摘要:
The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; iron powder and tin powder as the inorganic filler in a total content of 1-12 mass %. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber that possibly cause environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.
摘要:
A method of treating a carbon-carbon structure is provided. The method includes the step of infiltrating the carbon-carbon structure with a ceramic preparation (206, 306, 408) comprising an oxide compound and at least one of a boron compound or an oxide-boron compound to obtain a uniform distribution of the ceramic preparation within a porosity of the carbon-carbon structure. The carbon-carbon structure may be densified by chemical vapor infiltration (CVI) and heat treated to form borides (210, 312, 410). Heat treating the carbon-carbon may comprise a temperature ranging from 1000°C to 1900°C.
摘要:
A masterbatch composition comprises a composite of a polymer resin material and boron nitride. The masterbatch composition can be in the form of a powder or particles. The masterbatch composition can impart improved properties such as wear resistance, thermal conductivity, compressibility, etc., to a composition or article formed from the masterbatch composition. In one embodiment, the masterbatch composition can be used to form a brake pad composition and provides a brake pad with improved properties compared to a composition formed by dry blending the separate boron nitride and resin materials.
摘要:
Inorganic fibers having the composition: 10≤Al2O3≤50 mol %; 2≤K2O≤40 mol %; 30≤SiO2≤70 mol %; and in which SiO2+Al2O3+K2O>=80 mol % can be protected against surface crystallization of kalsilite by: including an amount of a nucleation promoting component effective to promote bulk crystallization in the glass; and/or providing on at least part of their surface, potassium scavenging materials.
摘要:
An object of the present invention is to obtain a friction material excellent in rust removability and friction material strength, particularly improved in friction material strength in a high temperature region, without using a whisker-like filler unfavorable in terms of working environment and health as a reinforcing material of the friction material, and without using a copper element that is natural-environmentally unfavorable. The present invention is directed to a friction material containing: at least one kind of a titanate compound having a shape having a plurality of convex portions; and a bio-soluble inorganic fiber.
摘要:
A non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 0.5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 3.5-10.0, wollastonite, and mica. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber possibly causing environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.
摘要:
The invention relates to a method for producing a component, which contains an intermetallic/ceramic composite material, involving the following method steps: producing a mixture consisting of at least one reactive constituent, whereby the reactive constituent contains titanium oxide; producing a ceramic preform from the mixture; whereby the ceramic preform has an open porosity ranging from 46 % to 60 %; placing the ceramic preform into a pressure die-casting tool; pressure-infiltrating the ceramic preform with aluminum or with an aluminum alloy to form an aluminum/ceramic composite material, whereby the aluminum alloy contains less than 7.3 % by weight of silicon; heat treating the aluminum/ceramic composite material above 500 °C in order to transform it into an intermetallic/ceramic composite material.
摘要:
A friction material comprising a sintered mass of iron in which graphite particles are dispersed, which sintered mass is formed from between 13 and 22 vol.% of iron fibres, between 13 and 22 vol.% of iron particles having a particle size of 10-400 νm, between 40 and 70 vol.% of graphite particles having a particle size of 25-3000 νm, and between 10 and 15 vol.% of a metallic binder having a melting point of 800-1140 °C, and a method of preparing such a friction material, wherein a mixture of these components is compressed at a pressure of at least 100 MPa so as to form a compact having a desired form and size, and where the compact thus formed is sintered at a temperature between 800 and 1140 °C for a period of time which is sufficiently long for achieving concretion of iron fibres, iron particles and metallic binder.