Basically, brazing is a process that combines elements with the use of a brazing material. Prepared elements with applied brazing material are placed in a vacuum furnace and heated up to brazing temperature (from 800 to 1150°C) which is higher than the liquidus temperature. At this temperature, the parts are held for a short time (10 min) and then are slowly cooled to solidus temperature. This also allows for the joining of different materials like for example ceramic to steel.
During the process, the appropriate level of vacuum needs to be kept. Brazing in a vacuum furnace can also take place in a protective atmosphere, most often an argon atmosphere.