Electrochemical corrosion tests of Nd-Fe-B-based magnetic materials with modified structure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10247251" target="_blank" >RIV/61989100:27360/21:10247251 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1742-6596/1758/1/012038/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/1742-6596/1758/1/012038/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/1758/1/012038" target="_blank" >10.1088/1742-6596/1758/1/012038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical corrosion tests of Nd-Fe-B-based magnetic materials with modified structure

Popis výsledku v původním jazyce

The wide application of Nd-Fe-B permanent magnets in addition to the rare-earth metal resourceconstrains determine the necessity of their recycling. One of approaches to magnet-to-magnet recycling consists in using the grain boundary modification of sintered magnet material, which includes the grain-boundary diffusion (GBD) and grain-boundary structuring (GBS). The preparation of magnets with the modified structure determines a need for research their corrosion resistance. The corrosion resistance of magnets prepared by powder blending techniques, namely, magnets, which were recycled from hard-disk drivers, in using Dy/NdH2 additions in the powder mixture and magnets, which were prepared from strip-casting alloy, in using TbH2 hydride in the powder mixture, is studied. The corrosion potential and polarization resistance were measured, and the average corrosion rate was estimated based on polarization measurements of the magnet samples in the aqueous solution 0.1 M NaCl. Furthermore, a pitting resistance corrosion test was conducted and the values of pittingand repassivation potential were determined. The corrosive properties of the magnet samples are discussed from the viewpoint of the phase compositions of the material. (C) Published under licenceby IOP Publishing Ltd.

Název v anglickém jazyce

Electrochemical corrosion tests of Nd-Fe-B-based magnetic materials with modified structure

Popis výsledku anglicky

The wide application of Nd-Fe-B permanent magnets in addition to the rare-earth metal resourceconstrains determine the necessity of their recycling. One of approaches to magnet-to-magnet recycling consists in using the grain boundary modification of sintered magnet material, which includes the grain-boundary diffusion (GBD) and grain-boundary structuring (GBS). The preparation of magnets with the modified structure determines a need for research their corrosion resistance. The corrosion resistance of magnets prepared by powder blending techniques, namely, magnets, which were recycled from hard-disk drivers, in using Dy/NdH2 additions in the powder mixture and magnets, which were prepared from strip-casting alloy, in using TbH2 hydride in the powder mixture, is studied. The corrosion potential and polarization resistance were measured, and the average corrosion rate was estimated based on polarization measurements of the magnet samples in the aqueous solution 0.1 M NaCl. Furthermore, a pitting resistance corrosion test was conducted and the values of pittingand repassivation potential were determined. The corrosive properties of the magnet samples are discussed from the viewpoint of the phase compositions of the material. (C) Published under licenceby IOP Publishing Ltd.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20500 - Materials engineering

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)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Journal of Physics: Conference Series. Volume 1758

ISBN

—

ISSN

1742-6588

e-ISSN

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Počet stran výsledku

9

Strana od-do

—

Název nakladatele

IOP Publishing

Místo vydání

Bristol

Místo konání akce

Suzdal

Datum konání akce

5. 10. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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