Abstract: A process for assembling at least two parts made from a composite material incorporating a ceramic or vitroceramic matrix reinforced by ceramic fibers. A continuous connection between these parts is achieved by approaching two of the parts along their respective edges to be assembled, forming a joint between the two parts by sewing with a tie or link of ceramic fibers from each of the parts to be assembled and heating the joints by a heating device employing a powerful and extremely localized heating until the two parts are welded together.

Abstract: A heat treatment installation for parts made of a composite material having a ceramic matrix and including a treatment enclosure which is connected to a microwave generator by a waveguide and which includes a press for hot pressing a part to be treated in the enclosure and a gas source for introducing a protective gas into the enclosure.

Abstract: A molding apparatus for the hot pressing of parts made of refractory material includes at least one element, such as a mold or an intermediate element, which is formed by a material capable of withstanding high temperatures, having adequate mechanical resistance and possessing particular anisotropic properties of thermal conductivity, in particular as a result of a structure including thermally conductive fibers oriented so that a preferential heat transfer occurs towards the areas of the part which are furthest away from its edges of the part, ensuring homogeneous heating or cooling throughout the part at all times.