微米厚Al-Al薄膜的超声摩擦焊接技术

传统的摩擦焊接以块材为研究对象，本实验利用改进的超声摩擦焊接(UFW)技术对20～25μm厚的Al-Al薄膜进行连接。采用白光干涉仪、光学显微镜及扫描电镜对单体Al薄膜和连接成型组件中的Al薄膜进行了表面粗糙度、厚度一致性和界面分析。结果表明，利用UFW可实现微米量级Al薄膜间的精密连接。同时，利用改进的UFW一次成型获得了一种高质量的双台阶Al-Al薄膜器件。

Joining of AI-AI Micron Foils by Ultrasonic Friction Welding

The ultrasonic friction welding (UFW) method was employed to realize the joining of 20-25 μm thick Al-Al foils without the introduction of difference to parents materials, since the conventional UFW puts more focus on large scale of bulk metal materials. The monomer and post-joining Al foils were analyzed and compared including surface roughness, thickness uniformity, and interface characteristics by using white light interfere profiler (WLI), optical microscope (OM) and scanning electron microscope (SEM). The experimental results indicate that the high quality Al-Al foils components and one kind of Al-Al device are well prepared by our improved UFW.