Abstract: A permanent magnet includes a rare earth element R; a transition metal element T; and B. The permanent magnet includes Nd as R. The permanent magnet includes Fe as T. The permanent magnet contains main phase grains and R-rich phases. The main phase grains include R, T, and B. The R-rich phases include R. The main phase grains observed in a cross section of the permanent magnet are flat. The cross section is parallel to an easy magnetization axis direction of the permanent magnet. Each of the R-rich phases is located between the main phase grains. An average value of intervals between the R-rich phases in a direction substantially perpendicular to the easy magnetization axis direction is from 30 ?m to 1,000 ?m. An average value of lengths of short axes of the main phase grains observed in the cross section is from 20 nm to 200 nm.

Abstract: An R-T-B based permanent magnet includes a rare earth element R, a transition metal element T, and B. The permanent magnet includes at least Nd as R. The permanent magnet includes at least Fe as T. The permanent magnet contains main phase grains and R-rich phases. The main phase grains include at least R, T, and B. The R-rich phases include at least R. The main phase grains observed in a cross section of the permanent magnet are flat. The cross section is parallel to an easy magnetization axis direction of the permanent magnet. Each of the R-rich phases is located between the main phase grains. An average value of intervals between the R-rich phases in the easy magnetization axis direction is from 5 ?m to a width of the permanent magnet in the easy magnetization axis direction.

Abstract: A sintered magnet body (RaT1bMcBd) coated with a powder mixture of an intermetallic compound (R1iM1j, R1xT2yM1z, R1iM1jHk), alloy (M1dM2e) or metal (M1) powder and a rare earth (R2) oxide is diffusion treated. The R2 oxide is partially reduced during the diffusion treatment, so a significant amount of R2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.

Abstract: Disclosed is a sintered body composition used in improved diffusion efficiency of heavy rare earth elements RH, and related sintered permanent magnet and preparation methods. The sintered body includes Nd2Fe14B crystal phase as a primary phase, and a rare earth rich phase as a grain boundary phase. The sintered body includes a composition expressed by RaBbGacCudAleMfCogFebalance; wherein R is one or more selected from rare earth elements, and R includes Nd; M is one or more selected from the group consisting of Zr, Ti, and Nb; and wherein “a” satisfies 13%?a?15.3%; “b” satisfies 5.4%?b?5.8%; “c” satisfies 0.05%?c?0.25%; “d” satisfies 0.08%?d?0.3%; “e” satisfies 0?e?1.2%; “f” satisfies 0.08%?f?0.2%; and “g” satisfies 0.8%?g?2.5%. Grains in Nd2Fe14B crystal phase have average size L of 4-8 ?m, and the relationship between L and t for grain boundary phases average thickness is: ?=t/L, wherein ? is defined as 0.009???0.012.

Abstract: Provided are Ce/Co/Cu permanent magnet alloys containing certain refractory metals, such as Ta and/or Hf, and optionally Fe which represent economically more favorable alternative to Sm-based magnets with respect to both material and processing costs and which retain and/or improve magnetic characteristics useful for GAP MAGNET applications.

Abstract: A permanent magnet for a motor, a rotor assembly having the permanent magnet, a motor, and a compressor are disclosed. The permanent magnet has a Nd—Fe—B-based main phase. The main phase has a grain size of smaller than or equal to 4 micrometers. The mass ratio of dysprosium and/or terbium in the permanent magnet is less than or equal to 0.5%. The intrinsic coercivity Hcj of the permanent magnet at 25° C. satisfies Hcj?1500 kA/m. The permanent magnet according to embodiments of the present disclosure can have fewer or no heavy rare-earth elements, and meanwhile exhibit excellent performance, which improves the cost performance.

Abstract: A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.

Abstract: A sintered magnet body (RaT1bMcBd) coated with a powder mixture of an intermetallic compound (R1iM1j, R1xT2yM1z, R1iM1jHk), alloy (M1dM2e) or metal (M1) powder and a rare earth (R2) oxide is diffusion treated. The R2 oxide is partially reduced during the diffusion treatment, so a significant amount of R2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.

