Method for closing an orifice of a silicon carbide-based container

A method for closing an orifice of a container, the method comprising, in order:

• a) providing a silicon carbide-based container comprising a cavity that is open by an orifice, of a silicon carbide-based plug, and of a brazing material borne by the plug and/or the container, a solid object being housed in the cavity,
• b) brazing the plug onto the container to close the orifice, the brazing comprising melting of the brazing material by heating to a temperature greater than the melting temperature of the brazing material, followed by solidification of the brazing material so as to form a solid joint between the container and the plug, at least a part of the cavity, referred to as a cold part, in which the solid object is housed, being kept at a temperature lower than the degradation temperature of the solid object during the brazing,
• the brazing further comprising cooling of the cold part by a cooling system extending along at least a portion of the cold part, the portion of the cold part comprising an end of the cold part adjacent to a heating zone for the brazing material.