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7438768 |
Hydrogen embrittlement is prevented in Sm 2 Co 17 -based magnets and R 2 Fe 14 B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating layer o...
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7435304 |
There are provided a coating composition for siliconizing, and a method for manufacturing a high silicon electrical steel sheet using the same. The coating composition includes: a Fe—Si-based composite compound sintered powder having a...
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7399368 |
A permanent magnet comprises a hard magnetic material that contains at least a rare earth element and an anti-ferromagnetic material, wherein the hard magnetic material and the anti-ferromagnetic material are magnetically coupled. A volu...
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7361235 |
A method of manufacturing an oxide dispersion strengthened ferritic steel excellent in high-temperature creep strength having a coarse grain structure. The method comprises mixing alloy powders and an Y 2 O 3 powder, subjecting the mixe...
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7270718 |
The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element su...
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7208056 |
An R-T-B system rare earth sintered magnet having a high mechanical strength and excellent corrosion resistance is provided. The R-T-B system rare earth sintered magnet of the present invention comprises a sintered body comprising a main...
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7179337 |
The invention provides a method for preparing a soft magnetic material which meets demands for low iron loss, high density, high strength and high productivity. The method comprises a surface oxidation step of forming oxide films on the ...
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7166172 |
A ferromagnetic iron alloy powder for a magnetic recording medium is composed of acicular iron-base particles of an average major axis length (X) of not less than 20 nm and not greater than 80 nm and have oxygen content of not less than ...
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7141126 |
Rare earth alloy powder having an oxygen content of 50 to 4000 wt. ppm and a nitrogen content of 150 to 1500 wt. ppm is compacted by dry pressing to produce a compact. The compact is impregnated with an oil agent and then sintered. The s...
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7138019 |
In the step of sintering a compact that is finally to be a magnetostrictive element, when the temperature in a furnace is elevated, the atmosphere in the furnace is evacuated by a vacuum pump to keep the pressure in the furnace at negati...
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7138018 |
A method for manufacturing an anisotropic magnet powder includes a high-temperature hydrogenation process of holding an RFeB-based alloy containing rare earth elements (R), B and Fe as main ingredients in a treating atmosphere under a fi...
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7132018 |
Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core mat...
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7077919 |
Disclosed herein is an insulating material between adjacent metal layers of a soft magnetic core, and a process for forming this insulating material. The insulating material is composed of the native metal oxides of the metallic core mat...
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7056393 |
A method of making a sintered body for a rare earth magnet includes the steps of (a) preparing a first coarse powder by coarsely pulverizing a rare earth alloy sintered body by a hydrogen pulverization process, (b) preparing a first fine...
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7018485 |
An apparatus for subjecting a rare earth alloy block to a hydrogenation process includes a casing, gas inlet and outlet ports, a member arranged to produce a gaseous flow, and a windbreak plate. The casing defines an inner space for rece...
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7011718 |
A bulk amorphous metal magnetic component has a plurality of laminations of ferromagnetic amorphous metal strips adhered together to form a generally three-dimensional part having the shape of a polyhedron. The component is formed by sta...
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6989062 |
The present invention concerns a method of improving the properties of powder metallurgically produced SMC compacted body consisting of a soft magnetic material of insulated powder particles and a lubricant, to a stress relieving heat tr...
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6955729 |
An alloy for bonded magnets of the present invention includes at least a main component of iron (Fe), 12-16 atomic % (at %) of rare-earth elements (R) including yttrium (Y), and 10.8-15 at % of boron (B), and is subjected to a hydrogen t...
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6780255 |
A magnetic powder of an Sm—Fe—N alloy, which has a mean particle diameter of 0.5 to 10 μm, and either an average acicularity of 75% or above or an average sphericity of 78% or above. The powder exhibits an extremely high residual ma...
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6764607 |
A powder for forming a R—Fe—B bonded magnet, wherein an R compound, such as an R oxide, an R carbide, an R nitride or an R hydride, which is contained in a raw material powder such as a super rapidly cooled powder or a hydrogen treat...
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6758918 |
Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets. The magnet powder is prepared by melt-spinning of a molten alloy and nitriding the alloy powder thus obtained to form a magnet alloy having an al...
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6758915 |
The invention is a grain-oriented magnetic steel sheet having extremely low iron loss, suitable for use as an iron core material for transformers and power generators, and a method for producing the same. The method includes forming a co...
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6746545 |
An R—Fe—B permanent magnet wherein R is Nd or a combination of Nd with a rare earth element is prepared by casting an R—Fe—B alloy, crushing the alloy in an oxygen-free atmosphere of argon, nitrogen or vacuum, effecting comminuti...
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6709533 |
This invention aims to provide a manufacturing method of an anisotropic magnet powder from which a bonded magnet with an improved loss of magnetization due to structural changes can be achieved. This is achieved by employing a low-temper...
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6623541 |
A sintered rare earth magnet consisting essentially of 20-30% by weight of R (wherein R is Sm or a mixture of Sm and another rare earth element), 10-45% by weight of Fe, 1-10% by weight of Cu, 0.5-5% by weight of Zr, and the balance of C...
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6596101 |
Preferred embodiments of the invention provide new nanostructured materials and methods for preparing nanostructured materials having increased tensile strength and ductility, increased hardness, and very fine grain sizes making such mat...
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6588092 |
Method for producing a magnetic head of a pair of magnetic core halves combined with a nonmagnetic layer therebetween including forming a winding window in at least one of a pair of generally flat oxide magnetic plates, forming at least ...
