Nd-Fe-B powder
Dynamic Mechanical Behaviour of Polymer Bonded Nd Fe B Composite Materials
... NdFeB powder and fracture surfaces of composites incurred during the tensile tests are observed by JEOL JSM-5800 Scanning Electron Microscope (SEM), with an accelerating voltage of 20 ...
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Effect of Annealing on Magnetic Properties of Ultrafine Jet Milled Nd Fe B Powders
... alloy was cooled to room temperature, and the DR treatment was performed. The HDDR alloy was subjected to hydrogen decrepitation for 5 h at 200°C under a hydrogen atmosphere, and then pulverized to a powder by He ...
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Effect of Weak Magnetic Intergranular Phase on the Coercivity in the HDDR Nd Fe B Magnet
... crystalline grains of 5-10 μm in diameter, and nonmag- netic Nd-rich boundary phases [2] which interrupts the intergrain exchange coupling interaction. Thus, the grain- boundary anisotropy (GBA) of the sintered ...
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Consolidation of Fe Co Nd Dy B Glassy Powders by Spark Plasma Sintering and Magnetic Properties of the Consolidated Alloys
... between powder particles and generated plasma bythe micro discharge activates the powder ...at powder surfaces in spite of lower temperature in the whole of the compacts, although the detail on the ...
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Enhanced energy product in Y Co Fe magnets intermediate between Nd Fe B and ferrite
... analysis of the diffraction patterns was performed using FullProf. The microstructure and composition were analysed with a scanning electron microscope (SEM Carl Zeiss Evo) and an analytical field emission transmission ...
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Search for magnets with properties intermediate between Nd Fe B and Ferrite
... to powder charge ratio of 14:1 and 15:1 with 10 mm stainless steal ...As-milled powder was wrapped in a Ta foil and subjected to annealing in preheated furnace at various temperatures between 700 to 950°C ...
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Nd-rich Effects on Structural and MagneticProperties of Nd2Fe14B Magnets
... respectively. The powder was sintered at 720ºC. The characterization of magnetic properties by using VSM and phase analyse using XRD. SC-70 was used as detector with 40 kV and 30 mA (CuKα/1.5418A o ). The scan ...
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Effects of Hydrogenation Disproportionation Desorption Recombination Processing Parameters on the Particle Size of Ultrafine Jet Milled Nd Fe B Powders
... average grain size of 0.27 µm, and had the largest volume fraction of the grain boundary phase. A large number of unpulverized particles remained because the hydrogen decrepitation treatment at 200°C for 5 h before ...
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Mechanical Properties of Injection-Molded Nd-Fe-B Type Permanent Magnets
... of Nd-Fe-B type magnets offers an economically efficient means to produce ma gnets of any ...NdFeB powder is mixed with the synthetic resin ...
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Synthesis and Characterization of Directionally Solidified Nd- Fe-B alloys
... A powder specimen in the form of a flat plate is supported on a table which can be rotated about an axis perpendicular to the plane of the drawing. The X-ray source is the line focal spot on the target of the ...
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Electron Irradiation Induced Phase Transformation in Nd2Fe14B Alloy
... before electron irradiation, respectively. After irradiation for 60 s, the BFI (b) shows a featureless contrast corresponding to an amorphous phase in the central region of electron irradiation. In the SAD pattern ...
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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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The thermal expansion coefficient of Nd-Fe-B and Sm-Co permanent magnets in the region of the Curie point
... The thermal expansion of permanent magnets was investigated using a DIL-402C horizontal dilatometer [8] with holder and pushrod made of fused silica or sintered alumina. The elongation was measured by an inductive linear ...
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Electron Irradiation Induced Nano Crystallization in Fe77Nd4 5B18 5 Metallic Glass
... higher Fe composition than the dotted line were ...among Fe, Nd and B atoms. Since the atomic radius of Nd is the biggest among these three elements, dynamic displacement of Nd ...
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Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
... of Nd- rich grain boundary phase(s) with either a ...the Nd-rich phase occurred which was completed during the following cooling ...the Nd-rich phase appears with an ...of Nd-rich phase ...
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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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A Thermodynamic Modeling of the Fe Nd Sb System
... þ fT 1 þ gT 7 þ hT 9 ð 3 Þ where H i SER (298.15 K) is the molar enthalpy of the element i at 298.15 K in its Standard Element Reference (SER) state, i.e. bcc for Fe, dhcp for Nd, and rhombohedral for Sb. ...
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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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Electrodeposition of Fe Powder from Citrate Containing Electrolytes
... of Fe powders are characterized by the presence of two inflexion points, ...side, Fe powders electrodeposited from citrate-sulfate supporting electrolyte appeared in the form of spongy and sticky ...of ...
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Microstructure Analysis of High Coercivity PLD Made Nd Fe B Thick Film Improved by Tb Coating Diffusion Treatment
... Figure 2 shows a low magnification TEM bright field (BF) image of the PLD-made Nd-Fe-B thick-film with the Tb- diffusion coating treatment. One can see that the PLD-made thick-film consists fundamentally ...
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