Structure and property analysis of brazing interface of domestic ceramic and stainless steel

Domestic ceramics have been chemically plated nickel and the brazing of ceramics plated nickel with 1Cr18Ni9Ti stainless steel was realized. Interfacial structures and properties of ceramic/Ni/Sn-3.5Ag/stainless steel joint in atmosphere were analyzed by some test methods such as scanning electron microscopy (SEM), energy distribution spectrometer (EDS), X-ray diffraction (XRD), shear stress test and so on. The results show that the joint of chemical plated nickel ceramics with 1Cr18Ni9Ti stainless steel is a multilayer compound structure. Plated nickel layer generated interfacial reaction with tin based solder and the productions of interface reaction are Ni₃Sn₄ intermetallic compound and tin base solution. Shear strengthen of the joint is up to 15.7 MPa when soldering temperature and time are 300°C and 5 min respectively. This method is low cost and convenient for batch production. Thus, it broadens the use range of domestic ceramics and has certain applied value.