1986 Volume 94 Issue 1095 Pages 1197-1200
An electric discharge method for welding ceramics has been developed. A joining material electrically conductive at high temperature is inserted between two pieces of ceramics to be joined, and the joint region is preheated by a pair of burners of spouting combustion gas. When the joint region is heated to high temperature, a high voltage is applied between a pair of electrodes combined with the burners. The ceramics are joined by electric discharge through gas flame and the joint region. Pressureless-sintered Si3N4 ceramics were joined using a mixture of kaolin and CaF2 as a joining material. Ceramics can be joined easily, in a short time, and economically by this method.
