AgPd/BZn复合材料贵金属表面控制技术

摘要

通过形貌观察和成分测试等方法对AgPd/BZn复合材料AgPd表面和断面进行了分析,证明AgPd表面色泽偏暗和出现“鱼鳞”特征的主要原因是Zn的沉积和不均匀分布.据此采取了基带镀Ni以防止Zn挥发的改进措施,使AgPd表面Zn含量降低1/3,显示银灰色,并消除了“鱼鳞”特征.%The surface and cross-section morphology and composition of AgPd layer in AgPd/BZn composites were investigated. It shows that the dark colour and "fish scale" morphology of the AgPd surface is caused by the deposition of Zn and its heterogeneous distribution, respectively. Therefore, the base strip BZn was Ni plated to prevent Zinc from vaporizing during heating. The Zn content was decreased by 1/3. The AgPd surface looked silver grey in colour,and the "fish scale" morphology disappeared.