Fe-Nd-B
Electron Irradiation Induced Phase Transformation in Fe Nd B Alloys
... binary Fe-Nd alloys The irradiation experiments of binary Fe-B, Fe-Nd and Nd-B alloys are very effective for investigating the dominant factors of electron ...
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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 mixture ...
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Thermal Stability and Soft Magnetic Properties of (Fe, Co) (Nd, Dy) B Glassy Alloys with High Boron Concentrations
... (Nd, Dy)–B–TM glassy alloy is discussed in the framework of the three component empirical rules 10, 11) for the achievement of large GFA. The three component rules are (1) multicom- ponent systems ...
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Electron Irradiation Induced Nano Crystallization in Fe77Nd4 5B18 5 Metallic Glass
... interest as a superior hard magnetic material. 3,4) Nanocrystal- line structure is obtained by several thermal processes such as rapid solidification and thermal crystallization of an amor- phous phase. 5,6) A large ...
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Electron Irradiation Induced Phase Transformation in Nd2Fe14B Alloy
... compound did not maintain its original structure under electron irradiation and was transformed to an amorphous phase through solid-state amorphization. With further electron irradiation, crystallization of the amorphous ...
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Recovery of Dy from a Mixture of Nd, Fe, B and Dy by Electrolysis in Molten LiCl
... tors of hybrid automobiles. Dysprosium (Dy) is added to these magnets in order to maintain their coercive force at high temperature. Dy is mined in only a few countries; therefore, maintaining a stable and constant ...
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A Thermodynamic Modeling of the Fe Nd Sb System
... In Fig. 7, the calculated phase equilibria of the thermody- namic section at 870 K using the present thermodynamic parameters are in good agreement with the experimental data in the composition range of ³33100 at% Sb ...
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Transmission Electron Microscopy Study on the Grain Boundaries and Magnetic Domains in Nd–Fe–B Based Magnets
... unchanged at this stage. Increasing the applied magnetic field to 240 kA/m reversed the magnetization in one of the previously unchanged grains (see Fig. 7(e)). The last grain underwent magnetization reversal in a higher ...
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Effects of Grain Boundary Phase on Coercivity of Dysprosium Free Rare Earth Magnet
... The microstructures of the conventional and developed specimens were observed by SEM, as shown in Fig. 2. As shown in Fig. 2 (a), in the conventional specimen, a grain boundary is hardly observed between the grains but ...
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Thermodynamics of Oxygen in the Fe Nd O System for Production of Dy Free Nd Fe B Magnet
... 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, industrial motors and generators, ...
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Phase Stability of an Amorphous Phase Against Electron Irradiation Induced Crystallization in Fe Based Metallic Glasses
... crystalline precipitates with grain size of about 100500 nm are embedded in the amorphous phase and each precipitate dispersed inhomogeneously. The thermal stabil- ity, crystallization behavior, phase selection and ...
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Evaluation of the Microstructural Contribution to the Coercivity of Fine Grained Nd Fe B Sintered Magnets
... grains was evaluated for the aspect ratio as for grain size. The average aspect ratios of samples A, B and C were 0.79, 0.76 and 0.75, respectively. As shown in Fig. 6, the number fraction of the grains with a low ...
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Magnetic Domain Structure Analysis of Nd Fe B Sintered Magnets Using XMCD PEEM Technique
... respectively. These alloys were pulvelized to obtain fine powders of approximately 3 mm in average diameter and were pressed in a magnetic field followed by sintering and tempering. The samples were cut 7 mm square and 1 ...
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Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
... A, B and C, which had already been annealed at 500 ° C for 1 hr and subsequently F-cooled to RT, at 500 ° C (in magnet B) or at 600 ° C (in magnets A and C) for 1 hr, followed by AC to RT, the deterioration ...
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Consolidation of Fe Co Nd Dy B Glassy Powders by Spark Plasma Sintering and Magnetic Properties of the Consolidated Alloys
... concluded to have the further advantage point of much higher glass forming abilityso that glass transition and supercooled liquid region can be observed, as well as that of another B- rich type nanocomposite ...
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The thermal expansion coefficient of Nd-Fe-B and Sm-Co permanent magnets in the region of the Curie point
... The experimental data on the linear thermal expansion coefficient of permanent magnets are obtained with high accuracy for the first time. The regions of magnetic phase transitions in detail are studied and the critical ...
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Effect of Annealing on Magnetic Properties of Ultrafine Jet Milled Nd Fe B Powders
... the Nd-rich phase is strongly related to the change in coercivity during annealing for the Nd-Fe-B ...the Nd-rich phase) in the jet-milled powders was analyzed by ...
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Search for magnets with properties intermediate between Nd Fe B and Ferrite
... for Nd-Fe-B based magnets is approximately 60% of the total ac- cording to the estimated breakdown of the world market for permanent magnets in 2010 ...sintered Nd − Fe − ...
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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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Modification of the Interface Nanostructure and Magnetic Properties in Nd Fe B Thin Films
... the Nd overlayer and annealed at 500 °C ...the Nd oxide also in this ...sintered Nd-Fe-B magnets is that the Nd 2 Fe 14 B core is not ...
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