Clutch linings comprising fiber-reinforced ceramic materials
In a friction pairing for clutch systems of two materials and processes for producing the pairing, one of the materials is a fiber-reinforced ceramic or metallic material A reinforced by carbon or ceramic fibers or whiskers. Material B acting against the material A in the friction pairing is selected from the group consisting of ceramic materials B11 and metallic materials B12, sintered metals B2, sintered oxidic ceramics B3, sintered nitridic ceramics B4, sintered carbidic ceramics B5 and organic sintered materials B6.
1. A friction pairing for clutch systems of two materials in which one of the materials is selected from the group consisting of fiber-reinforced ceramic and fiber-reinforced metallic materials A which comprise reinforcing agents selected from the group consisting of carbon fibers, ceramic fibers, and whiskers, and the material B acting against the material A in the friction pairing is selected from the group consisting of ceramic materials B11 and metallic materials B12, sintered metals B2, sintered oxidic ceramics B3, sintered nitridic ceramics B4, sintered carbidic ceramics B5 and organic sintered materials B6 which are sintered polymers selected from the group consisting of poly-p-oxybenzoate, polyamide-imide, poly-p-phenylene pyromellithimide, poly-m-phenylene isophthalamide, poly-p-bezamide, and polybenzimidazole.
2. A friction pairing as claimed in claim 1 , wherein the matrix of the ceramic materials B11 has a mass fraction of at least 40% of silicon carbide.
3. A friction pairing as claimed in claim 1 , wherein the materials B11 have been modified by infiltration with metal melts.
4. A friction pairing as claimed in claim 1 , wherein the materials B are reinforced materials wherein the reinforcing agent is selected from the group consisting of fibers and whiskers.
5. A friction pairing as claimed in claim 4 , wherein the reinforcing agents in the materials B are selected from the group consisting of short carbon fibers, fibers comprising carbidic materials, fibers comprising oxidic ceramic materials, fibers comprising nitridic ceramic materials, amorphous fibers, whiskers of high-melting metals and whiskers of ceramic materials.