铝合金表面液态钎料声致铺展前沿氧化膜行为的研究

Oxidation behavior at the frontier of ultrasonic- induced solder spreading on the aluminum alloy surface

摘要:

超声波钎焊技术始于上世纪30年代末,它无需钎剂即可实现铝合金、铝基复合材料、钛合金、陶瓷等难润湿材料的连接,被普遍认为是替代钎剂钎焊最有前途的方法。钎料/母材润湿界面氧化膜的去除是超声波钎焊中的一个主要问题,氧化膜的残留将严重影响钎焊质量。本文针对铝合金表面液态钎料声致铺展前沿往往存在氧化膜残留的问题,采用实验与模拟相结合的方法分析了氧化膜残留的特征、原因,并提出相应的消除措施。本文的研究工作对提高超声波涂覆、表面金属化以及超声波钎焊的质量具有重要意义。

Abstract:

Ultrasonic soldering technology, which commenced in the late 30s of last century, has been used to successfully join aluminum alloy, aluminum matrix composites, titanium alloy, ceramics and other hard to wetting materials without the assistance of flux. It is widely regarded as the most promising alternative to the flux-assisted soldering. Removing the oxide film at the interface of solder/base material is one of the most important problems for the ultrasonic soldering process. In the light of the presence of residual oxide film at the frontier of acoustic-induced solder spreading on the aluminum alloy, combined experimental and simulation analysis work was conducted to discover the characteristics and formation of the residual oxide film. Meanwhile, the elimination measure for the oxide residues was put forward. The results are of great significance to improve the quality of the ultrasonic-assisted coating, surface metallization and ultrasonic soldering.