Brazing is a metallurgical process for joining metals, by melting a filler metal to form a metallic bond between two identical materials or several parts of different types, as metal-to-metal, metal-to-ceramic or glass-to-metal sealing. 

Various metals can be brazed: silver, copper, steels, precious metals (gold, platinum, palladium), ceramics, carbides and diamond products. 

The temperature must therefore be higher than the melting temperature of the filler metal, but lower than that of the parts to be joined. During the brazing process, the filler metal flows into the gap between close-fitting parts by capillary action. 

The filler metal is brought slightly above its melting temperature while protected by a suitable atmosphere. It then flows over the base metal and is then cooled to join the work pieces together.

For optimum assembly quality, this process is carried out in very good atmospheric conditions, or under vacuum, with controlled temperature homogeneity. This guarantees the absence of oxidation, a decisive factor in obtaining top-quality brazing alloys.  

The brazing process is used for components in a variety of sectors :  automotive and aerospace components, medical devices, heat exchangers, electronics, etc…