Effect of Dy Addition and Heat Treatment Conditions on the Magnetic Properties of (Nd,Dy)-Fe-B-based Sintered Magnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F12%3A86084319" target="_blank" >RIV/61989100:27360/12:86084319 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Dy Addition and Heat Treatment Conditions on the Magnetic Properties of (Nd,Dy)-Fe-B-based Sintered Magnets

Popis výsledku v původním jazyce

Two production methods of sintered Nd-Fe-B magnets were compared, and the effect of heat treatment (??) regimes on magnetic properties of these magnets was studied. Sintered (Nd,Dy)-Fe-? magnets with ~3 wt.% Dy were prepared using method of single alloyand method of ?mixtures? which means the mixing of powders of a basic alloy whose composition is close to the Nd2Fe14B composition and additional low-melting Dy/Co-based alloy. Two types of post-sintering HT were used. The HT1 consists in the cooling from 950 °C to the aging temperature (Tag), 5 min aging at Tag and cooling to RT. The HT2 consists in the cooling from 950 °C to RT, repeated heating up to Tag, 5 min aging and cooling to RT. It was shown that the HT regimes affect substantially the coercive force of both types of magnets. It was also found that the aging-temperature dependences Hci(Tag) corresponding to regimes of HT1 and HT2 differ markedly. An analysis of these dependences has revealed some phase microstructure transform

Název v anglickém jazyce

Effect of Dy Addition and Heat Treatment Conditions on the Magnetic Properties of (Nd,Dy)-Fe-B-based Sintered Magnets

Popis výsledku anglicky

Two production methods of sintered Nd-Fe-B magnets were compared, and the effect of heat treatment (??) regimes on magnetic properties of these magnets was studied. Sintered (Nd,Dy)-Fe-? magnets with ~3 wt.% Dy were prepared using method of single alloyand method of ?mixtures? which means the mixing of powders of a basic alloy whose composition is close to the Nd2Fe14B composition and additional low-melting Dy/Co-based alloy. Two types of post-sintering HT were used. The HT1 consists in the cooling from 950 °C to the aging temperature (Tag), 5 min aging at Tag and cooling to RT. The HT2 consists in the cooling from 950 °C to RT, repeated heating up to Tag, 5 min aging and cooling to RT. It was shown that the HT regimes affect substantially the coercive force of both types of magnets. It was also found that the aging-temperature dependences Hci(Tag) corresponding to regimes of HT1 and HT2 differ markedly. An analysis of these dependences has revealed some phase microstructure transform

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/ED0040%2F01%2F01" target="_blank" >ED0040/01/01: Regionální materiálově technologické výzkumné centrum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2012 : 21st International Conference on Metallurgy and Materials : conference proceedings

ISBN

978-80-87294-31-4

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

1393-1397

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 5. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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