Double transition joint for the joining of ceramics to metals

• Main Authors: FERNIE JOHN ANDREW, BROWN DAVID J, KAVILVEEDU NARAYANAN RAJESH, WANG YONG, ROBERTS MARTYN DAVID
• Format: Patent
• Language: English
• Published: 21.04.2015
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ARTIFICIAL STONE; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CEMENTS; CERAMICS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CRACKING HYDROCARBON OILS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FUELS; GLASS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIME, MAGNESIA; LUBRICANTS; MACHINE TOOLS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL OR SLAG WOOL; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; POWDER METALLURGY; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; SOLDERING OR UNSOLDERING; SPRAYING OR ATOMISING IN GENERAL; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; TREATMENT OF NATURAL STONE; WELDING; WORKING BY LASER BEAM; WORKING CEMENT, CLAY, OR STONE

The invention is directed to effective means for joining materials having dissimilar coefficients of thermal expansion, such as advanced ceramics with metallic compounds. Moreover, the present invention relates to furnace tubes and methods of fabricating a joint between two different materials, which is compositionally graded to provide a substantially graded coefficient of thermal expansion between the joint materials.