The present invention provides a rare earth thin film magnet having Nd, Fe, and B as essential components, wherein the rare earth thin film magnet has a texture in which an α-Fe phase and a Nd.sub.2Fe.sub.14B phase are alternately arranged three-dimensionally, and each phase has an average crystal grain size of 10 to 30 nm. An object of this invention is to provide a rare earth thin film magnet having superior mass productivity and reproducibility and favorable magnetic properties, as well as to provide the production method thereof and a target for producing the thin film.

A soft magnetic powder has a composition represented by Fe.sub.100-a-b-c-d-e-f-g-hCu.sub.aSi.sub.bB.sub.cM.sub.dM′.sub.eX.sub.fAl.sub.gTi.sub.h (at %) (wherein M is at least one element selected from the group consisting of Nb and the like, M′ is at least one element selected from the group consisting of V and the like, X is at least one element selected from the group consisting of C and the like, and a, b, c, d, e, f, g, and h satisfy the following formulae: 0.1≤a≤3, 0<b≤30, 0<c≤25, 5≤b+c≤30, 0.1≤d≤30, 0≤e≤10, 0≤f≤10, 0.002≤g≤0.032, and 0≤h≤0.038), wherein a crystalline structure having a particle diameter of 1 to 30 nm is contained in an amount of 40 vol % or more.

A soft magnetic alloy powder which is a soft magnetic alloy powder having a low coercivity, and with which it is possible to obtain a green compact magnetic core having a high magnetic permeability. A soft magnetic alloy powder including a composition formula (Fe(1−(α+β))X1 αX2 β) (1−(a+b+c+d+e+f)) MaBbPcSidCeSf. XI is one or more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting or Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti and V. The amount of each component contained is within a specified range. The amorphous rate X (%) is at least 85%.

A Fe-based amorphous alloy containing subnanometer-scale ordered clusters, and a preparation method and a nanocrystalline alloy derivative thereof. The composition expression of the Fe-based amorphous alloy is Fe.sub.aSi.sub.bB.sub.c(Cu.sub.dX.sub.e)M.sub.fM′.sub.g, and X is at least one of Ti, Zr and Hf, M is at least one of V, Ta and Nb, and M′ at least one of Co, Ni, C, P, Ge, Cr, Mn, W, Zn, Sn, Sb and Mo; a, b, c, d, e, f and g respectively represent the atomic percent (percentage of the number of atoms) of the corresponding element, and satisfy: 74≤a≤82, 8≤b≤15, 4≤c≤10, 0.5≤d≤1.2, 0.4≤e≤1.8, 1≤f≤3.5, 0≤g≤1, 0.8≤e/d≤1.5 and a+b+c+d+e+f+g=100; the Fe-based amorphous alloy is a composite material composed of an amorphous alloy matrix with atoms arranged in complete disorder and ordered atomic clusters having the size ranging from 0.5 nm to 2 nm uniformly dispersed and distributed in the matrix. The Fe-based amorphous alloy has ultrahigh permeability: the permeability at the frequency of 100 kHz is more than 35000, and the saturation flux density more than 1.3 T.

The disclosure provides Fe—Cr—Ni—Mo—P—C—B metallic glass-forming alloys and metallic glasses that have a high glass forming ability along with a high thermal stability of the supercooled liquid against crystallization.

A method for producing a soft magnetic material having both high saturation magnetization and low coercive force, including: preparing an alloy having a composition represented by Compositional Formula 1 or 2 and having an amorphous phase, and heating the alloy at a rate of temperature rise of 10° C./sec or more and holding for 0 to 80 seconds at a temperature equal to or higher than the crystallization starting temperature and lower than the temperature at which Fe—B compounds start to form wherein, Compositional Formula 1 is Fe.sub.100-x-yB.sub.xM.sub.y, M represents at least one element selected from Nb, Mo, Ta, W, Ni, Co and Sn, and x and y are in atomic percent (at %) and satisfy the relational expressions of 10≤x≤16 and 0≥y≤8, and Compositional Formula 2 is Fe.sub.100-a-b-cB.sub.aCu.sub.bM′.sub.c, M′ represents at least one element selected from Nb, Mo, Ta, W, Ni and Co, and a, b and c are in atomic percent (at %) and satisfy the relational expressions 10≤a≤16, 0<b≤2 and 0≤c≤8.

Device and method for injection moulding a metal alloy intended for manufacturing at least one part made of an amorphous metal alloy or metallic glass, wherein: an injection mould (2) delimits a cavity that has a receiving face (4) and a frontal moulding face (5) opposite the receiving face, at least one sacrificial shaping insert (7) is placed in said cavity and has a rear face (8), at least one contact zone of which is adjacent to at least one contact zone of said receiving face of the cavity and a front face (9) that is situated opposite said moulding face of the mould and provided with a recessed shape, and an injection piston (I I) is movable in a chamber (12) of the mould and communicates with the moulding impression.

A rare earth permanent magnet material and a raw Material composition, a preparation method therefor and use thereof. The rare earth permanent magnet material comprises the following components in percentage by mass: 29.0-32.0 wt. % of R. where R comprises RH, and the content of RH is greater than 1 wt. %; 0.30-0.50 wt. % of Cu (not including 0.50 wt. %); 0.10-1.0 wt. % of Co; 0.05-0.20 wt. % of Ti; 0.92-0.98 wt. % of 13; and the remainder being Fe and unavoidable impurities; wherein R is a rare-earth element and at least comprises Nd; and RH is a heavy rare-earth element and at least comprises Tb. The R-T-B system permanent magnet material exhibits excellent performance, wherein Br≥14.30 kGs, and Hej≥24.1 kOe. The invention can synchronously improve Br and Hcj.

A multilayer block core includes a multilayer block in which nanocrystalline alloy ribbon pieces are layered, the nanocrystalline alloy ribbon pieces having a composition represented by the following Composition Formula (A).
Fe.sub.100-a-b-c-dB.sub.aSi.sub.bCu.sub.cM.sub.d  Composition Formula (A) In Composition Formula (A), each of a, b, c, and d is an atomic percent; the expressions 13.0≤a≤17.0, 3.5≤b≤5.0, 0.6≤c≤1.1, and 0≤d≤0.5 are satisfied; and M represents at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.

Disclosed are a composition for an Fe-based alloy and an Fe-based amorphous alloy powder, whereby a high-purity amorphous structure is maintained even after coating by thermal spraying or the like, but also various physical properties are improved. The composition for the Fe-based alloy includes iron, chromium, and molybdenum, wherein per 100 parts by weight of the iron, the chromium is contained in an amount of 25.4 to 55.3 parts by weight, the molybdenum is contained in an amount of 35.6 to 84.2 parts by weight, and at least one of carbon and boron is further contained.