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AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorsJean-Marc Domergue, Jean-Michel Georges, Michel Laxague
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A friction element is made out of a composite material comprising carbon fiber reinforcement and a matrix which, at least in the vicinity of the or each friction face, comprises: a first phase in the vicinity of the reinforcing fibers and containing pyrolytic carbon obtained by chemical vapor infiltration; a refractory second phase of carbon or ceramic obtained at least in part by pyrolysis of a liquid precursor; and a silicon carbide phase obtained by siliciding, for example. At least in the vicinity of the or each friction face, the composite material is preferably constituted, by volume, at least as follows: 15% to 35% carbon fibers; 10% to 55% first matrix phase containing pyrolytic carbon; 2% to 30% second matrix phase of refractory material; and 10% to 35% silicon carbide. The invention is applicable in particular to braking for rail or road vehicles.
A friction element having at least one friction face and made of a composite material comprising carbon fiber reinforcement and a matrix having at least a carbon phase and a silicon carbide phase, the element being characterized in that, at least in the vicinity of each friction face, the matrix comprises:
A method of manufacturing a composite material friction element having at least one friction face, the method comprising preparing a carbon fiber preform having accessible internal pores, and densifying the preform with a matrix having at least a carbon phase and at least a silicon carbide phase, the method being characterized in that densification of the preform comprises:
Dependencies are inferred from the claim text.