Abstract: A samarium-iron-nitrogen alloy powder according to one embodiment of the present invention is characterized in that a value obtained by dividing the hydrogen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 400 ppm/(m2/g), and a value obtained by dividing the oxygen content of the samarium-iron-nitrogen alloy powder by the BET specific surface area of the samarium-iron-nitrogen alloy powder is less than or equal to 11,000 ppm/(m2/g).

Abstract: Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.

Abstract: A coating tank 1 provided with a net belt passage opening is prepared, a slurry obtained by dispersing a rare-earth-compound powder in a solvent is continuously supplied to the coating tank 1 to cause the coating tank 1 to overflow, and a plurality of sintered magnet bodies 10 are arranged on a net belt conveyor 5, continuously conveyed horizontally thereon, and passed through the slurry in the coating tank 1 via the net belt passage opening, to apply the slurry to the sintered magnet bodies. The slurry is subsequently dried to continuously apply the powder to the plurality of sintered magnet bodies. As a result, the rare-earth-compound powder can be uniformly applied to the surfaces of the sintered magnet bodies, and the application operation can be performed extremely efficiently.

Abstract: A method and system for sensing and controlling temperature with magnetic fields are provided. The method comprises placing a compound in thermal communication with a number of temperature or heat sources and placing a number of magnets in thermal communication with the compound. A number of magnetic sensors are placed in electromagnetic communication with the number of magnets. Changes in the magnetic field of the magnets are detected by the sensors and used to determine the temperature of the compound according to a model that maps magnetic field characteristics to temperature. The amount of cure of the compound can then be estimated from the temperature. The temperature or heat sources are controlled in response to the temperature measurement and the estimated amount of cure of the compound.

Abstract: A magnetocaloric material comprising a La—Fe—Si based alloy composition that is compositionally modified to include a small but effective amount of at least one of Al, Ga, and In to improve mechanical stability of the alloy (substantially reduce alloy brittleness), improve thermal conductivity, and preserve comparable or provide improved magnetocaloric effects. The alloy composition may be further modified by inclusion of at least one of Co, Mn, Cr, and V as well as interstitial hydrogen.

Abstract: A permanent magnet may include a Fe16N2 phase in a strained state. In some examples, strain may be preserved within the permanent magnet by a technique that includes etching an iron nitride-containing workpiece including Fe16N2 to introduce texture, straining the workpiece, and annealing the workpiece. In some examples, strain may be preserved within the permanent magnet by a technique that includes applying at a first temperature a layer of material to an iron nitride-containing workpiece including Fe16N2, and bringing the layer of material and the iron nitride-containing workpiece to a second temperature, where the material has a different coefficient of thermal expansion than the iron nitride-containing workpiece. A permanent magnet including an Fe16N2 phase with preserved strain also is disclosed.

Abstract: A method of preparing a permanent magnet nanocomposite. The method includes melting a precursor alloy having a hard magnetic phase and a magnetically soft phase. The hard magnetic phase has less than a stoichiometric amount of rare earth metal or noble metal. The melted precursor is cast into flakes and milled into a powder. The powder may then be pressure crystalized.

Abstract: Provided are a highly thermostable rare-earth permanent magnetic material, a preparation method thereof and a magnet containing the same. A composition of the rare-earth permanent magnetic material by an atomic percentage is as follows: SmxRaFe100-x-y-z-aMyNz, wherein R is at least one of Zr and Hf, M is at least one of Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn and Al, x+a is 7-10%, a is 0-1.5%, y is 0-5% and z is 10-14%.

Abstract: A rare earth magnet includes main phase grains having an R2T14B type crystal structure. The main phase grains include C. A concentration ratio A1 (A1=?C/?C) of the main phase grains is 1.50 or more, where ?C and ?C are respectively a highest concentration of C and a lowest concentration of C in one main phase grain.

Abstract: A micro fabricated electromagnetic device and method for fabricating its component structures, the device having a layered magnetic core of a potentially unlimited number of alternating insulating and magnetic layers depending upon application, physical property and performance characteristic requirements for the device. Methods for fabricating the high performing device permit cost effective, high production rates of the device and its component structures without any degradation in device performance resulting from component layering.

