Use of hydrogen-containing rem-based additions in designing re-fe-b magnetic materials
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F20%3A10245739" target="_blank" >RIV/61989100:27240/20:10245739 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/61989100:27360/20:10245739
Výsledek na webu
<a href="https://www.confer.cz/metal/2020/3591-use-of-hydrogen-containing-rem-based-additions-in-designing-re-fe-b-magnetic-materials" target="_blank" >https://www.confer.cz/metal/2020/3591-use-of-hydrogen-containing-rem-based-additions-in-designing-re-fe-b-magnetic-materials</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.37904/metal.2020.3591" target="_blank" >10.37904/metal.2020.3591</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Use of hydrogen-containing rem-based additions in designing re-fe-b magnetic materials
Popis výsledku v původním jazyce
The focusing of new technologies on the formation of inhomogeneous distributions of heavy rare-earth metals (REMs) in hard magnetic Nd-Fe-B materials is of scientific importance for increasing their functional properties, along with preserving existing sources of heavy REMs. The manufacturing process for these materials includes strip-casting, hydrogen decrepitation, and treatments in a hydrogen atmosphere, as well as high-energy milling combined with mechanical alloying of multicomponent powder mixtures. The role of alloying REMs and their alloys with transition metals on the formation of phase composition, microstructure, fine structure of grains, and the hysteretic properties of hard magnetic (RR')2Fe14B-based materials were investigated. These addition were introduced in the form of hydrides or hydrogenated alloys (TbHx, DyHx, ScHx, Tb3(Co,Cu), Dy3(Co,Cu)) to initial Nd(Pr)-Fe-B-based powder mixtures in the course of their mechanical activation. The new knowledge about the formation of the structured state of (RR')2Fe14B-phase grains, namely, the formation of compositional inhomogeneities of heavy REMs within grains was obtained. The core-shell grain structure so formed and the nonuniformity of the main hard magnetic phase lead to increases in the structure-sensitive magnetic parameters and to their higher stability during low-temperature annealing. The powder-blending manufacturing process allows us to prepare magnets with a wide range of hysteretic characteristics using unified initial Nd-Fe-B strip-casting alloys. (C) 2020 TANGER Ltd., Ostrava.
Název v anglickém jazyce
Use of hydrogen-containing rem-based additions in designing re-fe-b magnetic materials
Popis výsledku anglicky
The focusing of new technologies on the formation of inhomogeneous distributions of heavy rare-earth metals (REMs) in hard magnetic Nd-Fe-B materials is of scientific importance for increasing their functional properties, along with preserving existing sources of heavy REMs. The manufacturing process for these materials includes strip-casting, hydrogen decrepitation, and treatments in a hydrogen atmosphere, as well as high-energy milling combined with mechanical alloying of multicomponent powder mixtures. The role of alloying REMs and their alloys with transition metals on the formation of phase composition, microstructure, fine structure of grains, and the hysteretic properties of hard magnetic (RR')2Fe14B-based materials were investigated. These addition were introduced in the form of hydrides or hydrogenated alloys (TbHx, DyHx, ScHx, Tb3(Co,Cu), Dy3(Co,Cu)) to initial Nd(Pr)-Fe-B-based powder mixtures in the course of their mechanical activation. The new knowledge about the formation of the structured state of (RR')2Fe14B-phase grains, namely, the formation of compositional inhomogeneities of heavy REMs within grains was obtained. The core-shell grain structure so formed and the nonuniformity of the main hard magnetic phase lead to increases in the structure-sensitive magnetic parameters and to their higher stability during low-temperature annealing. The powder-blending manufacturing process allows us to prepare magnets with a wide range of hysteretic characteristics using unified initial Nd-Fe-B strip-casting alloys. (C) 2020 TANGER Ltd., Ostrava.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
20500 - Materials engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/LTARF18031" target="_blank" >LTARF18031: Vývoj fyzikálně-chemických a inženýrských základů pro iniciaci inovativní úsporné technologie výroby vysoce výkonných permanentních magnetů na bázi (Nd,R)-Fe-B (R = Pr, Tb, Dy, Ho) s nízkým obsahem kovů vzácných zemin</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
METAL 2020 : 29th International Conference on Metallurgy and Materials : conference proceedings : May 20-22, 2020, Brno, Czech Republic, EU
ISBN
978-80-87294-97-0
ISSN
2694-9296
e-ISSN
—
Počet stran výsledku
7
Strana od-do
964-970
Název nakladatele
Tanger
Místo vydání
Ostrava
Místo konání akce
Brno
Datum konání akce
20. 5. 2020
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
—