The join is formed by the transfer of material across the interfaces. Since the diffusion rates are strongly temperature-dependent, the joining process is performed at approx. 50% to 90% of the melting temperature of the materials to be joined.
With holding times of sufficient duration, diffusion processes that coincide with grain growth cause residual pores in the joint to close, ideally resulting in the complete “healing” of the joint seam. The result is a monolithic component with no discernible joint (microscopic and macroscopic).
Individual factors such as the pressing force and the holding time at working temperature can vary strongly from material to material and therefore require comprehensive metallurgic expertise when it comes to deriving the appropriate process parameters. Get in touch with us, and we can advise you in detail and identify the process that’s right for you in our Innovation Lab.