Abstract: A method for producing an NdFeB sintered includes forming a layer containing Dy and/or Tb on the surface of an NdFeB sintered magnet base material and then performing a grain boundary diffusion process for diffusing Dy and/or Tb from the aforementioned layer through the crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than the sintering temperature thereof. In this method: a) the content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %; b) the aforementioned layer is a powder layer formed by depositing a powder; and c) the powder layer contains Dy and/or Tb in a metallic state by an amount equal to or higher than 50 mass %.

Abstract: A coating tank 1 provided with a net belt passage opening is prepared, a slurry obtained by dispersing a rare-earth-compound powder in a solvent is continuously supplied to the coating tank 1 to cause the coating tank 1 to overflow, and a plurality of sintered magnet bodies 10 are arranged on a net belt conveyor 5, continuously conveyed horizontally thereon, and passed through the slurry in the coating tank 1 via the net belt passage opening, to apply the slurry to the sintered magnet bodies. The slurry is subsequently dried to continuously apply the powder to the plurality of sintered magnet bodies. As a result, the rare-earth-compound powder can be uniformly applied to the surfaces of the sintered magnet bodies, and the application operation can be performed extremely efficiently.

Abstract: The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry.

Abstract: A method for improvement of magnetic performance of sintered NdFeB magnet includes the following steps. Firstly, material containing element R, H and X is to be covered on a surface of the sintered NdFeB magnet to form a finish coat. After that, proceed with a diffusion treatment and an aging treatment to the sintered NdFeB magnet with the finish coat in the environment of vacuum or inert gas. R is at least one of such elements as Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. H is hydrogen. X is at least one of such elements as C, O, N, S, B, Cl and Si.

Abstract: A rare earth magnet includes main phase grains having an R2T14B type crystal structure. The main phase grains include B. A concentration ratio A (A=?B/?B) of the main phase grains is 1.05 or more, where ?B and ?B are respectively a highest concentration of B and a lowest concentration of B in one main phase grain.

Abstract: A tool to differentially compress a powder material comprises a differential compression piston and a support. The piston comprises a first part configured to apply a pressure on a first region of an external surface of the powder material. The piston comprises a second part with a recess which is located at a lateral distance from the first part and which is configured to face a second region of the external surface of the powder material. The tool further comprises a membrane that can be deformed by the piston. The deformable membrane is configured to at least partially retain the powder material in the tool.

Abstract: A NdFeB magnet containing cerium and a manufacturing method thereof are provided. The manufacturing method includes steps of: refining a part of raw materials pure iron, ferro-boron, and rare earth fluoride in a crucible, adding a rest of the raw materials into the crucible and refining, casting a refined solution to a surface of a water-cooled rotation roller through a tundish and forming alloy flakes, processing the alloy flakes containing at least two different compositions with hydrogen decrepitation, milling powders, magnetic field pressing, vacuum presintering, machining and sintering, and obtaining the NdFeB magnet containing cerium. The NdFeB magnet containing cerium has a density of 7.5-7.7 g/cm3 and an average particle size of 3-7 ?m; comprises a main phase and a grain boundary phase distributed around the main phase. A composite phase containing Tb is provided between the main phase and the grain boundary phase.

Abstract: The invention relates to a method for pressing a green compact (1) for producing a sintered molded part from a sintering powder, according to which the sintering powder is filled into a mold cavity (43a) of a die (43), and then the sintering powder is pressed by at least one punch, which is pushed at least partly into the mold cavity (43a), to form a green compact (1), wherein to form an undercut in the green compact (1) a portion of the sintering powder is pushed by a punch out of a first plane of the die (43) by forming an opening (11) in the first plane in pressing direction into a second plane of the die (11) different from the first plane. The invention also relates to a device (12) for performing said method and a correspondingly produced sintered molded part.

Abstract: A magnetic sensor device includes: a magnetic circuit for forming a magnetic field, a magnetoresistance effect element, and a heat dissipater. The magnetoresistance effect element outputs changes in the magnetic field as changes in a resistance value, and is arranged on a surface (of a +Z side) of the magnetic circuit at a conveyance path side thereof. The heat dissipater is arranged in close contact with the magnetic circuit at the opposite side thereof (?Z side) from the conveyance path.

