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Tytuł:
Wpływ warunków środowiskowych na starzenie magnesów trwałych Nd-Fe-B
Application properties of permanent magnets Nd-Fe-B
Autorzy:
Drak, M.
Dobrzański, L.A.
Powiązania:
https://bibliotekanauki.pl/articles/1374783.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
magnes trwały
starzenie
odporność korozyjna
Opis:
The paper presents results of corrosion wear of bonded and sintered hard magnetic materials Nd-Fe-B and magnets covered by protective polymer, lacquer and metal coatings. Corrosion tests were made in the water and in 5% NaCl solution environment. It was found that the bonded magnets with the polymer matrix demonstrate better corrosion resistance than the sintered magnets. Employment of the protective coatings on the Nd-Fe-B bonded magnets surfaces may feature the effective protection of the substrate material from the corrosive action of the aggressive agent. Analysis of the surface topography of the deposited protective coatings makes it possible to determine coating defects resulting from the action of the aggressive agent. The best protection from the corrosive environment is provided by the polymer coatings. Lower corrosion protection by protective coating was found in the case of sintered magnets. The corrosion damage process of magnets covered with the protective coatings starts in the coating failure location and is connected with the further damage proceeding both into the material and on its surface.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2006, 74; 135-140
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-coercivity Nd-Fe-B Powders Obtained by High-Temperature Milling
Wysokokoercyjne proszki Nd-Fe-B otrzymywane przez mielenie w wysokiej temperaturze
Autorzy:
Kaszuwara, W.
Michalski, B.
Orlowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/355400.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hard magnetic materials
Nd-Fe-B
mechanical alloying
mechanical milling
twarde materiały magnetyczne
mechaniczna synteza
obróbka mechaniczna
Opis:
The possibility of employing high temperature milling (600°C) for the production of highly coercive Nd-Fe-B powders was examined. The materials were the Nd12Fe82B6, alloy which was subjected to mechanical milling and the powders of the constituent elements of this alloy which were processed by mechanical alloying. The processes were conducted in the two variants: the first variant consisted of mechanical milling performed at a high temperature which was maintained during the entire process, and the other variant included preliminary milling carried out at room temperature and then the milling temperature was increased. All the processes gave nanocrystalline powders with hard magnetic properties. The powders produced by mechanical milling had better properties than those produced by mechanical] alloying as they were more homogeneous and contained smaller amounts of the α-Fe phase.
W pracy badano możliwości zastosowania procesu mielenia w wysokiej temperaturze (600°C) do otrzymywania wyso- kokoercyjnych proszków Nd-Fe-B. Mieleniu poddano stop Nd12Fe82B6,. a także zastosowano metodę mechanicznej syntezy stopów tzn. mielono proszki pierwiastków składników stopu. Procesy prowadzono w dwóch wariantach: cały proces odbywał się w podwyższonej temperaturze lub stosowano wstępne mielenie w temperaturze pokojowej, a następnie mielenie w wysokiej temperaturze. We wszystkich procesach uzyskano nanokrystalicze proszki o właściwościach magnetycznie twardych Proszki uzyskane w procesie mielenia stopu miały właściwości lepsze od proszków otrzymanych w procesie mechanicznej syntezy stopów, ponieważ były bardziej jednorodne i posiadały mniejszy udział fazy α-Fe.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 1; 47-50
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti) alloys
Autorzy:
Hasiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/147728.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Opis:
The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti) materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd8Fe78B14 alloy leads to creation of an ineligible amount of the magnetically hard Nd2Fe14B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd8Fe79–xB13Mx (x = 4; M = Re or Ti) alloys are also analyzed.
Źródło:
Nukleonika; 2015, 60, 1; 29-33
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multistep Heat-Treatment Effects on Electrospun Nd-Fe-B-O Nanofibers
Autorzy:
Jeon, E. J.
Eom, N. S. A.
Lee, J.
Lee, B.
Cho, H. M.
On, J. S.
Choa, Y.-H
Kim, B. S.
