Diffusion Bonding of Alunmina Ceramic and Austentic Stainless Steel

Abstract

Ceramics are drawing more attention as materials for engineering devices having better heat resistance , abrasion resistance and corrosion resistance than metals. In many structural applications , specific characteristics of the ceramics have led to their selection for critical components forming parts of a total system that is largely metallic, and therefore depend for their success on the fabricator being able to form ceramic/steel joints of adequate quality [1]. Among the many techniques employed to join ceramics to steel, ranging from fusion welding to mechanical attachment, active metal brazing and diffusion bonding are g e n e rally preferred [2], Application s of diffusion bonding have been increased since materials difficult to be fusion -welded , including combination of different kinds of material, are possible to be joined and precise fabrications of complex shapes of components are possible. Diffusion bonding Involves the creation of a solid-state bond by interdiffusion across the interface between the two materials. However, the bonding parameters such as temperature, time and pressure have to be controlled for the formation of a reliable diffusion bonded joint [3].