算,得到不同骨架结构复合材料的电流密度分布及其与形状因子的关系。结果表明,形状因子F越接近1导电通道越容易形成团簇,导电性能越好；基于Mises屈服准则计算力学性能,仿真分析了不同结构复合材料的形变特性,提出其力学性能与形状因子的关系,即随着形状因子圆形度的增大力传导微元的稳定性随之提高；形状因子的圆形度越大,力传导微元越不易发生变形,机械性能越好。根据Cu-W复合电触头材料的导电性能和力学特性,可进一步优化其综合性能。

关键词 ：复合材料, 微观定向结构, 导电性能, 力学特性, 形状因子

Abstract：

Electrical contact Cu-W composites with three different micro-directional structure was designed, and characterized in terms of different shape factors. Then the influence of shape factors on their electrical conductivity and mechanical properties was investigated. Based on effective medium equation (GEM), conductive channel theory and simulation calculation, the current density distribution, and its relationship with the shape factor of composites with different skeleton structures were acquired. The results show that the closer the shape factor F to 1 is, the easier the formation of the cluster-like conductive channels are, thereby the better the conductivity is. The deformation characteristics of different composite materials were simulated and analyzed according to the Mises yield criterion, while the relationship between mechanical properties and shape factor was proposed, that is, with the increase of roundness of shape factor, the stability of force conduction element was improved. The larger the roundness of the shape factor is, the less deformation of the force conduction element is and the better the mechanical properties are. In a word, the comprehensive properties of the electrical contact Cu-W composite material can be further optimized by adjusting appropriately its conductivity and mechanical properties.

Key words： composite micro-oriented structure electrical and mechanical properties shape factor

收稿日期: 2021-06-24

ZTFLH:

TG146.1

基金资助:国家自然科学基金(51977132);辽宁省自然科学基金(2019-MS-249);辽宁省自然科学基金(LACT-007);重点实验室装备预先研究基金(6142A03203002)

作者简介: 韩颖,女,1979年生,副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.379 或 https://www.cjmr.org/CN/Y2022/V36/I8/571

图1 具有三角形、四边形和六边形形貌导电单元的Cu-W复合材料的有序排列

图2 纯Cu和纯W的应力应变曲线

图3 三角形、四边形、六边形形貌导电单元的电流密度

图4 三角形、四边形、六边形形貌导电单元电流的走势(整体以及局部放大图)

图5 不同内部结构电流密度的积分

图6 简化电阻单元模型

图7 三种形貌的单元电阻模型

图8 单位面积的三种结构形状因子示意图

图9 三角形、四边形、六边形的力传导微元Cu-W复合材料的应力应变云图

400 MPa	Triangle	Quadrilateral	Hexagon
Stress/MPa	$1.792 × 103$	$1.600 × 103$	$1.491 × 103$
Strain/mm	$1.416 × 10 - 2$	$1.353 × 10 - 2$	$1.312 × 10 - 2$

表1 400 MPa应力、应变值

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