Study on the correlation between spreadability and wetting driving force of Ni-GNSs reinforced SnAgCuRE composite solder

Materials & Design

Keke Zhang¹  Bingying Wang²  Yongjin Wu³  Huigai Wang⁴ 

[1] Collaborative Innovation Center of Nonferrous Metals, Henan Key Laboratory of Nonferrous Materials Science &Corresponding authors at: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China.;Processing Technology, Luoyang 471000, China;School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China;

关键词: Ni-GNSs/SnAgCuRE composite solder;    Wetting characteristics;    Spreadability;    Wetting driving force;    Correlation;   

DOI  :  

来源: DOAJ

【 摘 要 】

To save test time and cost, spreading area method and wetting balance method were used to study the wetting characteristics of Ni-GNSs/SnAgCuRE composite solder under different parameters and explore the correlation between spreadability and wetting driving force of the composite solder. The results showed that the composite solder had good spreadability on the Cu substrate under 270–280 °C and water-clean flux, and they had good wetting adaptability to Cu wire under the tin bath temperature of 270–280 °C, dipping time of 6 s and dipping speed of 20 mm/s. The results satisfied the requirements of production in micro-connection field. The dynamic spreading processes of Ni-GNSs/SnAgCuRE composite solder consisted of three stages: initial slow shrinkage, rapid expansion and gradual equilibrium. Added appropriate amount of Ni-GNSs into the solder alloy, they adsorbed on the surface of Ag3Sn particles to form a precursor film at the three-phase interface, which was conducive to spread. The correlation equation between spreadability and wetting driving force of composite solder was established. According to the spreading area of the composite solder on the Cu substrate, the wetting driving force and wetting balance of the immersion wetting processes could be analyzed and vice versa.

【 授权许可】

Unknown