Ceramic-to-Metal Welding: How to Prevent Cracks Delamination
Ceramics possess the properties of heat resistance, insulation, wear resistance and corrosion resistance. They are suitable for use in high-temperature, vacuum and corrosive environments and are widely applied in semiconductors, optoelectronics and various industrial equipment. However, they cannot independently perform load-bearing, conductive and sealing operations and need to be assembled with metals. The difference in thermal expansion coefficients between the two is significant. After welding, stress cracking, interface separation and weak bonding force problems are prone to occur. To achieve a stable connection, it is necessary to select appropriate metal materials reasonably, along with compatible metalization treatment and welding processes. This article, based on actual application scenarios, sorts out material selection, welding processes and implementation suggestions to help optimize product design. I. Thermal expansion-matching metals: The best choice ...