A neodymium-iron-boron permanent magnet material, a preparation method, and an application. The neodymium permanent magnet material includes R, Al, Cu, and Co; R comprises RL and RH; RL comprises one or many light rare earth elements among Nd, La, Ce, Pr, Pm, Sm, and Eu; RH comprises one or many heavy rare earth elements among Tb, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Sc; the neodymium-iron-boron permanent magnet material satisfies the following relations: (1) B/R: 0.033-0.037; (2) AI/RH: 0.12-2.7. The neodymium-iron-boron permanent magnet material has uniquely advantageous magnetic and mechanical properties, with Br≥13.12 kGs, Hcj≥17.83 kOe, and bending strength≥409 MPa.

An R-T-B based permanent magnet including R.sub.2T.sub.14B main phase crystal grains and a grain boundary. R represents one or more rare earth elements, T represents one or more iron group elements essentially including Fe or Fe and Co, and B represents boron. In a cross-section parallel to the alignment direction of the R-T-B based permanent magnet, the coverage of the R.sub.2T.sub.14B main phase crystal grains is 50.0% or more, and the area ratio of the R.sub.2T.sub.14B main phase crystal grains is 92.0% or more.

A non-oriented electrical steel sheet according to an embodiment of the present invention includes, in wt%, Si: 2.2 to 4.5 %, Mn: 0.5 % or less (excluding 0 %), AI: 0.001 to 0.5 %, Sn: 0.07 to 0.25 %, and N: 0.0010 to 0.0090 %, and the balance of Fe and inevitable impurities.

A surface layer portion existing in an inner direction from a surface of the steel sheet and a central portion existing inside the surface layer portion are included, and the central portion includes N at 0.005 wt% or less, and the surface layer portion further includes N at 0.001 wt% or more compared to the central portion; and the surface layer portion has an average grain size of 60 .Math.m or less, while the central portion has an average grain size of 70 to 300 .Math.m.

A soft magnetic alloy powder includes soft magnetic alloy particles having an amorphous phase. Each of the soft magnetic alloy particles has chemical composition represented by Fe.sub.aSi.sub.bB.sub.cC.sub.dP.sub.eCu.sub.fSn.sub.gM1.sub.hM2.sub.i, where M1 is one or more elements of Co and Ni, M2 is one or more elements of Ti, Zr, Hf, Nb, Ta, Mo, W, Cr, Al, Mn, Ag, V, Zn, As, Sb, Bi, Y, and a rare earth element, and 79≤a+h+i≤86, 0≤b≤5, 7.2≤c≤12.2, 0.1≤d≤3, 7.3≤c+d≤13.2, 0.5≤e≤10, 0.4≤f≤2, 0.3≤g≤6, 0≤h≤30, 0≤i≤5, and a+b+c+d+e+f+g+h+i=100 (parts by mol) are satisfied.

A sintered part has at least one base with a first end face which faces in a first axial direction and a second end face which faces in a second axial direction. The end faces are produced in a press for producing a green body (which is subsequently sintered to form the sintered part) by applying at least one punch which can be moved along the axial directions. The sintered part has an elevation extending from the first end face towards one end at least in the axial direction over a first height, and the elevation has a first width extending transversely to the axial direction in a radial direction and at least some portions of which are smaller than 0.8 millimeters, wherein at least some portions of the sintered part have a first density along the first width, said density equaling at least 87% of the full material density.

A sintered part has at least one base with a first end face which faces in a first axial direction and a second end face which faces in a second axial direction. The end faces are produced in a press for producing a green body (which is subsequently sintered to form the sintered part) by applying at least one punch which can be moved along the axial directions. The sintered part has an elevation extending from the first end face towards one end at least in the axial direction over a first height, and the elevation has a first width extending transversely to the axial direction in a radial direction and at least some portions of which are smaller than 0.8 millimeters, wherein at least some portions of the sintered part have a first density along the first width, said density equaling at least 87% of the full material density.

A soft magnetic alloy ribbon is made of a Fe-based soft magnetic alloy and includes a first laser peening trace row and a second laser peening trace row each of which includes a plurality of laser peening traces in a row in a first direction and which are arranged adjacent to each other in a second direction intersecting the first direction, and a domain wall extending in a third direction, in which D0<D1 where a straight line at an equal separation distance from the first laser peening trace row and the second laser peening trace row is defined as a central line, a straight line which has a first distance where a distance from the first laser peening trace row is shorter than the separation distance is defined as a first reference line, a width of the domain wall at a position intersecting the central line is defined as D0, and a width of the domain wall at a position intersecting the first reference line is defined as D1.

A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10.sup.−5 Torr to 1×10.sup.−7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.

A permanent magnet material is based on a manganese-aluminum alloy which further includes scandium. A method for producing such a permanent magnet material as well as the use of the permanent magnet material for producing a permanent magnet and for producing an electric motor and/or an electric power generating device are also described. Moreover, an electric motor including the permanent magnet material, an electric power generating device including the permanent magnet material, and an aircraft including the permanent magnet material or the electric motor or the electric power generating device are also described.

A supersaturated solid solution soft magnetic material and a preparation method thereof are provided, belonging to the field of metal soft magnetic technologies. The supersaturated solid solution soft magnetic material is soft magnetic alloy with proportions of 72.0˜78.0 at % Fe, 12.0˜18.0 at % Si, 4.0˜12.0 at % Co and 1.0˜3.0 at % Ti. The preparation method uses molten glass purification or electromagnetic levitation melting to an alloy melt with a target supercooling degree, increases the solid solubility of the Ti element in α-Fe (Si, Co), and promotes the formation of supersaturated solid solution of Ti, thereby achieving the goal that the magnetocrystalline anisotropy constant and the magnetostriction coefficient tend to be zero. Ti element is uniformly distributed in the α-Fe (Si, Co) after supercooled solidification analyzed by X-ray energy spectrometer, a supersaturated solid solution alloy without Ti precipitation is obtained, and the soft magnetic alloy has low coercivity and high permeability.