多元铜基活性钎料对c-BN的润湿性与微观组织

Wettability and microstructure of multicomponent Cu-based active filler metal on c-BN

摘要: 采用座滴法试验研究了多元铜基活性钎料中Ti,Zr活性元素对c-BN润湿性的影响,借助于扫描电镜(SEM)、能谱分析仪(EDS)和X射线衍射仪(XRD),结合键参数理论分析探讨了多元铜基活性钎料的微观组织,发现钎料主要由Cu固溶体、富Sn相和少量金属间化合物组成.通过计算元素间化学亲和力大小,进一步阐述了多元铜基活性钎料中Ti,Zr活性元素对c-BN润湿性的影响机制.结果表明,多元铜基活性钎料中,添加Ti活性元素比Zr元素更容易润湿c-BN。

Abstract: By using the sessile drop method, the effects of active elements Ti and Zr on the wettability of the multicomponent Cu-based active filler metal on c-BN were studied.With the help of SEM, EDS and XRD, on basis of the key parameters theory, microstructure of the multicomponent Cu-based active filler metal were discussed.It can be found that the filler metal mainly consisted of Cu solid solution, Sn-rich phase as well as a small amount of intermetallic compound.By calculating the relation among the chemical affinity of elements, the influence mechanism of the wettability of the active element Ti, Zr in the multicomponent Cu-based active filler metal on c-BN was further elaborated.The results showed that the wettability of CuNiSnTi active filler metal on c-BN is better than CuNiSnZr.