A method for producing a magnetic powder includes performing a reduction treatment on the surface of particles including a hard magnetic material to form core-shell particles each having a shell portion including a soft magnetic material.

Provided is a composite material in which a carbon material and nanoparticles are efficiently combined to enhance the battery characteristic of a secondary battery. The composite material including a carbon material having a plurality of recesses and a plurality of protrusions and including nanoparticles that are at least partially combined with the carbon material, the composite material having a rate of the nanoparticles combined in the carbon material and the nanoparticles of 11% by weight or more.

Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050° C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.

Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050° C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.

The present invention concerns a double passivation galvanic displacement (GD) synthesis method for production of high performance, supported noble metal-M alloy composite material, where M is an electrochemically less noble metal, compared to the noble metal, the supported noble metal-M alloy composite material obtained by the synthesis, and the use of such composite material as electrocatalyst material.

The present invention concerns a double passivation galvanic displacement (GD) synthesis method for production of high performance, supported noble metal-M alloy composite material, where M is an electrochemically less noble metal, compared to the noble metal, the supported noble metal-M alloy composite material obtained by the synthesis, and the use of such composite material as electrocatalyst material.

Disclosed is a method for preparing a high-entropy alloy composites reinforced by diamond particles, belonging to the technical field of metal composites preparation. A vacuum coating preparation equipment equipped with an in-situ heating sample stage is used to perform a treatment of high-entropy alloy metallizing coating on the surface of diamond particles to generate modified diamond particles, where the alloy of the coating includes any four, five or six elements among seven elements of Ti, Zr, Hf, Nb, Ta, W and Mo in an equal atomic proportion. The obtained coating generates carbide film in-situ with the surface layer of diamond particles, while the high-entropy alloy covers the carbide film, ensuring a strong bond with the diamond, and the high-entropy alloy composites reinforced by diamond particles are finally prepared.

Provided is a core/shell composite that includes a core portion containing a heat resistant material selected from an inorganic oxide, a ceramic, a mineral and the like and having rigidity, and at least one layer of shell portion containing a hydrogen absorbing/desorbing metal covering the entire or a part of the core portion. The heat resistant material contained in the core portion has a melting point higher than the highest melting point among the hydrogen absorbing/desorbing metal contained in the shell portion. In a method for producing the core/shell composite, the core portion is covered with the shell portion by deposition in the absence of oxygen.

The invention relates to nickel-coated hexagonal boron nitride nanosheet composite powder, its preparation and high-performance composite ceramic cutting tool material. The composite powder has a core-shell structure with BNNS as the core and Ni as the shell. The self-lubricating ceramic cutting tool material is prepared by wet ball milling mixing and vacuum hot-pressing sintering with a phase alumina as the matrix, tungsten-titanium carbide as the reinforcing phase, nickel-coated hexagonal boron nitride nanosheet composite powder as the solid lubricant and magnesium oxide and yttrium oxide as the sintering aids. The invention also provides preparation methods of the nickel-coated hexagonal boron nitride nanosheet composite powder and the self-lubricating ceramic cutting tool material.

The present invention provides covered particles wherein insulating layers cover the surfaces of electroconductive particles, and the covered particles are excellent in the adhesion between the surfaces of the electroconductive particles and the insulating layers. The covered particles includes: electroconductive particles in which metal films are formed on the surfaces of core materials, and a triazole-based compound is disposed on the outer surfaces on the sides opposite to the core materials in the metal films; and insulating layers covering the electroconductive particles, and the insulating layers comprise a compound having phosphonium groups.