The effect of composition and thickness of buffer on joining strength of brazing

ZrO sub 2 and 40Cr steel were brazed by inserting buffer Ni, 4J33, Ti and Cu separately. The chemical composition of 4J33 and Ni will damage the wetting property of Ag sub 66 Cu sub 30 Ti sub 4 filler metal to ceramic and hinder the interface reaction between the active filler metal and ZrO sub 2 , so ZrO sub 2 /40Cr steel can not be bonded. Copper and titanium can efficiently release the residual stresses in the ceramic without injuring the wettability of filler metal, so the high joining strength can be obtained by inserting Cu and Ti.