Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material comprises R, B, M, Fe, Co, X and inevitable impurities, wherein: (1) R is a rare earth element, and the R includes at least Nd and RH, M being one or more of Ti, Zr and Nb, and X including Cu, “Al and/or Ga”; and (2) in percentage by weight, R: 30.5-32.0 wt%, B: 0.95-0.99 wt%, M: 0.3-0.6 wt%, X: 0.8-1.8 wt%, and Cu: 0.35-0.50 wt%, and the balance is Fe, Co and inevitable impurities. According to the present invention, under the condition of 0.3-0.6 wt% of a high melting point metal, a permanent magnet material with an excellent magnet performance and a good squareness is obtained.

Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material comprises R, B, M, Fe, Co, X and inevitable impurities, wherein: (1) R is a rare earth element, and the R includes at least Nd and RH, M being one or more of Ti, Zr and Nb, and X including Cu, “Al and/or Ga”; and (2) in percentage by weight, R: 30.5-32.0 wt%, B: 0.95-0.99 wt%, M: 0.3-0.6 wt%, X: 0.8-1.8 wt%, and Cu: 0.35-0.50 wt%, and the balance is Fe, Co and inevitable impurities. According to the present invention, under the condition of 0.3-0.6 wt% of a high melting point metal, a permanent magnet material with an excellent magnet performance and a good squareness is obtained.

An additive manufacturing system including a two-dimensional energy patterning system for imaging a powder bed is disclosed. The two-dimensional energy patterning system may be used to control the rate of cooling experienced by each successive additive layer. Accordingly, the system may be used to heat treat the various additive layers.

A powder composition is used for the fabrication of casting inserts, designed to produce local composite zones resistant to abrasive wear. The composite zones are reinforced with carbides and borides or with mixtures thereof formed in situ in castings. The powder includes powder reactants of the formation of carbides and/or borides selected from the group of TiC, WC, ZrC, NbC, TaC, TiB2, ZrB2, or mixtures thereof. The carbides and/or borides forming after crystallization particles reinforces the composite zones in castings. The powder composition further includes moderator powders in the form of a mixture of metal powders, which after crystallization form matrix of the composite zone in casting. A casting insert is disclosed for the fabrication in casting of local composite zones resistant to abrasive wear. A method for the fabrication of local composite zones in castings uses for this purpose the reaction of the self-propagating high temperature synthesis (SHS).

A powder composition is used for the fabrication of casting inserts, designed to produce local composite zones resistant to abrasive wear. The composite zones are reinforced with carbides and borides or with mixtures thereof formed in situ in castings. The powder includes powder reactants of the formation of carbides and/or borides selected from the group of TiC, WC, ZrC, NbC, TaC, TiB2, ZrB2, or mixtures thereof. The carbides and/or borides forming after crystallization particles reinforces the composite zones in castings. The powder composition further includes moderator powders in the form of a mixture of metal powders, which after crystallization form matrix of the composite zone in casting. A casting insert is disclosed for the fabrication in casting of local composite zones resistant to abrasive wear. A method for the fabrication of local composite zones in castings uses for this purpose the reaction of the self-propagating high temperature synthesis (SHS).

A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 μm and 200 μm or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.

A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 μm and 200 μm or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.

This silver paste is used to form a silver paste layer by applying the silver paste directly on the surface of a copper or copper alloy member, and the silver paste includes a silver powder, a fatty acid silver salt, an aliphatic amine, a high-dielectric-constant alcohol having a dielectric constant of 30 or more, and a solvent having a dielectric constant of less than 30. The content of the high-dielectric-constant alcohol is preferably 0.01% by mass to 5% by mass when an amount of the silver paste is taken as 100% by mass.

This silver paste is used to form a silver paste layer by applying the silver paste directly on the surface of a copper or copper alloy member, and the silver paste includes a silver powder, a fatty acid silver salt, an aliphatic amine, a high-dielectric-constant alcohol having a dielectric constant of 30 or more, and a solvent having a dielectric constant of less than 30. The content of the high-dielectric-constant alcohol is preferably 0.01% by mass to 5% by mass when an amount of the silver paste is taken as 100% by mass.

A method for producing metal-based micro-porous structures includes continuously feeding a solid green part and a gas flow into a tunnel reactor having an aspect ratio greater than 2, wherein the solid green part has a characteristic diffusion mass transfer dimension less than 1 mm and a gas in the gas flow is substantially free of oxidants, and chemically reacting the gas in the gas flow and the green part under a predetermined temperature profile along a length of the tunnel reactor for a sufficient time to convert the green part into a solid product having pore sizes in a range of 0.3 nm to 5 μm.