The invention relates to a highly heat conductive valve seat ring (1) comprising a carrier layer (2) and a functional layer (3), wherein the carrier layer (2) consists of a solidified copper matrix containing 0.10 to 20% w/w of a solidifying component and the functional layer (3) consists of a solidified copper matrix which further contains, based on the copper matrix, 5 to 35% w/w of one or more hard phases.

Disclosed is a nano dispersion copper alloy with high air-tightness and low free oxygen content and a brief manufacturing process thereof, wherein alloy comprises the following components: Al.sub.2O.sub.3, Ca and La. The manufacturing process comprises the following steps of: preparing Cu—Al.sub.2O.sub.3 alloy powder by an internal oxidation method; mixing the Cu—Al.sub.2O.sub.3 alloy powder with Cu—Ca—La alloy powder; sheathing the mixed powder under protection of argon; performing hot extrusion and then rotary forging; vacuumizing the sheath after the rotary forging; and sealing and placing the sheath in a nitrogen atmosphere with a temperature of 450° C. to 550° C. and a pressure intensity of 40 Mpa to 60 Mpa for 3 hours to 5 hours. The dispersion copper prepared by the present disclosure has the advantages of low free oxygen content (≤15 ppm), high dimensional stability, good air-tightness and an air leakage rate≤1.0×10.sup.−10 Pa m.sup.3/s after hydrogen annealing.

A contact material mainly composed of an Ag alloy, includes: an Ag alloy; and at least one main additive existing as a phase different from the Ag alloy and selected from the group consisting of tin oxide, nickel, nickel oxide, iron, iron oxide, tungsten, tungsten carbide, tungsten oxide, zinc oxide, and carbon, wherein when a metal atom constituting the main additive or the main additive is carbon, the Ag alloy contains a solid solution element having a vacancy binding energy lower than a vacancy binding energy that is a binding energy between the metal atom included in the main additive and a vacancy in an Ag metal, or a binding energy between carbon included in the main additive of carbon and a vacancy in an Ag metal, in an amount of 0.01 wt. % or more.

Described herein are metal compositions comprising a particles of a transition metal or transition metal oxide, characterized in that the metal composition exhibits a new series with improved qualities relative to a metal composition without the particles of the transition metal or transition metal oxide; and methods of making and testing the same.

The present invention provides a laminating and shaping copper powder capable of shaping a laminated and shaped object of copper having a high electrical conductivity of, for example, 80% IACS or more. The present invention is a laminating and shaping copper powder obtained by mixing a nano-oxide of equal to or more than 0.01 wt % and equal to or less than 0.20 wt % and a pure copper powder. There is also provided a laminated and shaped object using the laminating and shaping copper powder of the present invention. There are also provided a manufacturing method of the laminated and shaped object using the laminating and shaping copper powder of the present invention and a laminating and shaping apparatus using the laminating and shaping copper powder.

A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.

The present invention relates to the use of a metal powder for additively manufacturing a shaped metal body by means of laser beam melting, wherein the metal is a metal of Group 11 of the periodic table of the elements or aluminium or an alloy or intermetallic phase of one of these metals and has an oxygen content of at least 2500 ppm by weight.

A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.

A component for a mirror array for EUV lithography, particularly for use in faceted mirrors in illumination systems of EUV lithography devices. A component (500) for a mirror array for EUV lithography is proposed which is at least partially made from a composite material including matrix material (502) that contains copper and/or aluminium, and reinforcing material in the form of fibers (504). The composite material also includes particles (508) that consist of one or more of the materials from the group: graphite, adamantine carbon, and ceramic.

A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a copper alloy part derived from a plurality of precipitation hardening copper alloy particles. The copper alloy parts are bonded to each other via interfaces between the copper alloy parts. The copper alloy part contains nickel and silicon as additive elements. The copper alloy part contains 2 to 5 percent by mass of nickel. A sliding member for an internal combustion engine includes the sliding member at a sliding part of the internal combustion engine.