Reaction-tunable diffusion bonding to multilayered Cu mesh/ZK61 Mg foil composites with thermal conductivity and lightweight synergy  

作　　者：Fanjin Yao Guoqiang You Sheng Zeng Dashi Lu Yue Ming 

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China [2]National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044,China [3]The State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology at Shenzhen,Shenzhen 518055,China

出　　处：《Journal of Materials Science & Technology》2023年第8期10-22,共13页材料科学技术（英文版）

基　　金：This work was financially supported by the Research&De-velopment Projects in Key Areas in Guangdong Province(No.2020B010186002);the National Natural Science Foundation of China(No.U2037601);the Open Fund of Large Instruments(No.202103150177).

摘　　要：The thermal properties of Mg alloys require further optimization to encounter the increasingly severe heat dissipation demands of high-power densities and highly integrated electronic components.In this study,a novel strategy of reaction-tunable diffusion bonding(RDB)was applied to manipulate the inter-facial reaction in the multilayered Cu mesh/ZK61 Mg foil composites.The displacement of the punch was utilized to quantify the degree of reactive diffusion with adjustable,visible,and high flexibility.The inter-face was artificially manipulated to produce the fluid Mg-Zn eutectic liquid phase filling the interfacial gap at high temperature for a short time,followed by diffusion bonding at low temperature.The thermal conductivity of the composites first increased and then decreased,which was synthetically affected by the amelioration of metallurgical bonding and the moderately reactive consumption of Cu.The reinforcement Cu was converted from the Hasselman-Johnson model to the Rayleigh model,reflecting the optimization of the interfacial bonding quality.The composites with thermal conductivity and lightweight synergy were fabricated successfully.Therefore,RDB is a progressive technique,shedding lights on the innovative lightweight metal matrix composites with high thermal conductivities relevant to the 5G communications and new energy vehicle industries.

关 键 词：Metal-matrix composites(MMCs) Thermal properties Microstructures Reaction-tunable diffusion bonding 

分 类 号：TG146.22[一般工业技术—材料科学与工程]