基于微观定向骨架结构Cu-W复合电触头材料的静熔焊性能  

Investigation on Static Fusion Welding Performance of Cu-W Composite with Microscopically Oriented Skeleton Structures

作　　者：韩颖[1] 秦杰 曹云东[1] 李述军[2] HAN Ying;QIN Jie;CAO Yundong;LI Shujun(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[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

出　　处：《材料研究学报》2022年第10期769-776,共8页Chinese Journal of Materials Research

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

摘　　要：设计了四边形、六边形和菱形十二面体微观定向骨架结构的Cu-W复合材料,研究其静熔焊性能并与无序骨架结构的Cu-W复合材料对比。根据流体力学理论,用有限元法分析不同时刻几种微观结构复合材料的温度和传导热通量并计算了导热系数。结果表明,具有微观定向骨架结构的Cu-W复合材料其接触电阻更低和更稳定,其中菱形十二面体骨架结构复合材料的接触电阻最小且更易形成导热链,更大程度地降低了区域热阻。根据马兰戈尼效应比较了不同微观结构复合材料的熔池形态,发现Cu、W两相材料规则的排列分布使其静熔焊侵蚀的范围明显减小,菱形十二面体骨架复合材料的侵蚀程度最低。The Cu-W composites with three different microstructures,namely quadrilateral,hexagonal and rhomboidal microdirectional skeleton structure were designed and prepared,and their static welding properties were investigated,by taking the Cu-W composites with disordered skeleton structure as comparison.According to the principle of fluid mechanics,the variation of temperature and conduction heat flux for composites of various macrostructures with time were analyzed by means of finite element method,and their thermal conductivity was calculated.The results show that the contact resistance of CuW composites with microscopically oriented skeleton structure is lower and more stable,among others,the composite with rhombic dodecahedral skeleton has the lowest contact resistance,and where may exist a heat conducting chain,and even an uniformly distributed heat conducting network,which reduces the regional thermal resistance to a greater extent.According to the Marangoni effect,the molten pool morphology of the composites with different microstructures is compared,and it is found that the regular distribution of Cu and W two-phase materials can facilitate the reduction of the size of aggressed area induced by the static fusion welding,accordingly the rhomboidal dodecahedron matrix composites have the lowest aggressed area.

关 键 词：复合材料 微观定向结构 静熔焊 接触电阻 熔化相变 

分 类 号：TG146.1[一般工业技术—材料科学与工程]