Abstract: A component part for an aluminum die-casting mold has an exposed surface that is a surface exposed to a cavity part of the aluminum die-casting mold and has diamond-like carbon coating formed at least on a part of the exposed surface, wherein the diamond-like carbon coating contains hydrogen in a content rate of 10 at % or more and 30 at % or less. The diamond-like carbon coating may further contain silicon in a content rate of less than 10 at %. Preferably, the content rate of silicon in the diamond-like carbon coating is 0.5 at % or more and 7 at % or less. Thereby, a component part for an aluminum die-casting mold which has excellent seizure resistance against molten metal containing aluminum can be provided.

Abstract: A coating film removal method for a coated member having a coating film formed over the surface of a substrate is disclosed, which can easily achieve a coating film removal, even for a carbon-based coating film containing carbon as a main component, besides a carbon-based coating film containing a metal element etc. A coated member regeneration method is also disclosed, which removes a coating film from a coated member, and then forms a new coating film over the member, to regenerate the coated member. The coating film removal method is adapted to remove a carbon-based coating film from a coated member (10) including a substrate, and the carbon-based coating film coated on at least a portion of a surface of the substrate while containing carbon as a main component.

Abstract: An amorphous carbon film includes carbon as a major component, and silicon in an amount of from 0.1 atomic % or more to 10 atomic % or less when the entire amorphous carbon film is taken as 100 atomic %. The carbon is composed of carbon having an sp2 hybrid orbital in an amount of from 60 atomic % or more to 90 atomic % or less when the entire carbon amount is taken as 100 atomic %. Also disclosed is a process for producing the amorphous carbon film.

Abstract: A friction clutch includes an iron inner clutch plate and two iron outer clutch plates. Each clutch plate has a sliding surface that friction-engages with the other clutch plates. A diamond-like carbon film containing silicon, which functions as a solid lubricant, is formed on the sliding surface of each outer clutch plate through a conventional method such as plasma chemical vapor deposition. The diamond-like carbon film contains 1 wt % to 80 wt % of silicon. A coupling device includes a pilot clutch mechanism that has the friction clutch and an electromagnetic actuator. As a result, the friction clutch has an improved resistance to wear, and the coupling device is durable.

Abstract: An amorphous carbon film forming apparatus according to the present invention is characterized by being provided with a film forming furnace 11; plural workpiece fixtures 23 for supporting plural plate-like workpieces 22 in a state that the same are piled up vertically in parallel with the interval between facing surfaces of two vertically adjoining of the plate-like workpieces 22 being in a range of 2 to 30 millimeters, the plural workpiece fixtures 23 being arranged within the film forming furnace 11 at a regular angular interval on a circle and being connected to a negative electrode; nozzles 31, 32 provided for supplying a processing gas and including at least one nozzle arranged at a center of the circle on which the plural workpiece fixtures 23 are arranged and plural nozzles arranged at a regular angular interval on another circle which surrounds the workpieces fixtures 23 radially outside thereof; and a plasma power supply connected to at least the workpiece fixtures 23.

Abstract: To provide a sliding member that exhibits excellent durability and is free of lead. A swash plate for a compressor as the sliding member of the invention contains a base material having on the surface thereof a sliding layer constituting at least a sliding surface, on which shoes slide. The sliding layer contains a first layer that contains an amorphous hard carbon (diamond-like carbon) film containing Si (DLC-Si film) and is formed on the base material, and a second layer that is formed on the first layer and contains polyamideimide (PAI) containing a solid lubricant such as MoS2.

Abstract: A drive force transmission device has an outer clutch plate and an inner clutch plate, which are rotatable relative to each other about a common rotational axis. The inner and outer clutch plates become frictionally engaged with each other with lubricant oil provided in between. The outer and inner clutch plates each have a sliding surface. The sliding surfaces face each other. A diamond-like carbon film is formed on the sliding surface of the outer clutch plate. Fine grooves are formed in the sliding surface of the inner clutch plate. The proportion of the sliding area to the sliding surface of the inner clutch plate at the initial stage of use is 55 to 90%.

Abstract: In an activated sludge treatment of organic waste water, excess sludge from the activated sludge aeration vessel is processed with hypochlorous acid in place of ozone without set up of aeration vessels and blowers to improve volume reduction cost of sludge without deterioration of water quality. The hypochlorous acid process is carried out by using an acidulous sodium hypochlorite aqueous solution which is prepared by mixing sodium hypochlorite aqueous solution with a dilute hydrochloric acid and diluting the resulting mixture with water within 1,000 ppm to 50,000 ppm of available chlorine concentration at a pH zone of more than 4 to less than 7.

Abstract: Under wet sliding conditions using drivetrain system lubricating oils, a high frictional sliding member exhibiting a high friction coefficient, a favorable ??v characteristic stably, excellent wear resistance, and low mating-member aggressiveness is provided. The present invention is a wet sliding member comprising: a substrate composed of metal, ceramics, or resin; and an amorphous hard carbon film formed integrally on a surface of the substrate, having a surface, at least a part of which is turned into a sliding surface for sliding under wet conditions, and containing at least either one of Si and N in an amount of from 1 to 50 atomic %.

Abstract: An inventive method of papermaking can be provided for creating an optimum wet end environment. In a preferred method, an aqueous solution of sodium hypochlorite acidified by hydrochloric acid to have a pH of greater than or equal to 4 and less than 7 and adjusted to have an effective chlorine concentration of 1,000 to 10,000 ppm, preferably 3,000 to 8,000 ppm is prepared and charged to a white water pit in a manner to be effective chlorine concentration therein to greater than or equal to 0.5 ppm. Before a step of papermaking, it is preferred that aqueous solution sodium hypochlorite having pH of greater than or equal to 4 and less than 7 is added continuously or intermittently to a raw material water with the expectation that at breaching a residual chlorine concentration becomes greater than or equal to 500 ppm.

