Ceramic Diffusion Bonding

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.

Ceramic diffusion bonding.

In addition the influence of atmosphere mismatch in coefficient of thermal expansion between the joint members interlayers and surface structure are discussed. These include principal bonding parameters such as temperature time and pressure. The mechanism is solid state diffusion or more properly inter diffusion. It operates on the principle of solid state diffusion wherein the atoms of two solid metallic surfaces intersperse themselves over time.

Diffusion bonding is a solid state joining process capable of joining a wide range of metal and ceramic combinations to produce both small and large components. This technique can similarly be used when joining ceramics to metals. The process is dependent on a number of parameters in particular time applied pressure bonding temperature and method of heat application. Diffusion bonding of ceramics to ceramics and to metals is reviewed with primary emphasis on the effects of operational variables on joint strength.

Direct diffusion bonding of ceramic to ceramic would be slow.