The disclosure discloses a method for preparing a γ′-Fe.sub.4N soft magnetic material by using liquid nitrogen through high-speed ball milling, and belongs to the field of the soft magnetic material. According to the method of the disclosure, high energy in the liquid nitrogen is used for obtaining a nanometer material Fe.sub.xN with a nitrogen atom supersaturation degree through cryogrinding. At a low temperature, the material is very brittle, and a surface volume ratio is very high, so that a content of nitrogen atoms adsorbed on a surface of a sample is as high as 22%. Through 300° C. post-annealing, γ′-Fe.sub.4N is directly obtained from α-Fe through phase change, so that a nanometer crystal γ′-Fe.sub.4N soft magnetic material is prepared. The method of the disclosure has the advantages that an operation is simple and convenient, the cost is low, the large-scale industrialized production can be realized, and the method belongs to a novel alternative method for preparing a high-grade soft magnetic material with ideal magnetism. The γ′-Fe.sub.4N soft magnetic material prepared by the method of the disclosure has the advantages of high Ms, low coercivity and high surface resistivity, and can be used for a transformer and an inductor operated in a high-frequency semiconductor switch.

A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability μ′ having the composition formula (Fe.sub.(1−(α+β))X1.sub.αX2.sub.β).sub.(1−(a+b+c+d+e))B.sub.aSi.sub.bC.sub.cCu.sub.dM.sub.e. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140<a≤0.240, 0≤b≤0.030, 0<c<0.080, 0<d≤0.020, 0≤e≤0.030, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied.

The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

A method for manufacturing a thin sheet-like bonding member, including applying a paste including first particles including a first metal, second particles including a second metal having a lower melting point than the first metal, and a solvent to a surface of a base material made of a substance that does not react with the second metal; heating the paste at a temperature lower than a melting point of the first metal and higher than the melting point of the second metal to form a thin sheet-like bonding member on the surface of the base material; and peeling the thin sheet-like bonding member from the base material to obtain the thin sheet-like bonding member.

The present disclosure relates to a method of three-dimensional (3D) printing a 3D printed object. The method comprises: selectively jetting a marking agent onto a first region of build material, wherein the build material comprises at least one meta and/or ceramic; selectively jetting a binding agent onto at least a portion of the build material; and binding the build material to form a layer; such that the marking agent is incorporated in the metal part in a predetermined arrangement that forms a detectable marker in the 3D printed object. The disclosure also relates to a multi-fluid inkjet kit for 3D printing.

The present invention provides an alloy, an alloy powder, an alloy member, and a composite member which are excellent in corrosion resistance and wear resistance, have crack resistance, and are suitable for an additive manufacturing method and the like. An alloy and an alloy powder include, by mass %, Cr: 18 to 22%, Mo: 18 to 28%, Ta: 1.5 to 57%, C: 1.0 to 2.5%, Nb: 0 to 42%, Ti: 0 to 15%, V: 0 to 27%, Zr: 0 to 29%, and a remainder consisting of Ni and unavoidable impurities, where a molar ratio of (Ta+0.7Nb+Ti+0.6V+Zr)/C=0.5 to 1.5 is satisfied. An alloy member is an additively manufactured product or a cast having such a solidification structure, and the solidification structure is a dendrite-like crystal structure having a metal phase having a face-centered cubic structure and carbides.

A silver powder is produced by reducing silver carboxylate and a particle size distribution of primary particles comprises a first peak of a particle size in a range of 20 nm to 70 nm and a second peak of a particle size in a range of 200 nm to 500 nm, organic matters are decomposed in an extent of 50 mass % or more at 150° C., gases generated in heating at 100° C. are: gaseous carbon dioxide; evaporated acetone; and evaporated water.

A polymer-assisted 3D printing method and ink compositions are used to manufacture magnetocaloric devices having many applications including in heat pumps, refrigerators, etc. The ink compositions and printing methods can produce compositionally graded, anisotropically aligned magnetocaloric architectures with designed pores and channels, to bring forth significant improvement in heat exchange efficiency.