Abstract: This aims to provide a wear-resistant copper-based alloy, which is advantages in not only enhancing wear resistance in a high temperature range but also enhancing crack resistance and machinability and which is especially suitable for forming a cladding layer. The wear-resistant copper-based alloy comprises, by weight, 4.7 to 22.0% nickel, 0.5 to 5.0% silicon, 2.7 to 22.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 2.7 to 22.0% one or more of tantalum, titanium, zirconium and hafnium, and the balance of copper with inevitable impurities.

Abstract: An amorphous carbon film forming apparatus according to the present invention is characterized by being provided with a film forming furnace 11; plural workpiece fixtures 23 for supporting plural plate-like workpieces 22 in a state that the same are piled up vertically in parallel with the interval between facing surfaces of two vertically adjoining of the plate-like workpieces 22 being in a range of 2 to 30 millimeters, the plural workpiece fixtures 23 being arranged within the film forming furnace 11 at a regular angular interval on a circle and being connected to a negative electrode; nozzles 31, 32 provided for supplying a processing gas and including at least one nozzle arranged at a center of the circle on which the plural workpiece fixtures 23 are arranged and plural nozzles arranged at a regular angular interval on another circle which surrounds the workpieces fixtures 23 radially outside thereof; and a plasma power supply connected to at least the workpiece fixtures 23.

Abstract: To provide a soft amorphous carbon exhibiting a low elastic modulus, an amorphous-carbon coated member provided with a coated film comprising the amorphous carbon, and a process for forming an amorphous carbon film. The amorphous carbon comprises carbon as a major component and hydrogen in an amount of from more than 30 atomic % to 60 atomic % or less, and exhibits an elastic modulus of from 40 or more to 150 GPa or less. Moreover, the amorphous-carbon coated member comprises a conductive substrate, and a coated film fixed on at least a part of a surface of the substrate and composed of the amorphous carbon. In addition, in a process for forming the amorphous-carbon coated film, an amorphous carbon film is formed on a surface of conductive substrates by a plasma CVD method.

Abstract: An amorphous-carbon coated member includes a conductive substrate, and an amorphous carbon film. The amorphous carbon film is fixed onto a part of a surface of the substrate at least, and includes a compositionally gradient film. The compositionally gradient film has an outer side and a substrate side, and is composed of carbon, silicon and hydrogen. The silicon concentration inclines continuously from the lowest to the highest in the direction away from the outer side to the substrate side. The hydrogen concentration inclines continuously from the highest to the lowest in the direction away from the outer side to the substrate side. The amorphous-carbon coated member exhibits not only good wear resistance but also low aggressiveness against mating member simultaneously.

Abstract: To provide a sliding member that exhibits excellent durability and is free of lead. A swash plate for a compressor as the sliding member of the invention contains a base material having on the surface thereof a sliding layer constituting at least a sliding surface, on which shoes slide. The sliding layer contains a first layer that contains an amorphous hard carbon (diamond-like carbon) film containing Si (DLC-Si film) and is formed on the base material, and a second layer that is formed on the first layer and contains polyamideimide (PAI) containing a solid lubricant such as MoS2.

Abstract: An amorphous carbon film includes carbon as a major component, and silicon in an amount of from 0.1 atomic % or more to 10 atomic % or less when the entire amorphous carbon film is taken as 100 atomic %. The carbon is composed of carbon having an sp2 hybrid orbital in an amount of from 60 atomic % or more to 90 atomic % or less when the entire carbon amount is taken as 100 atomic %. Also disclosed is a process for producing the amorphous carbon film.

Abstract: A sliding member includes a superficial portion forming a sliding surface. The superficial portion includes an oxygen-containing alloy containing at least one metallic element selected from the group consisting of molybdenum and tungsten in an amount of from 2 to 80% by weight; and oxygen in an amount of from 0.5 to 15% by weight. The sliding member sustains lubricating characteristics given to the sliding surface over a long period of time to maintain a low friction coefficient and durability.

Abstract: A semiconductor element heat dissipating member is provided which has excellent heat dissipation characteristics and adhesion characteristics and enables production of a semiconductor device at a low cost. A semiconductor device using the same, and a method of producing the same are also provided. The semiconductor element heat dissipating member has a conductive substrate and an electrically insulating amorphous carbon film containing hydrogen, and the electrically insulating amorphous carbon film is formed at least on a region of the conductive substrate on which region a semiconductor element is to be mounted.

Abstract: A low-friction sliding member is used under a wet condition employing a lubricant, and includes a substrate having a surface, and an amorphous hard carbon film formed on the surface of the substrate for contacting slidably with a mating member. The amorphous hard carbon film includes silicon in an amount of from 1 atomic % or more to 20 atomic % or less, hydrogen in an amount of from 20 atomic % or more to 50 atomic % or less, and the balance of carbon and inevitable impurities, when the entirety is taken as 100 atomic %, and exhibits a surface roughness Rzjis of 0.8 ?m or less. The low-friction sliding member exhibits reduced friction coefficients between itself and mating members, without relying on the adsorption and reaction of additives, included in lubricants, to the amorphous hard carbon films.

Abstract: A coating film removal method for a coated member having a coating film formed over the surface of a substrate is disclosed, which can easily achieve a coating film removal, even for a carbon-based coating film containing carbon as a main component, besides a carbon-based coating film containing a metal element etc. A coated member regeneration method is also disclosed, which removes a coating film from a coated member, and then forms a new coating film over the member, to regenerate the coated member. The coating film removal method is adapted to remove a carbon-based coating film from a coated member (10) including a substrate, and the carbon-based coating film coated on at least a portion of a surface of the substrate while containing carbon as a main component.