Corrosion can affect the service life and reliability of electronic devices, in addition, corrosion products may flow out with sweat and enter the body through skin. In the current study, mechanical and biological corrosion experiments were performed to explore the mechanical properties and secondary biological hazards of nano-silver paste in the corrosive environment. The effects of corrosion time on shear strength and corrosion products of sintered nano-silver joints on biological organism were investigated. The survival rate of hamster lung cells was measured by MTT assay and flow cytometry after cultured in nutrient solution containing different concentration of nano-silver particles. Experimental analysis reveals that the shear strength of sintered nano-silver joint decreases drastically with the increasing of corrosion time, and the fracture mode changes from interlayer to interfacial fracture. A modified Weibull statistical model was proposed to predict the average failure strength and probability of sintered nano-silver joints at different corrosion time. In addition, biological experiment demonstrates that with increasing of nano-silver particles concentration, the survival rate of hamster lung cells firstly increases and then decreases.

腐蚀会影响电子设备的使用寿命和可靠性，此外，腐蚀产物可能会随着汗水流出并通过皮肤进入人体。在当前的研究中，进行了机械和生物腐蚀实验，以探索在腐蚀环境中纳米银浆的机械性能和次生生物危害。研究了腐蚀时间对烧结纳米银接头对生物的剪切强度和腐蚀产物的影响。在含有不同浓度的纳米银颗粒的营养液中培养后，通过MTT法和流式细胞仪测量仓鼠肺细胞的存活率。实验分析表明，纳米银烧结接头的剪切强度随着腐蚀时间的增加而急剧下降，断裂模式从层间转变为界面断裂。提出了一种改进的威布尔统计模型，以预测平均腐蚀强度和在不同腐蚀时间下烧结纳米银接头的概率。另外，生物学实验表明，随着纳米银颗粒浓度的增加，仓鼠肺细胞的存活率先升高后降低。