| 摘要 |
A sintered friction material is formed by sintering a mixture of powdered metal and/or ceramic and 1-35% by volume of sheared metal fibres which have a melting point above the sintering temperature. The preferred mixture comprises 12-99% by volume powdered metal and 0-65% by volume non-metallic materials. The basic material consists by weight of 50% Cu, 5% Mo, 5% Fe, 1% "Monel" (Trade Mark), 16% mullite, 13% graphite and 10% sheared fibres such as Ni, Mo, stainless or carbon steel. The mixture is compacted at 40,000 p.s.i., sintered at 1800 DEG F. in a reducing atmosphere, cooled and then coined at 100,000 p.s.i. Examples of other friction materials containing Cu, Mo, Sn, mullite, graphite, Sb, SiO2 and steel fibres are also included. Heat-resistant ceramics containing MgO, BeO or ThO2 with Mo or steel sheared fibres are also produced by compacting and sintering in hydrogen at 2200 DEG F.ALSO:A sintered friction material comprises a sintered mixture of powdered metal and/or ceramic and 1%-35% by volume of sheared metal fibres which have a melting point above the sintering temperature. The preferred mixture comprises 12%-99% by volume of powdered metal and 05-65% by volume non-metallic materials. The basic composition consists by weight of 50% Cu, 5% Mo, 5% Fe, 1% "Monel" (Registered Trade Mark) 16% mullite, 13% graphite and 10% sheared fibres such as Ni, Mo, stainless or carbon steel. The mixture is compacted at 40,000 p.s.i. sintered at 1800 DEG F. in a reducing atmosphere and coined at 100,000 p.s.i. Examples of other friction materials containing, Cu, Mo, Sn, mullite, graphite, S6, SiO2 and steel fibres are also included. Heat resistant ceramics containing MgO, BeO or ThO2 with Mo or steel sheared fibres are also produced by compacting and sintering in hydrogen at 2200 DEG F. |