Abstract: A sintered magnet body (RaT1bMcBd) coated with a powder mixture of an intermetallic compound (R1iM1j, R1xT2yM1z, R1iM1jHk), alloy (M1dM2e) or metal (M1) powder and a rare earth (R2) oxide is diffusion treated. The R2 oxide is partially reduced during the diffusion treatment, so a significant amount of R2 can be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.

Abstract: A step of, while a powder of an RLM alloy (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) which is produced through atomization and a powder of an RH compound (where RH is Dy and/or Tb) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 65 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH compound powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH compound=9.6:0.4 to 5:5.

Abstract: A magnetic sheet comprises, by vol. %, Fe—Si—Al alloy flat powder: 36% or more. The Fe—Si—Al alloy flat powder comprises, by wt %, 9.3%?Si?9.7%, 5.7%?Al?6.1%, and remaining Fe. The Fe—Si—Al alloy flat powder has: an aspect ratio in a range of 20 or more and 50 or less; a 50% particle size D50 in a range of 50 ?m or more and 100 ?m or less; and a coercivity Hc of 60 A/m or less. The magnetic sheet has a temperature characteristic of permeability ?? measured at 1 MHz exhibiting a maximum value in a range of 0° C. or more and 40° C. or less.

Abstract: A bulk high performance permanent magnet comprising a neodymium-iron-boron core having an outer surface, and a coercivity-enhancing element residing on at least a portion of said outer surface, with an interior portion of said neodymium-iron-boron core not having said coercivity-enhancing element therein. Also described herein is a method for producing the high-coercivity bulk permanent magnet, the method comprising: (i) depositing a coercivity-enhancing element on at least a portion of an outer surface of a neodymium-iron-boron core substrate to form a coated permanent magnet; and (ii) subjecting the coated permanent magnet to a pulse thermal process that heats said outer surface to a substantially higher temperature than an interior portion of said neodymium-iron-boron core substrate, wherein said substantially higher temperature is at least 200° C.

Abstract: A step is provided which performs a heat treatment at the sintering temperature of a sintered R-T-B based magnet or lower, while a powder of an RLM alloy (where RL is Nd and/or Pr; M is one or more selected from among Cu, Fe, Ga, Co and Ni) and a powder of an RH fluoride (where RH is Dy and/or Tb) are present on a surface of the sintered R-T-B based magnet. The RLM alloy contains RL in an amount of 50 at % or more, and a melting point of the RLM alloy is equal to or less than a temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH fluoride powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH fluoride=96:4 to 5:5.

Abstract: A high-performance NdFeB permanent magnet including a nitride phase and a production method thereof are provided. A main phase of the NdFeB permanent magnet has a structure of R2T14B; a grain boundary phase is distributed around the main phase and contains N, F, Zr, Ga and Cu; a composite phase containing R1, Tb and N exists between the main phase and the grain boundary phase and includes a phase having a structure of (R1, Tb)2T14(B, N). R represents at least two rare earth elements, and includes Pr and Nd; T represents Fe, Mn, Al and Co; R1 represents at least one rare earth element, and includes at least one of Dy and Tb; the main phase contains Pr, Nd, Fe, Mn, Al, Co and B; and the grain boundary phase further contains at least one of Nb and Ti. Through placing partially B by N, a magnetic performance is increased.

Abstract: A rotor, a rotary electric machine, and a rotor production method that reduce parts count, allow easy fixing, and prevent displacement. The rotor includes a rotor core having a cylindrical shape and a plurality of insertion holes, and a sensor magnet having an annular shape and placed coaxially with the rotor core, in which the sensor magnet has a plurality of protrusions protruding toward the rotor core, the plurality of protrusions are inserted into the plurality of insertion holes, and the rotor core and the sensor magnet are firmly fixed to each other by resin.