Powiązania:
https://bibliotekanauki.pl/articles/354311.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Nd-Fe-B
nanofibers
electrospinning
heat treatment
Opis:
Neodymium-Iron-Boron (Nd-Fe-B) magnets are considered to have the highest energy density, and their applications include electric motors, generators, hard disc drives, and MRI. It is well known that a fiber structure with a high aspect ratio and the large specific surface area has the potential to overcome the limitations, such as inhomogeneous structures and the difficulty in alignment of easy axis, associated with such magnets obtained by conventional methods. I n this work, a suitable heat-treatment procedure based on single-step and multistep treatments to synthesize sound electrospun Nd-Fe-B-O nanofibers of Φ572 nm was investigated. The single-step heat-treated (directly heat-treated at 800°C for 2 h in air) samples disintegrated along with the residual organic compounds, whereas the multistep heat-treated (sequential three-step heat-treated including three steps;: dehydration (250°C for 30 min in an inert atmosphere), debinding (650°C for 30 min in air), and calcination (800°C for 1 h in air)) fibers maintained sound fibrous morphology without any organic impurities. They could maintain such fibrous morphologies during the dehydration and debinding steps because of the relatively low internal pressures of water vapor and polymer, respectively. In addition, the NdFeO3 alloying phase was dominant in the multistep heat-treated fibers due to the removal of barriers to mass transfer in the interparticles.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1433-1437
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymer - Bonded Magnetic Materials with Various Nd-Fe-B Filler Content
Autorzy:
Grujić, A.
Lazić, N.
Talijan, N.
Spasojević, V.
Stajić-Trošić, J.
Ćosović, V.
Aleksić, R.
Powiązania:
https://bibliotekanauki.pl/articles/1538172.pdf
Data publikacji:
2010-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
81.05.Qk
83.85.Vb
46.35.+z
81.70.Pg
91.60.Pn
68.37.Hk
Opis:
One of the more important developments in magnetic materials, polymer bonded magnets, have opened a new world of application opportunities. The Nd-Fe-B/polymer composite materials offer an excellent combination of strong magnetic and dynamical-mechanical properties. However, the transition temperatures of filler and matrix should be selected carefully considering the future application. Uniform particle distribution and good adhesion between Nd-Fe-B powder particles and polymer are essential for the quality of the composite, while stiffness of polymer matrix is one of the influencing factors as well. The damping properties of Nd-Fe-B/polymer composites with 15 wt.%, 50 wt.% and 75 wt.% of Nd-Fe-B powder were studied by dynamic mechanical analysis and compared with a pure polymer sample. Thermal stability was analyzed using a simultaneous differential scanning calorimetric and thermogravimetric analysis technique.
Źródło:
Acta Physica Polonica A; 2010, 117, 5; 859-863
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Properties of Nd-Fe-B Alloy Subjected to HDDR Process
Autorzy:
Szymański, M.
Michalski, B.
Leonowicz, M.
Miazga, Z.
Powiązania:
https://bibliotekanauki.pl/articles/352047.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HDDR
magnets hydrogenation
Nd-Fe-B alloy
neodymium magnets
magnets recycling
Opis:
In this paper the Hydrogenation, Disproportionation, Desorption and Recombination (HDDR) route was tested, for the Nd-Fe-B master alloy, as a prospective procedure for recycling of sintered scrap neodymium magnets. The HDDR method is based on the hydrogen induced reversal phase transformation of Nd-Fe-B alloy: Nd2Fe14B + (2±x) H2 = 2NdH2±x + Fe2B + 12Fe. Microstructural observations (SEM), phase constitution studies (XRD) and measurement of magnetic properties (VSM) were done to investigate the HDDR transformation progress. It was observed that disproportionation reaction starts at the grain boundaries, where the Nd-rich phase is located. Average grain size was reduced and coercive material was produced as a result of the HDDR process. Obtained results are similar to literature data.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 217-220
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
57Fe Mössbauer effect study of Nd-Fe-B hybrid bonded magnets
Autorzy:
Płusa, D.
Olszewski, J.
Dośpiał, J.
Powiązania:
https://bibliotekanauki.pl/articles/148344.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bonded magnets
Mössbauer effect
coercivity
remanence
Opis:
An investigation of magnetic interaction between the particles of hybrid bonded magnets based on mixtures of Nd-(Fe,Co)-B and strontium ferrite powders was carried out. An enhancement of the magnet remanence and coercivity caused by the interaction between their components was observed. From Mössbauer effect study, it results that this enhancement can be correlated with the increase of an average hyperfine field at Fe sites in Nd-(Fe,Co)-B magnets with the strontium ferrite addition.
