Microstructure and mechanical properties of Al2O3/Cu joints brazed with Ag–Cu–Ti+Zn composite fillers
Microstructure and mechanical properties of Al2O3/Cu joints brazed with Ag–Cu–Ti+Zn composite fillers
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DOI：
10.1016/j.ceramint.2022.03.125
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发表时间：
2022-03
影响因子：
5.2
通讯作者：
Binbin Fan;Jingkun Xu;Huicong Lei;Lin Zhao;Di An;Zhipeng Xie-
中科院分区：
文献类型：
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作者：
Binbin Fan;Jingkun Xu;Huicong Lei;Lin Zhao;Di An;Zhipeng Xie-
本研究采用新设计的Ag-Cu-Ti (ABA)+Zn复合钎料钎焊al2o3陶瓷和Cu棒。对钎焊接头微观结构的系统分析表明，钎焊过程中Zn原子的挥发可促进液态钎焊填料在al2o3陶瓷表面的扩散，形成均匀的枝晶界面结构。界面结构为Al2O3/TiO/(Cu, Al) 3ti30 +Ag(s, s)/Cu界面。在900℃下，添加ABA+Zn复合钎料的Al2O3/Cu接头的抗拉强度达到20.89 MPa，比未添加Zn的钎焊试样的抗拉强度提高约67.6%。在这种情况下，断裂模型在al2o3陶瓷内部呈直线和锐角。此外，随着钎焊温度从900℃升高到940℃，接头强度降低。
In this study, Al2O3ceramic and Cu bars were brazed with newly designed Ag–Cu–Ti(ABA)+Zn composite fillers. Systematic analysis of the microstructure of the brazed joints indicated that the volatilization of Zn atoms during the brazing process could promote the spreading of liquid brazing fillers on the surface of the Al2O3ceramic, resulting in a uniform dendritic interfacial structure. The typical interfacial structure was an Al2O3/TiO/(Cu, Al)3Ti3O+Ag(s, s)/Cu interface. Notably, the tensile strength was improved to 20.89 MPa for Al2O3/Cu joint brazed with ABA+Zn composite fillers at 900 °C for 20 min, approximately 67.6% higher than the sample brazed without Zn foil. In this case, the fracture model was straight and sharp-angled inside the Al2O3ceramic. In addition, the joint strength decreased with increased brazing temperatures from 900 to 940 °C.