设计并采用Zn-Al-Ti系列钎料对Cu和Al异种金属实施了钎焊,并对Zn-22Al-xTi/Cu界面处的相组成和金属间化合物形貌进行了分析.结果表明:在Zn-22Al中添加0.01％至0.05％的Ti可以显著细化钎料组织,而且Zn-22Al-0.03Ti在Cu基板上的铺展面积比Zn-22Al高出60.4％,但Ti的添加会提高Zn-22Al钎料的熔点和熔化区间.另外,在钎料中添加微量的Ti可以优化Cu/Al接头中Cu侧界面化合物的组织并减小其厚度.相比Zn-22Al钎料,Zn-22Al-0.03Ti钎焊所得Cu/Al接头强度要高出13.4％,而且接头断裂位置由化合物层转移至钎料内部.X射线衍射结果显示,钎焊过程中有CuAl2,Cu9Al4,CuZn 3种化合物产生于钎料与Cu基板界面处.
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