Ceramic Diffusion Bonding

Direct diffusion bonding of ceramic to ceramic would be slow.

Ceramic diffusion bonding. It operates on the principle of solid state diffusion wherein the atoms of two solid metallic surfaces intersperse themselves over time. These include principal bonding parameters such as temperature time and pressure. In addition a number of ceramic materials al2o3 ni3al si3n4 sialon tic wc and zro2 were bonded to 304 and 316 stainless steel using diffusion bonding or tlp bonding. In addition the influence of atmosphere mismatch in coefficient of thermal expansion between the joint members interlayers and surface structure are discussed.

This technique can similarly be used when joining ceramics to metals. However the process can be facilitated by interposing a metallic or glassy interlayer between the two substrates. The mechanism is solid state diffusion or more properly inter diffusion. Diffusion bonding of ceramic materials is usually a direct joining method that accomplishes joining between two often like materials through atomic level mass transport and exchange.

Diffusion bonding of ceramics to ceramics and to metals is reviewed with primary emphasis on the effects of operational variables on joint strength.