在Al侧钎缝界面Al元素在铝基体中与钎料进行了充分扩散，而Cu元素在Al中表现为长程扩散，Cu元素的扩散程度明显低于Al元素。Al元素在界面及钎缝中主要以团状分布，而Cu元素在界面及钎缝中主要以骨骼状及细针状分布。

At the Al side brazing joint interface, Al element fully diffuses with the brazing filler metal in the aluminum matrix, while Cu element shows long-range diffusion in Al, and the diffusion degree of Cu element is significantly lower than that of Al element. The Al element is mainly distributed in the form of clusters in the interface and the brazing seam, while the Cu element is mainly distributed in the form of skeletal and fine needles in the interface and the brazing seam.