Abstract: A high-performance permanent magnet is provided. The magnet is expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t. The magnet includes a sintered body including: a plurality of crystal grains each having a Th2Zn17 crystal phase; and a plurality of grain boundaries between the crystal grains. If an oxide phase of the R element is defined by a continuous region that is disposed in the sintered body and contains the R element and oxygen having a concentration of 85 atomic percent or more, a ratio of the number of the oxide phases in the grain boundaries to the number of the crystal grains is 1.1 or less.

Abstract: A step of, while a powder of an RLM alloy (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) and a powder of an RH compound (where RH is Dy and/or Tb; and the RH compound is one, or two or more, selected from among an RH fluoride, an RH oxide, and an RH oxyfluoride) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 65 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH compound powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH compound=9.6:0.4 to 5:5.

Abstract: The disclosure describes magnetic materials including iron nitride, bulk permanent magnets including iron nitride, techniques for forming magnetic materials including iron nitride, and techniques for forming bulk permanent magnets including iron nitride.

Abstract: The object of the present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which is capable of obtaining a bonded magnet molded product having a good magnetic force and a magnetic waveform as well as high iHc and Hk by injection molding. The present invention aims at providing a bonded magnet molded product using the ferrite particles and the resin composition. The aforementioned object of the present invention can be achieved by ferrite particles for bonded magnets which have a crystal distortion of not more than 0.14 as measured by XRD, and an average particle diameter of not less than 1.30 ?m as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the resin composition.

Abstract: A high-performance NdFeB permanent magnet produced with NdFeB scraps and a production method thereof are provided. The production method includes steps of: under a vacuum condition, sending a portion of raw materials, including pure iron, ferro-iron, the NdFeB scraps and rare earth fluorides, into a crucible, refining, and obtaining a first melting liquid; absorbing slags by a slag cleaning device, and moving the slag cleaning device out; sending a rest of raw materials into the crucible, refining the first melting liquid and the rest of raw materials in the crucible, and obtaining a second melting liquid; pouring the second melting liquid after refining onto a surface of a water-cooled rotation roller through a tundish, and forming alloy flakes; processing the alloy flakes with hydrogen decrepitation, milling the alloy flakes into powders by a jet mill, then magnetic field pressing, presintering and sintering.

Abstract: A method for fabricating a non-planar magnet includes extruding a precursor material including neodymium iron boron crystalline grains into an original anisotropic neodymium iron boron permanent magnet having an original shape, wherein the original anisotropic neodymium iron boron permanent magnet has at least about 90 percent neodymium iron boron magnetic material by volume. The original anisotropic neodymium iron boron permanent magnet is heated to a deformation temperature. The original anisotropic neodymium iron boron permanent magnet is deformed into a reshaped anisotropic neodymium iron boron permanent magnet having a second shape substantially different from the original shape using heated tooling to apply a deformation load to the original anisotropic neodymium iron boron permanent magnet.

Abstract: An R-T-B-based rare earth sintered magnet, comprising a rare earth element R, B, a metallic element M which includes one or more metals selected from Al, Ga and Cu, a transition metal T which includes Fe as a main component, and inevitable impurities, wherein the sintered magnet includes 13 atom % to 15.5 atom % of R, 5.0 atom % to 6.0 atom % of B, 0.1 atom % to 2.4 atom % of M, and T and the inevitable impurities as a balance, and wherein the sintered magnet includes 0.015 atom % to 0.10 atom % of Zr as the transition metal T.

Abstract: A step of, while an RLM alloy powder (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) and an RH compound powder (where RH is Dy and/or Tb; and the RH compound is an RH fluoride and/or an RH oxyfluoride) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 50 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH compound powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH compound=9.6:0.4 to 5:5.

Abstract: A step of, while an RLM alloy powder (where RL is Nd and/or Pr; M is one or more elements selected from among Cu, Fe, Ga, Co, Ni and Al) and an RH oxide powder (where RH is Dy and/or Tb) are present on the surface of a sintered R-T-B based magnet, performing a heat treatment at a sintering temperature of the sintered R-T-B based magnet or lower is included. The RLM alloy contains RL in an amount of 50 at % or more, and the melting point of the RLM alloy is equal to or less than the temperature of the heat treatment. The heat treatment is performed while the RLM alloy powder and the RH oxide powder are present on the surface of the sintered R-T-B based magnet at a mass ratio of RLM alloy:RH oxide=9.6:0.4 to 5:5.

