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Diffusion welding is one of the exclusive welding methods that provides a perfect material interface after joining of different materials and results in high mechanical properties at high temperatures. In particular, this technique can be used for joining porcelain and metal that have distinctly different features. In this study, diffusion welding of copper to porcelain has been investigated. After the diffusion welding with different parameters, shear tests have been applied to the samples in order to investigate the weld properties and the changes in hardness in the weld region. In order to elucidate the changes in microstructure and composition in the weld region, SEM, EDX and XRD analyses were performed on the samples. As a result, the joining of copper and porcelain materials can successfully be performed by diffusion welding. Samples have the highest weld strength, if they are joined by diffusion welding at 900 °C for 60 min and at 4.5 MPa.

Analyzing the diffusion weldability of copper and porcelain