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6537389 |
A magnetically soft, moldable composite material include powder grains coated with nonmagnetic thermoplastic compounds or with molecular precursors for ceramics or with intermetallic compounds, the magnetic properties of the magnetically...
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6491765 |
The method for manufacturing alloy powder for R—Fe—B type rare earth magnets of the present invention includes a first pulverization step of coarsely pulverizing a material alloy for rare earth magnets and a second pulverization step...
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6485579 |
The invention concerns a process for the preparation of soft magnetic composite products comprising the steps of providing particles of an iron based soft magnetic material with an electrically insulating layer; optionally mixing the dry...
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6468440 |
Magnet powder has a composition expressed by (R 1 X R 2 Y B Z T 100−X−Y−Z ) 100−Q N Q (in formula, R 1 is at least one kind of element selected from rare earth elements, R 2 is at least one kind of element selected from Zr, Hf...
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6444052 |
A production method to produce an anisotropic NdFeB based alloy magnet having a high anisotropic ratio and coercivity by a simple procedure. The production method consists of a first hydrogenation process, a second hydrogenation process ...
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6423156 |
The invention relates to a process for the coating of electric steel strips with an oxide powder as annealing separator by the application of an aqueous solution which contains mainly MgO and also at least one additive, including a chlor...
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6416594 |
A heat shrink band steel sheet of the present invention comprises on the basis of percent in weight C: 0.1% or less, Si: 0.1% or less, Mn: 0.1 to 2%, P: 0.15% or less, S: 0.02% or less, sol Al: 0.08% or less, and N: 0.005% or less, or C:...
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6416593 |
A magnetic material has a composition expressed by the following general formula, general formula: {(R 1 X R 2 1-X ) Y B Z T 1-Y-Z } 1-Q N Q (where, R 1 is at least one kind of element selected from rare earth elements, R 2 is at lea...
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6406559 |
A magnetic material essentially consists of a composition represented by general formula: R 1 X R 2 Y B Z N U H V M 100-X-Y-Z-C-V (in the formula, R 1 denotes at least one kind element selected from rare earth elements, R 2 denotes at...
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6375761 |
A magnetoresistive material with two metallic magnetic phases. The material exhibits the giant magnetoresistance effect (GMR). A first phase of the material includes a matrix of an electrically conductive ferromagnetic transition metal o...
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6338761 |
With the intention of establishing fabrication methods for cheaply produced (Fe,Co)—Cr—B—R-type bonded magnets or (Fe,Co)—Cr—B—R—M-type bonded magnets containing few rare earth elements and having a coercive force iHc above...
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6245441 |
This is a composite magnetic member excellent in corrosion resistance having a chemical composition consisting essentially, by weight, of 0.30 to 0.80% C, more than 16.0% but not more than 25.0% Cr, 0.1 to 4.0% Ni, 0.1 to 0.06% N, at lea...
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6183568 |
A soft magnetic thin micro-crystalline film of Fe a B b N c (at %) wherein B is at least one of Zr, Hf, Ti, Nb, Ta, V, Mo and W, and 0<b≤20 and 0<c≤22 except the range of b≤7.5 and c≤5, shows low coercivity Hc of 80-400 ...
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6176944 |
The present invention provides a high purity cobalt sputter target having a single phase h.c.p. structure and a magnetic permeability less than the intrinsic magnetic permeability of the material. Substantially pure cobalt is cast and sl...
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6168673 |
An object of this invention is to provide a thin-film magnet having a residual magnetic flux density Br of not less than 10 kG, a cost performance equal to that of a hard ferrite magnet, and a thickness of 70-300 μm contributing to the ...
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6149736 |
A magnetostrictive material includes a rare earth element and a transition metal element, and has a plurality of spherical voids dispersed in the entire area thereof. The void content Vc is set in a range of 10%≤Vc≤40%. Thus, it is p...
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6143094 |
A method of stress inducing transformation from the austenite phase to the martensite phase by conducting cold working on material of austenite stainless steel in the temperature range from the point Ms to the point Md. The above cold wo...
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6056830 |
A rare earth permanent magnet powder having high anisotropy, that means Br/Bs of more than 0.65, is produced by applying present invented hydrogen heat treatment. The rare earth permanent magnet powder consists essentially of rare earth ...
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6053989 |
The present invention provides an amorphous or amorphous/microcrystalline metal alloy comprising Fe a Cr b V c P d Si e C f M g X h wherein M is selected from the group consisting of Cu, Ni, and mixtures thereof; X is selected fr...
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6018296 |
A resonator for use in a marker in a magnetomechanical electronic article surveillance system is formed by a planar strip of an amorphous magnetostrictive alloy having a composition Fe a Co b Ni c Si x B y M z wherein a, b, c, x, y...
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5932032 |
A process by which solid magnet bodies can be efficiently produced from mrials with soft magnetic properties using the die casting process is disclosed. The process is characterized in that an alloy comprising the alloy constituents of t...
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5916376 |
An object of the invention is to provide an inexpensive magnet having a high coercivity, high squareness ratio and high maximum energy product. According to the invention, a magnet containing R, T, N, and M wherein R is at least one rare...
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5876797 |
A method of producing doped and undoped silicon layers on a substrate by chemical vapor deposition at elevated pressures of from about 10 to about 350 Torr whereby deposition occurs at practicable rates. A substrate is loaded in a vacuum...
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