JOINING METHOD OF SI3N4 CERAMIC SINTERED BODY

摘要

The present invention is to provide a method for bonding silicon nitride ceramics to each other, the conventional silicon nitride ceramic sintered body is subjected to hot isostatic pressure using argon gas pressure to a few μm size on the surface and grain boundaries of the ceramic particles located on the ceramic surface layer By forming a fine pore layer to have a path for the binder to penetrate into the pores, while having a chemical adhesion and physical adhesion, molybdenum (Mo) or niobium (Nb) having a thermal expansion coefficient relatively similar to silicon nitride By using the as an interlayer material together with the bonding agent, the bonding treatment can be used to obtain a better product than the conventional bonded silicon nitride ceramics.