This bonded structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion contains a resin and inorganic particles. The inorganic particles are formed of ferrosilicon or non-oxide ceramics containing V. Some of the inorganic particles protrude toward the adhesive layer. The particle size of at least some of the inorganic particles protruding toward the adhesive layer is less than the film thickness of the film portion.

A low friction wear film includes a chromium layer provided on a surface of a metal substrate, a tungsten carbide layer provided on a surface of the chromium layer, and a diamond-like carbon layer as a top layer provided on a surface of the tungsten carbide layer. The tungsten carbide layer includes a chromium-tungsten carbide gradient layer and a tungsten carbide uniform layer. In the tungsten carbide layer, a tungsten-concentrated layer in which a tungsten simple substance is present is not provided at a boundary between the chromium-tungsten carbide gradient layer and the tungsten carbide uniform layer.

A gas turbine engine component includes a substrate having first surface and a second surface disposed opposite the first surface, a plurality of holes extending through the substrate from the first surface to the second surface, the holes defined by a plurality of respective walls each extending from the first surface to the second surface, a metallic bond coat disposed on the first surface, and an aluminide coating disposed on the first surface, the second surface, and the walls. The metallic bond coat is disposed between the first surface and the aluminide coating and the walls are free of the metallic bond coat.

A sliding member may include a metallic base, at least one intermediate bonding layer disposed on the metallic base, and a multilayer protective coating disposed on the intermediate bonding layer. The at least one intermediate bonding layer may be composed of at least one metal. The multilayer protective coating may include a plurality of CrAlN layers and a plurality of Cr(Al)N layers arranged in an alternating manner. The multilayer protective coating may include a plurality of periodicity layer groups, each of which may be defined by a CrAlN layer and an adjacent Cr(Al)N layer. The plurality of CrAlN layers may have a higher Al content than the plurality of Cr(Al)N layers. A thickness ratio of the CrAlN layer to the Cr(Al)N layer in each periodicity layer group may be from 1 to 10. The multilayer protective coating may have a total Al content of 15 to 40 atom-%.

The invention to which this application relates is improvements to the provision of Molybdenum and/or Tungsten containing coatings of the type which can be used to improve certain characteristics of the surface of a substrate to which the coating is applied. In one embodiment the coating also includes Ti to provide the advantages of high adhesion, high humidity and wear resistance of the coating and TiB.sub.2 to promote the formation of a relatively uniform, dense, coating, so strengthening the coating which is formed and improving the high temperature performance of the coatings.

A method is provided for producing a hot-pressed member including heating a Ni-based coated steel sheet, which includes, on a surface thereof, a ZnNi alloy coating layer containing 13% by mass or more of Ni, in a temperature region of an Ac3 transformation point to 1200 C.; and then hot-pressing the steel sheet.

Methods of forming a coating system on a surface of a cobalt-based superalloy component are provided. The method includes forming a nickel-based primer layer on the surface of the cobalt-based superalloy component; forming an intermediate nickel-containing layer on the nickel-based primer layer; and heat treating the cobalt-based superalloy component to form a diffusion coating on the surface of the cobalt-based superalloy component. The intermediate nickel-containing layer includes nickel, chromium, and aluminum. Coated cobalt-based superalloy components formed from such a method are also provided.

A coating system for a surface of a superalloy component is provided. The coating system includes a MCrAlY coating on the surface of the superalloy component, where M is Ni, Fe, Co, or a combination thereof. The MCrAlY coating generally has a higher chromium content than the superalloy component. The MCrAlY coating also includes a platinum-group metal aluminide diffusion layer. The MCrAlY coating includes Re, Ta, or a mixture thereof. Methods are also provided for forming a coating system on a surface of a superalloy component.

The present invention relates to a method for preventing gases and fluids to penetrate a surface of an object, comprising the steps of: depositing (S1) an amorphous metal (5) on a surface of an object (4); forming (S2) a continuous layer of the amorphous metal (5) on the surface of the object (4); binding (S3) the amorphous metal (5) to the surface of the object by chemical binding; and passivation (S4) of a surface of the amorphous metal (5) facing away from the surface of the object (4).

A piston for an internal combustion engine has a surface treatment portion on a piston base material at a piston crown surface, the surface treatment portion including, along the direction of depth from the surface side, a first layer that is comprised of a layer of a first metal or a layer containing the first metal, a second layer that contains both a second metal containing oxygen or an oxide of the second metal and a low-thermal-conductivity material, and a third layer that is comprised of a mixture of a third metal and the low-thermal-conductivity material.