3. Test results and discussion Figure 1 Ag24Cu43Zn33 solder joint 10 × Figure 2 Pd20Ag5Mn75 solder joint 23 × Figure 3 Ag71Cu28Ni1 solder joint 120 × Figure 4 In/Au/In composite solder joint 120 × Figure 5 AuIn solder joint 20 × Previous Next EV LIGHT Guangzhou Co., Ltd , https://www.evlightpro.com
(1) Selection results of the weld metallurgical etchant composed of the test solder alloy and different base materials are shown in Table 2, and the metallographic structure prepared by the above etching method is shown in Figs. 1 to 5 . The test results show that the metallographic structure of the brazed joint can be obtained by the chemical etching method selected in this test. 
