Al/Cu扩散溶解层的形成机理研究Study on forming mechanism of Al/Cu diffusion solution zone
宋玉强,李世春,耿相英,杨睿
摘要(Abstract):
利用扫描电子显微镜和电子探针对不同退火处理的Al/Cu镶嵌式扩散偶扩散溶解层的形态和形成机理进行了研究。结果表明,当580℃保温160h退火处理后,在Al/Cu界面处形成厚度约2.5mm的扩散溶解层,其主要结构相与Al-Cu相图上相的排列位置一致。CuAl相层首先在Cu上形成,接着CuAl2在Al上形成,然后Cu4Al3、Cu5Al3、Cu3Al2、Cu9Al4和Cu3Al等五个相层依次在Cu上形成,各个扩散溶解层按照平面式长大方式长大;Al-Cu扩散溶解层的形成是Al和Cu固相扩散、溶解与二次结晶的结果,由于扩散浓度和固溶度的相互作用,导致了扩散溶解层析出的序列性。
关键词(KeyWords): 铝;铜;扩散焊;扩散;溶解;结晶
基金项目(Foundation): 国家自然科学基金资助项目(50371059);; 中国石油大学(华东)博士基金项目(Y070322)
作者(Author): 宋玉强,李世春,耿相英,杨睿
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