Abstract: The present invention provides an R-T-B based sintered magnet having an R-T-B based compound as main phase grains, wherein, the content of Zr contained in the R-T-B based sintered magnet is 0.3 mass % to 2.0 mass %, the main phase grains have Zr, and the R-T-B based sintered magnet have main phase grains with the mass concentration of Zr at the edge portion of the main phase grain being 70% or less of that at the central portion of the main phase grain at the cross-section of the main phase grain.

Abstract: The present invention provides a method for preparing a rare earth permanent magnet material. The preparation method of the present invention comprises atomizing spray process and infiltrating process, wherein the atomizing-sprayed sintered rare earth magnet is placed in a closed container before infiltrating. Through the atomizing spray process a solution containing a heavy rare earth element is coated on the surface of a sintered R1-Fe(Co)—B-A-X-M rare earth magnet, and after baking, heat treatment is performed to infiltrate the sprayed heavy rare earth element to the grain boundary phase of the sintered rare earth magnet. This method decreases the amount of a heavy rare earth element used, increases the coercive force of magnets with a little decrease of remanence, decreases the remanence temperature coefficient and coercive force temperature coefficient of the magnet, and improves resistance of the magnet against demagnetization at a high temperature.

Abstract: An internally segmented magnet is disclosed. The magnet may include a first layer of a permanent magnetic material, a second layer of a permanent magnetic material, and an insulating layer separating the first and second layers. The insulating layer may include a ceramic mixture of at least a first ceramic material and a second ceramic material. The mixture having a melting point of up to 1,100° C. and may be a eutectic, or near eutectic, composition. The magnet may be formed by forming a first layer of powdered permanent magnetic material, depositing an insulating layer over the first layer, depositing a second layer of powdered permanent magnetic material over the insulating layer to form an internally segmented magnet stack, and sintering the magnet stack. The ceramic materials may include a halogen and an alkaline earth metal, alkali metal, or a metal having a +3 or +4 oxidation state.

Abstract: A method to separate rare earth material from a rare earth magnet. At least one embodiment comprises a method that heats a provided rare earth magnet to at least 600° C. whereby the rare earth magnet absorbs a dry gas. Separated rare earth materials are created. Magnetic rare earth materials are produced from the separated rare earth materials.

Abstract: A rare earth magnet is prepared by disposing a R1-T-B sintered body comprising a R12T14B compound as a major phase in contact with an R2-M alloy powder and effecting heat treatment for causing R2 element to diffuse into the sintered body. The alloy powder is obtained by quenching a melt containing R2 and M. R1 and R2 are rare earth elements, T is Fe and/or Co, M is selected from B, C, P, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb, and Bi.

Abstract: An R-T-B based sintered magnet having R2T14B crystal grains and a grain boundary formed by two or more adjacent R2T14B crystal grains. An R—Co—Cu—N concentrated part whose concentrations of R, Co, Cu and N are respectively higher than those in the R2T14B crystal grains may be in the grain boundary. An R—O—C concentrated part or an R—O—C—N concentrated part may be further provided in the grain boundary.

Abstract: Provided is a high-strength, bonded La(Fe, Si)13-based magnetocaloric material, as well as a preparation method and use thereof. The magnetocaloric material comprises magnetocaloric alloy particles and an adhesive agent, wherein the particle size of the magnetocaloric alloy particles is less than or equal to 800 ?m and are bonded into a massive material by the adhesive agent; the magnetocaloric alloy particle has a NaZn13-type structure and is represented by a chemical formula of La1-xRx(Fe1-p-qCopMnq)13-ySiyA?, wherein R is one or more selected from elements cerium (Ce), praseodymium (Pr) and neodymium (Nd), A is one or more selected from elements C, H and B, x is in the range of 0?x?0.5, y is in the range of 0.8?y?2, p is in the range of 0?p?0.2, q is in the range of 0?q?0.2, ? is in the range of 0???3.0. Using a bonding and thermosetting method, and by means of adjusting the forming pressure, thermosetting temperature, and thermosetting atmosphere, etc.