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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Michalski, Bartosz
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022In situ alloying of NiTi: Influence of laser powder bed fusion (LBPF) scanning strategy on chemical compositioncitations
- 2022Heat Treatment of NiTi Alloys Fabricated Using Laser Powder Bed Fusion (LPBF) from Elementally Blended Powderscitations
- 2021Effect of severe deformation on the microstructure and properties of Nd-Fe-B powders caused by hydrostatic extrusioncitations
- 2019Monitoring of the hydrogen decrepitation process by acoustic emissioncitations
- 2019Effect of silver content in Zr<inf>55</inf>Cu<inf>30</inf>Ni<inf>5</inf>Al<inf>10−x</inf>Ag<inf>X</inf> alloys on the supercooled liquid stability analysed by TTT diagrams
- 2017Complex Characteristics of Sintered Nd–Fe–B Magnets in Terms of Hydrogen Based Recyclingcitations
- 2016Hydrogen disproportionation phase diagram and magnetic properties for Nd<inf>15</inf>Fe<inf>79</inf>B<inf>6</inf> alloycitations
- 2013Effect of microstructure changes on magnetic properties of spark plasma sintered Nd-Fe-B powderscitations
- 2012Processing the Nd-Fe-B powders by high temperature millingcitations
- 2012Magnetic properties of Nd 12Fe 82B 6 and Nd 14Fe 80B 6 powders obtained by high temperature milling
- 2011Characterization of nanostructured Nd-Fe-Al permanent magnetscitations
- 2011Correlation between the size of Nd<inf>60</inf>Fe<inf>30</inf>Al <inf>10</inf> sample, cast by various techniques and its coercivity
- 2008Effect of processing parameters on the structure and magnetic properties of Nd60Fe30Al10 alloycitations
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article
Characterization of nanostructured Nd-Fe-Al permanent magnets
Abstract
<p>Rapidly solidified Nd<sub>60</sub>Fe<sub>30</sub>Al<sub>10</sub> alloys produced in the form or ribbons or 1 and 5 mm diameter rods were examined using transmission electron microscopy (TEM), XRD, magnetic measurements, and Mössbauer spectroscopy. Strong dependence of the structure and magnetic properties on cooling rate was proved. The present work concerns the microstructure on the nanometric level (HRTEM) of the Nd<sub>60</sub>Fe <sub>30</sub>Al<sub>10</sub> alloy. The specimens were in a form of 1 and 5 mm diameter rods and a rapidly solidified ribbons, prepared at a roll speed of 30 m/s. The high-resolution images shown large regions where the crystalline phase is present. The size of the crystallites depends on the quenching rate, which also influences the composition of the amorphous phase. In both, ribbon and rod samples, well defined boundaries of nanoscale grains of similar crystallographic orientations were observed. Basing on the observations in the dark field, we can say that the precipitates often form agglomerates whose components maintain the same crystallographic orientations. The studies revealed that the crystalline grains are frequently separated by a narrow layer of an intermediate phase. The EDS examinations reveal that the individual crystallites differ in their chemical composition, but in all nano-regions examined, all the components of the alloy occur simultaneously, in the proportions varying around the average composition of the alloy. © 2011 Elsevier B.V. All rights reserved.</p>