Abstract: [Object] To provide a nanocarbon/aluminum composite material having high strength and electrical conductivity for suitable use in a lead wire, a heat exchanger and an automotive part and a process for producing the nanocarbon/aluminum composite material. [Solution] There is provided a plating liquid for nanocarbon/aluminum composite production, comprising an aluminum halide, nanocarbon and 1,3-dialkylimidazolium halide and/or the like, wherein the molar ratio of the aluminum halide to the 1,3-dialkylimidazolium halide and/or the like is in the range of 20:80 to 80:20 and the 1,3-dialkylimidazolium halide and/or the like has an alkyl group with a carbon number of 1 to 12. There are also provided a nanocarbon/aluminum composite production process comprising forming a plating film on a substrate surface by electrolysis of the plating liquid in a dry, oxygen-free atmosphere with the passage of a direct current etc. under the electrolysis conditions of a bath temperature of 0 to 300° C. and a current density of 0.

Abstract: A heat dissipation assembly in which a heat generator and a heat dissipator are integrated via an electrically insulating and thermally conductive sheet, at least one surface of which a thermally conductive grease is applied to, in which the thermally conductive grease is incompatible with the electrically insulating and thermally conductive sheet. Heat from the heat generator such as a semiconductor device or the like can be effectively dissipated while an electrically insulating condition is maintained over a long period of time.

Abstract: An insulation sheet is formed by a heat conductive filler of an amount of 70–93 mass % in an organopolysiloxane base material. The content of conductive impurities in the insulation sheet is 500 ppm or less. The insulation sheet according to one embodiment is interposed between a semiconductor device and a heat sink.

Abstract: A heat dissipation assembly in which a heat generator and a heat dissipator are integrated via an electrically insulating and thermally conductive sheet, at least one surface of which a thermally conductive grease is applied to, in which the thermally conductive grease is incompatible with the electrically insulating and thermally conductive sheet. Heat from the heat generator such as a semiconductor device or the like can be effectively dissipated while an electrically insulating condition is maintained over a long period of time.

Abstract: An insulation sheet is formed by a heat conductive filler of an amount of 70-93 mass % in an organopolysiloxane base material. The content of conductive impurities in the insulation sheet is 500 ppm or less. The insulation sheet according to one embodiment is interposed between a semiconductor device and a heat sink.

Abstract: The invention relates to an iron-based high-temperature wear-resistant sintered alloy. This alloy contains 3.74-13.36 wt % W, 0.39-5.58 wt % V, 0.2-5.78 wt % Cr, 0.1-0.6 wt % Si, 0.39-1.99 wt % Mn, 0.21-1.18 wt % S, and up to 2.16 wt % C. This alloy includes 20-80 wt % of a first phase and 80-20 wt % of a second phase, each distributed therein, in the form of spots. The first phase contains 3-7 wt % W, up to 1 wt % Cr, 0.1-0.6 wt % Si, 0.2-1 wt % Mn, 0.1-0.6 wt % S, and up to 2.2 wt % C. The first phase may contain 0.5-1.5 wt % V, and in this case the vanadium content of the alloy becomes 0.79-5.88 wt %. The second phase contains 7-15 wt % W, 2-7 wt % V, 1-7 wt % Cr, 0.1-0.6 wt % Si, 0.2-1 wt % Mn, 0.1-0.6 wt % S, and up to 2.2 wt % of C. Each phase contains 0.3-1.6 wt % MnS and a carbide of at least tungsten, which are dispersed therein. The second phase further contains 10-20 areal % tungsten carbide (particle diameter: ≧1 &mgr;m) dispersed therein. The alloy further contains 0.

Abstract: The invention relates to a sintered alloy. This sintered alloy includes 3-13.4 wt % of W, 0.4-5.6 wt % or 0.8-5.9 wt % of V, 0.2-5.6 wt % of Cr, 0.1-0.6 wt % or 0.6-5.0 wt % of Si, 0.1-0.6 wt % or 0.2-1.0 wt % of Mn, 0.6-2.2 wt % of C, and a balance of Fe. The sintered alloy includes first and second phase which are distributed therein, in a form of spots, respectively. The second phase is in an amount of from 20 to 80 wt %, based on the total weight of the first and second phases. The first phase contains 3-7 wt % of W, 0.5-1.5 wt % of optional V, up to 1 wt % of Cr, 0.1-0.6 wt % or 0.6-5.0 wt % of Si, 0.1-0.6 wt % or 0.2-1.0 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe. The second phase contains 3-15 wt % of W, 2-7 wt % of V, 1-7 wt % of Cr, 0.1-0.6 wt % or 0.6-5.0 wt % of Si, 0.1-0.6 wt % or 0.2-1.0 wt % of Mn, up to 2.2 wt % of C, and a balance of Fe. When the manganese contents of the first and second phases and the total of the sintered alloy are respectively in a range of from 0.2 to 1.

Abstract: A main rocker arm is supported for swinging motion to operate one of the intake and exhaust valves of an internal combustion engine. A high-speed rocker arm is supported on the main rocker arm for swinging motion according to rotation of a high-speed cam rotating in synchronism with engine rotation. The high-speed rocker arm has a slip surface for engagement with the high-speed cam. The high-speed rocker arm is drivingly connected to the main rocker arm for swinging motion in unison with the main rocker arm when the engine is operating at a high speed. The driving connection is released to permit swinging motion of the main rocker arm according to rotation of a low-speed cam independently of the swinging motion of the high-speed rocker arm when the engine is operating at a low speed. The slip surface of the high-speed rocker arm is made of an alloy tool steel having carbide deposited and dispersed to provide a hardness of HRC55 or more to the slip surface.