Źródło:
Nukleonika; 2007, 52, supl. 1; 89-92
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consolidation of Nanocrystalline Nd-Fe-B Powder by Hydrostatic Extrusion at High Temperature
Autorzy:
Gizynski, T.
Kaszuwara, W.
Kulczyk, M.
Leonowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030247.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
Opis:
Hydrostatic extrusion is a modern method of shaping material microstructure and properties. Hydrostatic extrusion can also be successfully used for consolidation of hard magnetic powders. The effect of extrusion temperature, within the range of 700-800°C, on the magnetic properties of the bulk, final product was studied. A commercial MQU-F42 powder, dedicated to hot pressing, was placed in copper capsules and initially cold compacted up to 60% of the theoretical density. Subsequently, the billet was heated in an oven to temperatures 700 and 800°C, respectively and subjected to hydrostatic extrusion. The extruded product had a form of a copper rod, with the Nd-Fe-B core, having 96% of theoretical density (true strain 1.85 after extrusion at 800°C). The extrusion process led to deterioration of the coercivity, for which coarsening of the Nd₂Fe₁₄B grains was blamed. In order to prove this hypothesis, the starting powder was annealed in a temperature range of 550-900°C for various times. The crystallite size, measured after annealing by the X-ray diffraction method, showed that with extension of time and elevation of the temperature the crystallite size increases, however the dominating parameter is the temperature. Correlation of the crystallite size with temperature indicates that when the crystallites are larger than 80 nm the magnetic properties dramatically decrease. Additionally, after HE at 800°C micrometric size Nd-rich phase appear in the microstructure. The Nd is squeezed from the grain boundary of the Nd₂Fe₁₄B phase leading to non-isolated grains, which also contributes to the deterioration of the coercivity.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1260-1263
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Bulk and Thin Nd₂Fe₁₄B Films after Corrosion Action
Autorzy:
Constantin, V.
Neacşu, E.
Popescu, A.
Galyas, A.
Demidenko, O.
Yanushkevich, K.
Powiązania:
https://bibliotekanauki.pl/articles/1385675.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
75.50.Bb
75.50.Vv
75.70.-i
Opis:
The corrosion action for bulk and thin Nd₂Fe₁₄B films magnets in different corrosion media was studied. The thin Nd-Fe-B films of 100 nm ≤ d ≤ 1000 nm were deposited on glass substrate by "flash" evaporation method. The structure and microstructure of the samples were studied by X-ray diffraction analysis, scanning electron microscopy. The temperature dependence of the magnetization before and after corrosion action was carried out by ponderomotive method in the temperature range 80 ≤ T ≤ 800 K. It is shown that the specific magnetizations of the thin Nd-Fe-B films with d ≥ 1000 nm are comparable to those measured for the powder samples. The values of the coercive and saturation fields were determined from the hysteresis loops measurements.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 368-370
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microscopic characteristic of Nd-Fe-B magnets structure - magnets recovered from electric motors
Autorzy:
Kapustka, K.
Ziegmann, G.
Sdrenka, S.
Elwert, T.
Klimecka-Tatar, D.
Powiązania:
https://bibliotekanauki.pl/articles/108989.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
NdFeB magnets
rare earth elements
microscopic analysis
structure of NdFeB
materiały magnetyczne twarde
struktura NdFeB
analiza mikroskopowa
Opis:
The rare earths (RE) are characterized with their strong metallic atomic bonds. They are used in magnetic materials used in computer technology and electric powered vehicles. The advancing globalization and the increasing standard of living both lead to massive waste disposal problems, therefore, the methods of recovering used metallic materials are sought. In this paper, the microscopic characteristic of magnetic powder from old electric engines has been presented.
Źródło:
Archiwum Wiedzy Inżynierskiej; 2017, 2, 1; 39-41
2544-2449
Pojawia się w:
Archiwum Wiedzy Inżynierskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Complex Characteristics of Sintered Nd-Fe-B Magnets in Terms of Hydrogen Based Recycling
Autorzy:
Szymański, M.
