Abstract:
Solid self-lubricating composites comprising carbon or graphite fiber preforms reinforced with high temperature resins and self-lubricating pigments are disclosed which withstand very high loads at very high temperatures.
Abstract:
A porous metal or alloy layer is formed by sintering or the like on a metal backing formed of steel, for example. Copper or a copper-base alloy is generally used for forming the porous metal or alloy layer. The porous metal or alloy layer having the metal backing is impregnated with a mixture comprising 1-25% by volume of lead fluoride, 1-30% by volume of one or both of lead and a lead-tin alloy consisting of 3-30% by weight of tin and the remainder being lead, and the remainder essentially polytetrafluoroethylene, wherein the lead fluoride and one or both of the lead-tin alloy and lead being 2-25% by volume in total, thereby a bearing material of this invention is provided. Depending on the use to which the bearing material is put, at least one additive selected from the group consisting of molybdenum, tungsten disulfide, cadmium oxide, aluminum oxide, calcium fluoride, lithium fluoride, graphite, lead iodide, glass fibers, carbon fibers and a phosphate may be contained in 0.1-5% by volume in the mixture, to improve the performance of the bearing. The bearing material of this kind is suitable for use in shock absorbers of vehicles or the like which move in reciprocatory sliding movement under varying loads.
Abstract:
An antifriction alloy containing iron, molybdenum and sulphur, and having a low coefficient of friction, even in the dry state, is disclosed. The alloy contains 8.0-26.6% iron, 41.0-62.5% molybdenum and 23.3-40.5% sulphur. The alloy may comprise a matrix of Fe.sub.x Mo.sub.3+y S.sub.4, where x and y are less than 1. (e.g. FeMo.sub.4 S.sub.5) in which is dispersed FeMo.sub.2 S.sub.4 and/or the .epsilon. phase of the Fe/Mo/S equilibrium diagram. The alloy reacts with a material against which it rubs, to form the sulphide of that material on the rubbed surface. The alloy may be made by chemical reaction, fusion, vacuum deposition, or powder metallurgy. It can be used alone, or as a surface layer on, or inclusion in, another material, or it can be dispersed as a powder in a lubricant.
Abstract translation:公开了一种含有铁,钼和硫的摩擦合金,即使在干燥状态下具有低摩擦系数的摩擦合金。 该合金含有8.0-26.6%的铁,41.0-62.5%的钼和23.3-40.5%的硫。 合金可以包含FexMo 3 + yS 4的基质,其中x和y小于1.(例如FeMo 4 S 5),其中分散有FeMo 2 S 4和/或Fe / Mo / S平衡图的ε相。 该合金与其摩擦的材料反应,以在摩擦表面上形成该材料的硫化物。 该合金可以通过化学反应,熔融,真空沉积或粉末冶金制造。 它可以单独使用,也可以作为另一种材料的表面层或包含在其中,或者可以作为粉末分散在润滑剂中。
Abstract:
A low-ash, high-alkalinity-value lubricating oil additive is prepared by chemically combining a nitrogen-containing compound, a basically reacting metallic compound, a suspending agent therefor, and a chalcogen compound.
Abstract:
Finely divided B.sup.11 N particles dispersed in a carrier form as anti-gall, anti-seize lubricants in high temperature situations where neutron radiation is present.Suitable carrier materials comprise volatile solvents, B.sup.11 carborane polysiloxanes, polyphenyl siloxanes, polyphenyl ethers and dimethyl polyalkylene ether copolymers of methylphenyl siloxanes.
Abstract:
An improved lubricating oil composition comprising a major amount of oil of lubricating viscosity; a minor amount by weight of solid particles effective to improve the lubricating properties of the composition; and a minor amount by weight of at least one of certain co-polymers derived from the polymerization of (1) an N-vinyl-pyrrolidone, and (2) an oil-soluble acrylic ester.An improved method for lubricating an internal combustion engine is also disclosed.
Abstract:
This disclosure describes the process for producing an apparently amorphous porous boron carbide having a mean particle size less than 1 micron in diameter, effective pore sizes on the order of 30 Angstrom units, and surface areas on the order of 100 m.sup.2 /gr and greater. The process involves the gaseous phase reaction of acetylene (C.sub.2 H.sub.2) with diborane (B.sub.2 H.sub.6). The reaction is produced in a closed chamber initiated by an appropriate igniting device, such as a hot wire. This disclosure defines an optimum ratio of four parts diborane to one part acetylene and it describes the operating conditions under which the reaction occurs and the variation in physical properties and yield resulting from changes of ratio of the constituents. It also describes modification of the present batch process to a continuous production process. Typical uses for the material in its basic or altered form are described, such as a catalyst for gas-solid reactions, as a catalyst-supporting substrate for certain transition metals and other catalytic materials, as a gelling agent or grease thickener, as a thermal neutron absorber, either neat or in admixture with oils, etc., as a high temperature insulation material and as a fluidized bed heat exchange medium.
Abstract translation:本公开内容描述了生产直径小于1微米,有效孔径为30埃单位的表面无定形多孔碳化硼和约100平方米/平方米以上表面积的表面无定形多孔碳化硼的方法。 该方法涉及乙炔(C 2 H 2)与乙硼烷(B 2 H 6)的气相反应。 该反应在由适当的点火装置(例如热丝)引发的封闭室中产生。 该公开内容定义了四份乙硼烷与一份乙炔的最佳比例,并描述了反应发生的操作条件以及由组分比例变化引起的物理性能和产率的变化。 它还描述了将本批次过程修改为连续生产过程。 描述了其基本或改变形式的材料的典型用途,例如用于气固反应的催化剂,作为某些过渡金属和其它催化材料的催化剂支撑基质,作为胶凝剂或油脂增稠剂,作为热 作为高温绝缘材料和作为流化床热交换介质的纯化或与油等混合的中子吸收剂。
Abstract:
Bearing materials having low coefficient of friction and high wear resistance comprise 50 to 90 percent by weight of a powdered solid lubricant bonded by a polymerized mixture of unsaturated organic compounds, containing at least 30% divinylbenzene. The solid lubricant is preferably MoS.sub.2 or a mixture of MoS.sub.2 and graphite. The binder is preferably polymerized technical divinylbenzene, a mixture of isomers.
Abstract:
A METHOD OF PRODUCING HEAT-RESISTANT UP TO 350*C. ANTIFRICTION MATERIALS FOR DRY FRICTION UNITS. THE METHOD CONSISTS IN CURING A MIXTURE OF POLYPHENYLENE OLIGOMERS IN COMBINATION WITH VARIOUS FILLERS. THE OLIGOMERS ARE CHARACTERIZED BY THE STRUCTURE
(R,R''-PHENYL)-(X-C6H3(-R''))N-X-C*CH
WHEREIN X IS A DIRECT BAND, PHENYLENE,
(-(PHENYLENE))2-O, (-(PHENYLENE))2-(CH2)N''
N''=0-8; R IS H, PHENYL,
(4-(CH*C-)PHENYL)-
R'' IS H, PHENYL,
PYRIDINE, BR-C6H5, CL-C6H5
AND ALSO-X-CH$CH; N=0-600, WHEREIN WHEN X IS A DIRECT BOND, N IS AT LEAST 1. THE CURED PRODUCTS FEATURE A FRICTION COEFFICIENT OF 0.08-0.17, HEAT RESISTANCE UP TO 370*C., IMPACT STRENGTH UP TO 17 KG.-CM./CM.2, AND CAN BE USED, MAINLY FOR ROLLING AND SLIDING FRICTION UNITS.