Ceramic-to-metal welding by a pressurized combustion reaction

A new method of ceramic-to-metal welding has been developed using a pressurized combustion reaction to form Mo—TiB₂—Mo and Mo—TiC—Mo couples. Mixtures of Ti powder with B or C between Mo disks were electrically ignited under 3 GPa pressure. The exothermic reaction of the powders resulted in the formation of TiB₂ and TiC and reaction with Mo at the metal interface. Weld strengths of the Mo—TiB2—Mo and Mo—TiC—Mo couples were 20—40 MPa and ∼ 10 MPa, respectively.