Michalski, B.
Leonowicz, M.
Miazga, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1032966.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
Opis:
Sintered Nd-Fe-B magnets, dismantled by the P.P.H.U. Polblume company from scrap hard disc drives and medical device, were thermally demagnetized and analyzed in terms of their chemical composition, structure and magnetic properties. Magnets from hard disc drives drives had a magnetic structure of two opposite poles in a plane of a magnet and were covered with a nickel coating (around 50 μ m in thick), which however was often discontinuous and deeply scratched. The majority of the magnets were partially destroyed (broken or corroded). The magnet from hard disc drives were basically made of iron (65±1 wt%) and neodymium (30±2 wt%) however, they also included alloying elements such as Co (1-2.5 wt%), Dy (0-1 wt%) or Pr (0-5 wt%). The magnets from medical device consisted only of iron (65±1 wt%) and neodymium (34±1 wt%). Magnets of both kinds were textured thus their XRD patterns were amended. Diffraction patterns, typical for the Nd₂Fe₁₄B (φ) phase, were achieved after mechanical crushing of the bulk magnets. A regular X-ray diffraction pattern was achieved after mechanical crushing of the magnets. The microstructure of both types of the magnets, observed by scanning electron microscopy, consisted of grey grains of a Nd₂Fe₁₄B (φ) phase and a Nd-rich grain boundary phase. The magnets from hard disc drives exhibited excellent magnetic properties and anisotropy: maximum energy product above 300 kJ/m³, remanence around 1.4 T and coercivity around 1000 kA/m, slightly varying between each magnet. Magnetic properties of medical magnet were only a little worse: maximum energy product above 200 kJ/m³, remanence around 1.1 T and coercivity around 900 kA/m. Hydrogen disproportionation phase diagrams (temperature vs. pressure) were constructed for both kinds of the magnets, revealing possible conditions for the hydrogenation, disproportionation, desorption and recombination reaction.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1270-1273
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie metod obliczeniowych do projektowania obwodów magnetycznych z dielektromagnesami Nd-Fe-B przeznaczonych do napędów elektrycznych
Application of mathematical methods to design magnetic circuits with Nd-Fe-B dielectromagnets for electrical drives
Autorzy:
Piotrowska-Kokot, E.
Ślusarek, B.
Powiązania:
https://bibliotekanauki.pl/articles/159244.pdf
Data publikacji:
2003
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
magnesy trwałe
napęd elektryczny
Opis:
Obecnie dobór magnesu do obwodu magnetycznego napędu elektromagnetycznego z podtrzymaniem magnesem trwałym, odbywa się na drodze testowania modelu. Doświadczenie konstruktora i dostępne na rynku materiały mają wpływ na rodzaj konstrukcji obwodu magnetycznego w takim napędzie. Współczesna technologia pozwala na wytwarzanie dielektromagnesów o oczekiwanych przez konstruktora właściwościach. Dotyczy to zarówno właściwości fizycznych, takich jak właściwości magnetyczne, mechaniczne, elektryczne i termiczne, ale także kształtu geometrycznego jak i topografii biegunów magnetycznych. Opracowany w Instytucie Elektrotechniki program wyznaczania charakterystyk dynamicznych z użyciem programu MatLab, umożliwia obliczanie złożonych obwodów magnetycznych napędów elektromagnetycznych. Program ten, wspomagany programem F!ux2D, pozwala na wytypowanie magnesu trwałego o optymalnych dla danej konstrukcji właściwościach fizycznych, kształcie i konfiguracji biegunów magnetycznych. Ułatwia to i skraca proces projektowania napędów elektrycznych przeznaczonych dla konkretnych urządzeń. W artykule przedstawiono dobór dielektromagnesów Nd-Fe-B przeznaczonych do obwodu magnetycznego wytypowanego napędu elektrycznego.
