Abstract:
PROBLEM TO BE SOLVED: To provide a roller and cage assembly, and a bearing employing the roller and cage assembly exhibiting such properties that a film formed by surface treatment causes no increase in stress and is not peeled off from the cage even if the film is thick, surface treatment is not affected by an additive included in oil for use, the wear of the cage can be prevented when the cage is used in an engine with large displacement or the like, and adhesiveness between the surface treatment layer and a substrate is improved.SOLUTION: The cage 2 is plated to form a primary plated layer 4 on the surface, and further plated to form a plated multilayer 5 comprising a plurality of plated layers on the surface of the primary plated layer 4. The plated multilayer 5 has a Ni PTFE plated layer formed on the surface of the primary plated layer 4, another plated layer which is formed on the surface of the Ni PTFE plated layer and has the same plating as that of the primary plated layer 4, and a Ni PTFE plated layer formed on the surface of the another plated layer.
Abstract:
Provided is a heat conductive silicone grease composition including (A) 100 parts by mass of an organopolysiloxane containing 2 or more alkenyl groups bonded to silicon atoms within each molecule, (B) an organohydrogenpolysiloxane containing 2 or more hydrogen atoms bonded to silicon atoms within each molecule, in sufficient quantity to provide from 0.1 to 5.0 hydrogen atoms bonded to silicon atoms within the component (B) for each alkenyl group within the component (A), (C) 100 to 2,200 parts by mass of a heat conductive filler, (D) an effective quantity of a platinum-based catalyst, and (E) an effective quantity of an addition reaction retarder, in which the component (C) includes more than 90% by mass and no more than 100% by mass of an indium powder with an average particle size of 0.1 to 100 µm. Also provided is a heat conductive silicone cured product obtained by curing the above composition by heating at a temperature equal to, or greater than, the melting point of the indium powder. Further provided is an electronic device including an electronic component, a heat radiating member, and a heat conductive member including the above cured product disposed between the electronic component and the heat radiating member. Still further provided is a method of curing the above composition. Even further provided is a method of forming a heat conductive member between an electronic component and a heat radiating member. The above heat conductive silicone grease composition generates a suitably thin cured product with excellent thermal conductivity that prevents problems such as the contamination of components other than the coated component, and the leakage of oily materials from the product if used over extended periods.
Abstract:
PROBLEM TO BE SOLVED: To provide a sintered copper based alloy product in which a solid lubricant having low adhesive properties such as PTFE and molybdenum disulfide is firmly stuck and fixed to the surface, and which has satisfactory slidability and seizure resistance even in an oil-free environment and a corrosive environment. SOLUTION: A sintered copper based alloy is treated with a selective chemical etching liquid, e.g., comprising one or more of compounds selected from the group consisting of peroxide, peroxo compounds, chromic acid and permanganic compounds, and further comprising one or more of compounds selected from the group consisting of phosphoric acid, sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, zircon hydrofluoric acid, titanium hydrofluoric acid, molybdic acid, tungstic acid, vanadic acid, niobic acid and organic chelating agents. Thereafter, a lubricative film is provided on the surface thereof. COPYRIGHT: (C)2004,JPO