Nd-Fe-B magnets
Micromagnetic Simulations of Magnetization Reversals in Nd Fe B Based Permanent Magnets
... hot-deformed Nd-Fe-B magnets with platelet-shape grains are expected to be lower than those of equiaxed grain structure for the same grain ...hot-deformed Nd- Fe-B ...
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Thermodynamics of Oxygen in the Fe Nd O System for Production of Dy Free Nd Fe B Magnet
... the magnets currently used, sintered Nd-Fe-B magnet has the highest magnetic properties which meet the requirements in many commercial products such as voice coil motors for hard disk drives, ...
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Optimization and comparison of flux-concentrating Nd-Fe-B generator considering variable power factor and wind conditions for a 6MW offshore wind turbine
... FC Nd-Fe-B and the SM Nd-Fe-B gives similar efficiency and SM Nd-Fe-B with variable power factor gives slightly better efficiency than others which effect on ...
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Effects of Grain Boundary Phase on Coercivity of Dysprosium Free Rare Earth Magnet
... ferrite magnets, the coercivity of Nd-Fe-B magnets decreases at high ...in Nd-Fe-B magnets used under high tem- perature ...purpose, Nd or Pr is often ...
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Magnetic Domain Structure Analysis of Nd Fe B Sintered Magnets Using XMCD PEEM Technique
... A combination of X-Ray Magnetic Circular Dichroism and PhotoEmission Electron Microscopy (XMCD-PEEM) was applied to the magnetic domain analysis of Nd-Fe-B sintered magnets. The XMCD-PEEM ...
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Modification of the Interface Nanostructure and Magnetic Properties in Nd Fe B Thin Films
... post-annealed Nd-Fe-B/Nd films enabled us to suggest that the grain size and the interface state are independent parameters for the ...coercivity Nd-Fe-B magnets by ...
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Method of making bonded or sintered permanent magnets
... In particular, the penetration of the make Nd—Fe—B alloy magnets, the powder particles reaction product layer i.e., the reactive gas species, for example, nitrogen into the droplets is l[r] ...
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Nd-rich Effects on Structural and MagneticProperties of Nd2Fe14B Magnets
... permanent magnets based rare-earth hard magnetic materials shows a high coercivity and large energy ...on Nd-Fe-B alloys prepared by the rapid quenching of the liquid, known as ...
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Search for magnets with properties intermediate between Nd Fe B and Ferrite
... The rare-earth crisis peaked in the summer of 2011 with prices of both light and heavy rare earths reaching unprecedented levels (500 $/kg for Nd, 3000 /kg for Dy). Despite a reduction to prices of about 20% of ...
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Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
... the magnets, after annealing at 500 ° C, could mean that most of the transformations occur during the subsequent cooling ...the Nd-rich phases, possibly with a favorite ...a Nd- rich phase is ...
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Permanent Rare Earth Magnets—The Need to Protect Them against Corrosion
... permanent magnets have a complex microstructure and they are susceptible to corrosion ...nickel-plated Nd-Fe-B commercial magnets were tested in a salt spray ...alloy magnets ...
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Recovery of Dy from a Mixture of Nd, Fe, B and Dy by Electrolysis in Molten LiCl
... these magnets in order to maintain their coercive force at high ...waste Fe–Nd–B sintered magnets is currently being used 1,2) ...
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Application of Rotating Arms Type Permanent Magnet Motor
... is more interested in a permanent magnet motor to save energy and reduce energy consumption. In 2015, Sun and Zhang [4] introduced a novel bi-directional energy conversion system to provide high efficiency of voltage on ...
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Transmission Electron Microscopy Study on the Grain Boundaries and Magnetic Domains in Nd–Fe–B Based Magnets
... remanent states observed under several different experimen- tal conditions, as described below. Figure 6(b) shows a result for the initial state; i.e., holography was performed imme- diately after making the thin ...
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Method of making permanent magnets
... an Nd--Fe--B alloy enriched in Nd and B) under conditions to produce protectively coated, rapidly solidified, generally spherical alloy particles wherein a majority of the particles are ...
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Dynamic Mechanical Behaviour of Polymer Bonded Nd Fe B Composite Materials
... Although NdFeB particles are of variable size and shape, they seem to be attached rather well to the matrix. According to SEM micrographs [Figs. 6(a)6(c)], it is obvious that packing density increases with rising ...
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The thermal expansion of hard magnetic materials of the Nd-Fe-B system
... of Nd-Fe-B system, as well as to clarify the question about the influence of the residual magnetization by density and thermal expansion of the ...permanent magnets with record values of the ...
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Nano Crystallization and Stability of an Amorphous Phase in Fe Nd B Alloy under 2 0 MeV Electron Irradiation
... type Fe-Nd-B permanent magnets are of considerable interest because they are suitable for use in bonded ...in Fe-Nd-B alloys with nano-crystalline structure composed of a ...
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Mechanical Properties of Injection-Molded Nd-Fe-B Type Permanent Magnets
... At all temperatures, the strain to fracture for the NyZK620, the compound containing spherical particles (Figure 4.7) is much larger than for Nylon-based compounds containing irregular shape particles (Figures 4.3 ...
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Enhanced energy product in Y Co Fe magnets intermediate between Nd Fe B and ferrite
... powder samples were rapidly annealed at 800 C for only 1–3 min, which was the optimum treatment to give the best energy product. The alternative, vacuum annealing treatment of the as-milled powders was carried out in a ...
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