Presently the permanent magnet's selection for magnetic circuit of electromagnetic drive are performed by model testing. Designer's experience and materials accessible on the market decide of the construction of magnetic circuit in projected drive. Today's technology allows to produce dielectromagnets with properties requested by designer. Such possibility concern both physical properties of dielectromagnets as magnetic, mechanical, electrical and thermal properties and also shape and dimensions and magnet's poles configuration. Designed in Electrotechnical Institute computer programme with MatLab programme utilisation is intended to calculate the complicated magnetic circuits of electromagnetic drives. Such programme supported with Flux2D allows to select permanent magnet with physical properties, shape and poles configuration optimal for specific construction. It makes easier and cut short designing process of electric drives for specific devices. The papers present the selection of Nd-Fe-B dielectromagnets for magnetic circuit of some electrical drives.
Źródło:
Prace Instytutu Elektrotechniki; 2003, 216; 53-63
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Properties of Magnets Obtained by Hydrostatic Extrusion of Nd-Fe-B Powder
Autorzy:
Gizynski, T.
Kaszuwara, W.
Pawlik, P.
Kulczyk, M.
Leonowicz, M.
Michalski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1387955.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
Opis:
Nd-Fe-B MQ powder was initially densified in a copper capsule to reach about 60% of the theoretical density. Subsequently, three various processes of hydrostatic extrusion were conducted at room temperature. The values of true strain, obtained during the all three stages, were 1.38, 0.89, 0.94, respectively. The investigation performed showed that the coercivity of the material decreases as the strain increases. Decrease of the remanence was observed only for the highest strains. Size of the particles was strongly reduced during the extrusion processes. X-ray diffraction did not show changes in the phase structure of the material. The Mössbauer study, of the sample extruded within all the three stages, showed existence of the Nd₂Fe₁₄B phase and 16% of other phase. Analysis of magnetization versus temperature confirmed that the additional phase was ferromagnetic.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 626-628
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of Nd-Fe-B Morphology as Function of the PVP Concentration Using Electrospinning Process
Autorzy:
Eom, Nu Si A.
Haq, Muhammad Aneeq
Lee, Jimin
Lim, Kyoung Mook
Kim, Taek-Soo
Choa, Yong-Ho
Kim, Bum Sung
Powiązania:
https://bibliotekanauki.pl/articles/351180.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Nd2Fe14B
1-D magnet fiber
electrospinning
magnet properties
morphology
Opis:
In this study, we demonstrate a facile and cost-effective way to synthesize Nd-Fe-B of various shapes such as powders, rods and fibers using electrospinning, heat-treatment and washing procedures. Initially Nd-Fe-B fibers were fabricated using electrospinning. The as-spun Nd-Fe-B fibers had diameters ranging 489 to 630 nm depending on the PVP concentration in reaction solutions. The different morphologies of the Nd2Fe14B magnetic materials were related to the difference in thickness of the as-spun fibers. The relationships between the as-spun fiber thickness, the final morphology, and magnetic properties were briefly elucidated. The intrinsic coercivity of Nd2Fe14B changed with the change in morphology from powder (3908 Oe) to fiber (4622 Oe). This work demonstrates the effect of the Nd-Fe-B magnetic properties with morphology and can be extended to the experimental design of other magnetic materials.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 993-996
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of the magnetization reversal processes in nanocrystalline Nd-Fe-B alloys doped by Nb
Autorzy:
Kaźmierczak, M.
Pawlik, P.
Wysłocki, J.
Wnuk, I.
Gębara, P.
Pawlik, K.
Przybył, A.
Powiązania:
https://bibliotekanauki.pl/articles/1052622.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Sg
75.50.Bb
Opis:
In the following article the magnetic properties and phase composition of (Nd₁₀Fe₆₇B₂₃)_{100-x}Nb_{x} (where x=5, 6, 7, 8, 9) alloys in the form of ribbons are discussed. The X-ray diffraction studies revealed the coexistence of amorphous and nanocrystalline structures consisting of Nd₂Fe₁₄B, Nd_{1+ε}Fe₄B₄ and metastable Nd₂Fe₂₃B₃ phases. The shape of M_{rev} (M_{irr}) suggests that the magnetization reversal proceeds through the nucleation of the reversal domain for the ribbon doped with 5-7 at.% of Nb and the subsequent pinning of the domain walls for ribbons doped with 8 and 9 at.% of Nb.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 789-791
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 55

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