Use of hydrogen-containing rem-based additions in designing re-fe-b magnetic materials
The result's identifiers
Result code in 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>
Alternative codes found
RIV/61989100:27360/20:10245739
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Use of hydrogen-containing rem-based additions in designing re-fe-b magnetic materials
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20500 - Materials engineering
Result continuities
Project
<a href="/en/project/LTARF18031" target="_blank" >LTARF18031: Development of physico-chemical and engineering foundations for the initiation of innovative resources-economy technology of high-power and high-coercivity (Nd,R)-Fe-B (R = Pr, Tb, Dy, Ho) low-REM permanent magnets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
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
—
Number of pages
7
Pages from-to
964-970
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 20, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—