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AssigneeCommissariat a l'Energie Atomique
InventorsSerge Paidassi, Jacques Ernoult, Michel Brun, Pierre Monge-Cadet, Yves Pauleau, Guy Farges
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The present invention relates to a multilayer material more particularly intended for producing an anti-erosion and anti-abrasion coating, as well as the process for producing this multilayer material. The aim of the invention is to produce a material which has a greater resistance and which can be deposited at low temperatures. This aim is achieved with the aid of a multilayer material, which is characterized in that it comprises a substrate covered with at least one metallic tungsten ductile layer and at least one hard layer of a solid solution of an additional element chosen from among carbon or nitrogen or a mixture of carbon and nitrogen in tungsten or a tungsten alloy, the two types of layers are alternating. The invention more particularly relates to the production of a coating for parts used in aeronautics.
Multilayer material, characterized in that it comprises a substrate covered with at least one ductile, metallic tungsten or tungsten alloy layer and at least one hard layer of a solid solution of an addition element in tungsten or in a tungsten alloy, the two types of layers alternating, said addition element being selected from the group consisting of carbon and mixture of carbon and nitrogen, said substrate being a member selected from the group consisting of a titanium alloy, a stainless steel, an aluminum alloy and a nickel alloy.
Process for producing a multilayer material by vacuum vapour phase deposition on a substrate, characterized in that it comprises introducing a substrate into a cathodic sputtering enclosure and carrying out a cathodic sputtering respectively from a target or a source of pure tungsten or tungsten alloy in a plasma alternatively constituted by a rare gas or a mixture of rare gas and an addition gas, said addition gas containing an addition element selected from the group consisting of carbon and mixture of carbon and nitrogen, so as to alternatively deposit on the substrate at least one ductile metallic tungsten or tungsten alloy layer and at least one hard layer of a solid solution of said addition element in tungsten or in one of its alloys.
Multilayer material, characterized in that it comprises a substrate covered with at least one ductile metallic tungsten or tungsten alloy layer and at least one hard layer of a solid solution of carbon in tungsten or in a tungsten alloy, the two types of layers alternating, said substrate being a member selected from the group consisting of a titanium alloy, a stainless steel, an aluminum alloy and a nickel alloy.
Dependencies are inferred from the claim text.