Abstract: A method for closing an orifice of a container. The method involves first 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 is housed in the cavity. Then the orifice is closed by brazing the plug onto the container. The brazing involves the melting 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, is kept at a temperature lower than the degradation temperature of the solid object during the brazing.

Abstract: A method for joining, by brazing, a first part and a second part, the steps of preparing at least one of the parts including the following: a) providing a part intended to be brazed, the part being made of carbon or based on titanium, nickel or a CoCr alloy, b) performing inert gas plasma treatment on the part whereby the part is cleaned and an active surface is formed on the part, c) depositing a first layer comprising an active element on the active surface of the part, the active element being a carbide-forming element, d) depositing a second layer of gold on the first layer, whereby the first layer is protected from oxidation and good wetting is ensured.