The invention relates to a method for producing a component from an at least partially amorphous metal alloy, having the steps of: preparing a powder of an at least partially amorphous metal alloy, wherein the powder consists of spherical powder particles and the powder particles have a diameter of less than 125 m; pressing the powder into the desired shape of the component to be generated; compressing and sintering the powder by means of a heat treatment of the powder during pressing or after pressing at a temperature between the transformation temperature and the crystallisation temperature of the amorphous phase of the metal alloy, wherein the duration of the heat treatment is chosen such that the component is sintered after heat treatment and has an amorphous fraction of at least 85 percent. The invention also relates to a component made of a pressed, sintered, spherical, amorphous metal alloy powder, wherein the component has an amorphous fraction of at least 85 percent, and to the use of such a component as gear wheel, abrasive wheel, wear-resistant component, housing, watch casing, part of a gearing or semi-finished product.

The present application provides a preparation method for iridium nanocrystal, including the following steps: mixing an iridium salt, an alcohol solvent and a centrifugal waste liquid to form a mixed solution, and adding an alkali solution in an inert atmosphere for a heating reaction. After centrifugation, an iridium nanocrystal is obtained. The centrifugal waste liquid is a waste liquid produced in the pre-synthesis process of iridium nanocrystal. The preparation method can shorten the reaction time, and the obtained iridium nanocrystal has the advantages of high yield and low cost.

A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10 C. or less and an injection pressure of 5 MPa or more.

An Fe-based amorphous alloy of the present invention has a composition represented by formula (Fe.sub.100-a-b-c-d-eCr.sub.aP.sub.bC.sub.cB.sub.dSi.sub.e (a, b, c, d, and e are in terms of at %), where 0 at %a1.9 at %, 1.7 at %b8.0 at %, 0 at %e1.0 at %, an Fe content (100-a-b-c-d-e) is 77 at % or more, 19 at %b+c+d+e21.1 at %, 0.08b/(b+c+d)0.43, 0.06c/(c+d)0.87, and the Fe-based amorphous alloy has a glass transition temperature (Tg).

A method of forming copper oxide nanopowder includes dissolving copper metal bulk in an acidic solution to form a copper-containing solution, wherein the acidic solution is sulfuric acid or nitric acid. The method includes adding an alkaline solution into the copper-containing solution to precipitate a solid. The method includes filtering, collecting, and drying the solid. The method includes calcinating the solid to obtain copper oxide nanopowder. When the acidic solution is sulfuric acid, the copper oxide nanopowder is a combination of long-bar shaped and sheet-shaped. When the acidic solution is nitric acid, the copper oxide nanopowder is short-bar shaped. The copper oxide nanopowder and an aqueous resin can be mixed to form an electrically insulating and thermally conductive film.

A method for producing an amorphous alloy soft magnetic powder includes: a powder production step of producing an amorphous alloy powder that has an average particle diameter of 3.0 m or more and 40.0 m or less and that is formed of impurities and a composition represented by a composition formula (Fe.sub.1-xCr.sub.x).sub.a(Si.sub.1-yB.sub.y).sub.100-a-bC.sub.b; and a heat treatment step of subjecting the amorphous alloy powder to a heat treatment at a temperature of 400 C. or higher and 540 C. or lower to produce an amorphous alloy soft magnetic powder that has volume resistivity of 7.010.sup.2 [.Math.cm] or less when the amorphous alloy soft magnetic powder is pressurized under a pressure of 63.7 MPa.

The present application relates to an alloy powder composition, a method for manufacturing a molding from the alloy powder composition, a molding obtained from the method, and an inductor comprising the molding. The alloy powder composition comprises an Fe-based amorphous alloy powder and an Fe-based crystalline alloy powder; wherein the Fe-based amorphous alloy powder has a volume resistivity of equal to or less than 110.sup.6 .Math.cm when subjected to a force of 20 kN and the Fe-based crystalline alloy powder has a volume resistivity of equal to or greater than 110.sup.6 .Math.cm when subjected to a force of 20 kN; and wherein the Fe-based amorphous alloy powder comprises Fe, Co, Cr, C, P, and Si.