MULTILAYER METAL/FLEXIBLE GRAPHITE SEALS SUITABLE FOR HIGH-TEMPERATURE SERVICE CONDITIONS

• Main Author: POTIER, Alexandre
• Format: Patent
• Language: English; French; German
• Published: 26.04.2017
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PISTONS; REFRACTORIES; SEALINGS; SLAG; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

The present invention relates generally to a composite plate produced by an alternating stack of (n+1) flexible graphite foils and (n) perforated metal reinforcing foils with spurs (where n 2). The thicknesses of the flexible graphite foils used are preferably such that any 2 mm slice of thickness of the composite plate comprises at least 3 layers of flexible graphite, and has a graphite density per unit area of at least 2.34 kg/m2. For each perforated metal reinforcing foil, the spurs present on the foil generally have a height in relation to the surface of that foil that does not exceed about 1.3 times the thickness of the thinnest of the flexible graphite layers to which it is attached. A composite plate of the present invention enables the manufacture of gaskets that resist temperatures up to 550° C. under continuous service.