IN283409: A novel process for brazing of copper impregnated graphite with other materials

The invention relates to a process for brazing of copper-impregnated graphite with self and with other materials like copper, monel, nickel, kovar, and metallised alumina. The present invention provides a relatively simpler and low temperature (<1000°C) brazing of copper-impregnated graphite DFP-1C graphite with other materials using Ag-Cu eutectic brazing alloy (779°C) in paste form, in atmosphere of H2:N2 mixture in the ratio of 8:92. The process is particularly useful for brazing collector electrodes in the multi stage depressed collector assembly of a TWT, with the high voltage metallized alumina insulators and also with self.