A joined body of a joining base material and a metal layer which, when the metal layer is joined to the base material, adhesion of the metal layer is high, variation in adhesion is small, and the joining can be performed inexpensively. The metal layer is joined to the joining base material via an intermediate layer coating formed on a joint surface of the base material. The intermediate layer coating is fused to the joint surface of the base material, and an anchor forming material that joins the metal layer by an anchor effect is dispersed and embedded in the intermediate layer coating; the anchor forming material partially protrudes outward from the intermediate layer coating, and is fused to the intermediate layer coating; and the metal layer is joined to a surface of the intermediate layer coating and a surface of the anchor forming material protruding outward from the intermediate layer coating.

Provided is a hard sintered body which exhibits excellent high temperature oxidation resistance and has a high hardness at a high temperature. In the hard sintered body, a binder phase is contained at from 8.8 to 34.4 mol % and the balance is composed of a hard phase and inevitable impurities. The binder phase contains iron aluminide containing FeAl as a main component and alumina that is dispersed in iron aluminide and has a particle size of 1 m or less. The hard phase is composed of at least one kind selected from carbides, nitrides, carbonitrides and borides of Group 4 metals, Group 5 metals and Group 6 metals in the periodic table, and solid solutions of these. This hard sintered body is obtained by mixing and pulverizing a binding particle powder containing an iron aluminide powder composed of at least one kind selected from FeAl.sub.2, Fe.sub.2Al.sub.5 and FeAl.sub.3 and a hard particle powder composed of at least one kind selected from carbides, nitrides, carbonitrides and borides of Group 4 metals, Group 5 metals and Group 6 metals in the periodic table and then sintering a mixed powder thus obtained.

A metallic coating includes a first metal, a second metal, phosphorous, and graphene nanoparticles. The first metal may be nickel and the second metal may be a refractory metal, such as tungsten, rhenium, molybdenum, niobium, tantalum, or mixtures thereof. The metallic coating may have, by weight, 1.0% to 40.0% of refractory metal, 1.0% to 20.0% of phosphorous, 0.01% to 5.0% of the graphene nanoplatelets, and a remainder of the nickel.

The cylinder rod of a hydraulic cylinder includes a body portion having a bar shape, and a head portion arranged at a longitudinal end of the body portion. The body portion has a coating formed on its outer peripheral surface. The coating includes, in terms of area ratio in cross section, not less than 56.1% and not more than 84.4% of a chromium carbide phase, with the remainder consisting of a nickel-based alloy phase and an oxide phase. The area ratio of the chromium carbide phase may be 61.7% or more.

A ceramic structure includes a ceramic base member having a main face; a hole extending from the main face into the ceramic base member; a metal electrode layer embedded in the ceramic base member; and a conductive member embedded in the ceramic base member so as to be electrically connected to the metal electrode layer and form a bottom of the hole. Further, the ceramic structure includes: a first metal member joined to the conductive member by a brazing material and having an average linear expansion coefficient not less than the average linear expansion coefficient of the conductive member; one or a plurality of second metal members having a greater average linear expansion coefficient than the first metal member; and a metal terminal joined to the one or the plurality of second metal members and having a greater average linear expansion coefficient than each second metal member.

Disclosed is process for producing a wear-resistant coating on a component. The process comprises providing an electrolyte which contains Co and/or Ni, dispersing first particles comprising hard material particles and/or slip material particles in the electrolyte, dispersing second particles comprising metal alloy particles in which the metal alloy comprises chromium and aluminum in the electrolyte, providing a component to be coated in a bath of the electrolyte which has first and second particles dispersed therein, and electrodepositing a matrix of Co and/or Ni with incorporated first and second particles on the component. A correspondingly produced wear-resistant coating is also disclosed.

A composite is obtained by press-molding a mixed powder comprising 20-50 vol % of a metal powder and 50-80 vol % of a diamond powder for which a first peak in a volumetric distribution of particle size lies at 5-25 m, and a second peak lies at 55-195 m, and a ratio between the area of a volumetric distribution of particle sizes of 1-35 m and the area of a volumetric distribution of particle sizes of 45-205 m is from 1:9 to 4:6, thereby obtaining a composite having a high thermal conductivity and a coefficient of thermal expansion close to that of semiconductor devices, which is easy to mold into a prescribed shape.

An aluminum-diamond composite that exhibits both high thermal conductivity and a coefficient of thermal expansion close to that of semiconductor devices, and that can suppress the occurrence of swelling, etc., of a surface metal layer portion even in actual use under a high load. An aluminum-diamond composite includes 65-80 vol % of a diamond powder having a roundness of at least 0.94, for which a first peak in a volumetric distribution of grain size lies at 5-25 m, and a second peak lies at 55-195 m, and a ratio between the area of the volumetric distribution of grain sizes of 1-35 m and the area of the volumetric distribution of grain sizes of 45-205 m is from 1:9 to 4:6; the balance being composed of a metal containing aluminum.

The invention relates to a copper-ceramic composite, comprising a ceramic substrate, which contains aluminum oxide, a coating on the ceramic substrate made of copper or a copper alloy, wherein the aluminum oxide has an average grain form factor R.sub.a(Al.sub.2O.sub.3), determined as an arithmetic average value from the form factors of the grains of the aluminum oxide, the copper or the copper alloy has an average grain form factor R.sub.a(Cu), determined as an arithmetic average of the form factors of the grains of the copper or copper alloy, and the average grain form factors of the aluminum oxide and copper or copper alloy meet the following condition: 0.5R.sub.a(Al.sub.2O.sub.3)/R.sub.a(Cu)2.0.

A sliding engine component may include a substrate having a surface coated with a first electroplated metallic layer and a second electroplated metallic layer. The first metallic layer may be disposed between the substrate and the second metallic layer. The first metallic layer and the second metallic layer may have a grained structure. The grained structure of each of the first metallic layer and the second metallic layer may have an aspect ratio between a mean grain size perpendicular to the substrate surface and a mean grain size parallel to the substrate surface. The aspect ratio of the second metallic layer may be less than the aspect ratio of the first metallic layer.