JOINT BETWEEN A METAL PART AND A CERAMIC PART BASED SIC AND/OR C

• Main Authors: FROMENTIN, Jean-François, KOLTSOV, Alexey, GILLIA, Olivier, EUSTATHOPOULOS, Nikolas, HODAJ, Fiqiri, BENOIT, Joël Michel, CHAUMAT, Valérie
• Format: Patent
• Language: English; French; German
• Published: 14.03.2018
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBUSTION APPARATUS; COMBUSTION ENGINES; COMBUSTION PROCESSES; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINE PLANTS IN GENERAL; GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGHVELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; JET-PROPULSION PLANTS; LIGHTING; LIME, MAGNESIA; MACHINE TOOLS; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; REFRACTORIES; SLAG; SOLDERING OR UNSOLDERING; STEAM ENGINES; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS; WELDING; WORKING BY LASER BEAM

An assembly between a metal piece and a ceramic material piece made of SiC and/or C based ceramic material. The assembly includes a stack structure including the following elements assembled together in pairs in this order, by brazing: the metal piece; a first intermediate piece; a second intermediate piece; and the ceramic material piece. The second intermediate piece is made of another ceramic material, that is chemically less reactive relative to metals than are SiC or C, and that presents a coefficient of expansion smaller than that of the material constituting the metal piece. The first intermediate piece is made of metal and can deform to compensate for expansion difference between the metal piece and the second intermediate piece. The assembly can be used in a turbomachine.