A coating composition for a lubricating coating film includes: (A) a phenolic resin; (B) an epoxy resin having an epoxy equivalent weight of 600 to 4000; and (C) at least one type of solid lubricant. The epoxy equivalent weight is generally defined by the number average molecular weight per the number of epoxy groups in a single molecule. The coating composition has a weight ratio of component (A) to the total weight of component (A) and component (B) of at least 50 weight %. A lubricating coating film, formed from the coating composition, has a high level of flexibility on surfaces of various base materials.

A refrigerant compressor comprises an electric component; and a compression component which is driven by the electric component and compresses a refrigerant. At least one of slide members included in the compression component is made of an iron-based material. An oxide coating film (150) is provided on a slide surface of the iron-based material, the oxide coating film including a first portion (151), a second portion (152), and/or a third portion (153). The first portion (151) contains at least fine crystals (155). The second portion (152) contains columnar grains (156). The third portion (153) contains layered grains (157).

A particulate composite lubricant for powder metallurgy is provided. It includes: first discrete particles comprising Montan acid ester wax and at least one fatty amide wax including at least one of: a fatty primary monoamide wax and a fatty bisamide wax. In another embodiment, the particulate composite lubricant for powder metallurgy includes first discrete particles comprising Montan acid ester wax and second discrete particles comprising an organic, metal-free pulverulent lubricant selected from the group consisting of fatty bisamide waxes, fatty monoamide waxes, glycerides, Montan acid ester waxes, paraffin wax, polyolefines, polyamides, polyesters, and mixtures thereof, wherein the particulate composite lubricant comprises at least one fatty amide wax including at least one of a fatty monoamide wax and a fatty bisamide wax.

A material that is useful as a wear-resistant member, a highly functional photocatalytic material, a photoelectric conversion element material, etc., is produced without the need for complicated processes or complicated handling, which are problems of the prior art. Provided is a method for producing a surface-treated metallic titanium material or titanium alloy material, the method comprising the steps of (1) forming titanium nitride on the surface of a metallic titanium material, and (2) heating the metallic titanium material with titanium nitride formed on the surface thereof obtained in step (1) in an oxidizing atmosphere. Also provided is a method for producing a surface-treated metallic titanium material or titanium alloy material, the method comprising, between steps (1) and (2) above, the step of anodizing the metallic titanium material with titanium nitride formed on the surface thereof obtained in step (1) in an electrolyte solution that does not have an etching effect on titanium, thereby forming a titanium oxide film. Further provided is a surface-treated material.

A particulate composite lubricant for powder metallurgy comprises: first discrete particles comprising at least about 90 wt % of a fatty primary monoamide wax, being substantially free of fatty bisamide wax, and being at least partially coated with metal oxide nanoparticles and second metal-stearate free discrete particles comprising a fatty bisamide wax. A particulate composite lubricant for powder metallurgy can comprise: a Montan acid ester wax and at least one fatty amide wax comprising at least one of a fatty monoamide wax and a fatty bisamide wax.

A bearing assembly is disclosed that includes a first component with a first bearing surface, and a second component with a second bearing surface. A fluid is disposed between the first bearing surface and the second bearing surface supporting the first bearing surface and the second bearing surface in a non-contact rotational relationship. The first bearing surface, or the second bearing surface, or both the first bearing surface and the second bearing surface include a surface layer with solid lubricant 2D nanoparticles in a matrix.

The present invention provides a steel wire rod having a lubricating coating film, which can achieve both workabilities such as wire drawability, spike property and ball ironing property, and corrosion resistance such as long-term rust prevention property; and a method for producing the same. Disclosed are a steel wire rod having a coating film containing no phosphorus, wherein the coating film includes a lower layer coating film composed of oxide and/or hydroxide of zirconium and having a film thickness of 1.0 to 200 nm, and an upper layer coating film containing silicon and tungsten, in order from a steel wire rod side, a mass ratio of tungsten/silicon being in a range of 1.3 to 18; and a method for producing the above steel wire rod, which includes bringing an aqueous chemical conversion treatment solution, which has a pH in a range of 2.5 to 5.0 and contains a water-soluble zirconium compound dissolved therein, into contact with a surface of a steel wire rod to form a lower layer coating film.

In some examples, an article includes a substrate and a coating on the substrate. The coating includes a stabilized microstructure including Magnli oxide phase including an oxide of at least one of W, Mo, Nb, Ta, or Re. In some examples, a technique may include forming a coating including a refractory metal on a surface of a substrate. The technique also may include heat treating the coating at a temperature between about 500 C. and about 700 C. to form a coating including a stabilized microstructure including Magnli oxide phase. The stabilized microstructure including Magnli oxide phase may include an oxide of at least one of W, Mo, Nb, Ta, or Re. In some examples, the coating including the stabilized microstructure including Magnli oxide phase exhibits a coefficient of friction that is at least 25% less than the coefficient of friction exhibited by the as-deposited coating under similar conditions.

Low friction coating of the present invention includes a boron-doped zinc oxide thin film, wherein piezoelectric polarization in a vertical direction perpendicular to a film surface and a lateral direction horizontal to the film surface occurs and a magnitude of the piezoelectric polarization in the vertical direction is within 150 pm and a magnitude of the piezoelectric polarization in the lateral direction is within 100 pm at 90% or more of measurement points. This makes it possible to greatly decrease the friction in a nanometer order.

A solid lubricant is supplied to a surface of an image carrier of an electrophotographic image forming apparatus. The solid lubricant contains a fatty acid metal salt and polypropylene, and the polypropylene has an acid value of 1 mg KOH/g or more. The solid lubricant is a solid substance of a melt mold containing the fatty acid metal salt and the polypropylene.