Nd-Fe-B alloy
Method of making permanent magnets
... metal alloy (e.g., an Nd--Fe--B alloy enriched in Nd and B) under conditions to produce protectively coated, rapidly solidified, generally spherical alloy particles ...
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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 ...amorphous alloy of ...
6
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 ...
7
Effect of Annealing on Magnetic Properties of Ultrafine Jet Milled Nd Fe B Powders
... 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 jet ...SC alloy was also pulverized by hydrogen decrepitation and He ...
5
Mössbauer Study on the Crystallization Process of α Fe/Nd2Fe14B type Nanocomposite Magnet Alloy
... The X-ray diffraction patterns of the ribbon alloys heat- treated at various temperatures are shown in Fig. 1. The pat- tern of the ribbon heat-treated at 500 ◦ C is quite similar to that of the as-quenched ribbon, and ...
5
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 ...
6
Search for magnets with properties intermediate between Nd Fe B and Ferrite
... of Nd-FeB type magnets and keep the coercivity stable up to 200°C, seeking a novel ultra-high-performance material to replace rare-earth magnets and (2) seek a new, low-cost material with a maximum energy product ...
184
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 ...
6
Effect of Weak Magnetic Intergranular Phase on the Coercivity in the HDDR Nd Fe B Magnet
... The component, structure and character of intergranu- lar phase sensitively depend on the alloy’s composition and processing technique. The intergranular phase is the crystalline phase with Nd2Fe14B-like structure ...
5
Laser and GTAW torch processing of Fe-Cr-B coatings on steel : Part I - melt features
... a Nd-YAG laser melted sample was 300 µm in thickness, while it was 10 times deeper for the GTAW ...Co-based alloy powder, while in the third case, a tool steel substrate was used employing a tool steel ...
16
Evaluation of the Microstructural Contribution to the Coercivity of Fine Grained Nd Fe B Sintered Magnets
... mass% Nd, ...mass% B, bal.Fe alloy powders (Intermetallics Co., Ltd.). These alloy powders, which were prepared by the jet-milling technique, were magnetically aligned, sintered, and annealed ...
5
Synthesis and Characterization of Directionally Solidified Nd- Fe-B alloys
... The alloy rod is placed inside a quartz tube mould and the temperature in the hot zone is raised above the liquidus temperature ...molten alloy is then subsequently pulled down to the solidification chamber ...
7
Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
... and the University of Tabriz-Iran for support of the general research program of which this work forms a part. Thanks are also due to Philips Components Ltd. for the provision of sintered magnets and to members of the ...
10
Effect of Chill Wheel Cooling on Magnetic Properties of Nd15Fe77B8 Alloy Powders Produced by Melt Spinning Method
... these facts, numerous studies have been made to achieve high coercivity and high energy product of Nd-Fe-B magnets to meet the industrial demands [9]. In order to attain high energy product, it is ...
9
Thermodynamics of Oxygen in the Fe Nd O System for Production of Dy Free Nd Fe B Magnet
... using Fe-23.2at%Nd alloy at 1673 ...with Nd was higher than oxygen solubility of completely melted ...Fe-23.2at%Nd alloy at 1673 K. Therefore, Nd 2 O 3 gradually ...
5
Nano Crystallization and Stability of an Amorphous Phase in Fe Nd B Alloy under 2 0 MeV Electron Irradiation
... examine phase transition during electron irradiation. Master ingots of these Fe-Nd-B alloys were prepared by arc-melting under highly purified Ar atmosphere using raw materials of pure-Fe ...
10
The thermal expansion coefficient of Nd-Fe-B and Sm-Co permanent magnets in the region of the Curie point
... Abstract. A dilatometric study results on the linear thermal expansion coefficient (LTEC) of Nd-Fe-B and Sm-Co permanent magnets are presented. The experimental data in the temperature range 200 − ...
5
Transmission Electron Microscopy Study on the Grain Boundaries and Magnetic Domains in Nd–Fe–B Based Magnets
... As demonstrated in Fig. 1, the boundary structures of samples A and B appear to be different. The grain boundaries were not very smooth (actually, they were meandering when observed by high-resolution electron ...
8
Effects of Process Parameters on the Macrostructure of a Squeeze Cast Mg 2 5 mass%Nd Alloy
... Squeeze casting is a process that has been employed for making products with better properties and near net shapes. In the squeeze casting process, a molten metal is solidified under an applied pressure during ...
6
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. ...
9