METHOD FOR ASSEMBLING SIC - BASED MATERIAL PARTS BY NON - REACTIVE BRAZING USING THE OXIDIZING ATMOSPHERE PROCEDE. BRAZING COMPOSITIONS, AND JOINT AND ASSEMBLY OBTAINED BY THIS PROCESS.

摘要

A method of assembling at least two pieces of silicon carbide materials by non-reactive soldering, each of the parts comprising a surface to be joined, in which the parts are brought into contact with a non-reactive solder composition, the assembly formed by the parts and the solder composition is heated to the brazing temperature, and the parts and the solder composition are cooled so as to form, after cooling thereof, a moderately refractory joint to the ambient temperature; wherein the non-reactive brazing composition is a composition A consisting of silica (SiO), alumina (Al O), and calcium oxide (CaO), or a composition B, consisting of alumina (Al 0 ), of calcium oxide (CaO), and of magnesium oxide (MgO), and wherein before heating the assembly formed by the parts and the solder composition to the brazing temperature, a contribution of silicon in non-oxidized form on the surfaces to be assembled parts to be assembled and / or in the surface layers comprising the surfaces to assemble parts to be assembled, and / or in the solder composition. Solder composition. Refractory joint and assembly.