Preparation of Nd-Fe-B magnets in using TbH2 and study of their structure and magnetic properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F12%3A86084267" target="_blank" >RIV/61989100:27360/12:86084267 - 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

Preparation of Nd-Fe-B magnets in using TbH2 and study of their structure and magnetic properties

Popis výsledku v původním jazyce

The aim of work was the enhancement of coercivity of sintered Nd-Fe-B magnets without obvious reduction of the remanence by diffusing Tb onto the surface of the Nd2Fe14B matrix grains. We have studied the kinetics of TbH2 decomposition in terms of the possible application of the hydride as an effective addition for sintered Nd-Fe-B-based magnets. The diffusion dependence of the decomposition process was demonstrated; the complete decomposition of the TbH2 hydride takes place during heating to 1000 °C. Two Nd-Fe-B magnets were prepared using strip-casting alloy (free from terbium), which was refined by hydrogen decrepitation process. Terbium hydride was added to the mixture (to 2 and 4% Tb concentration in the composition), which was milled in propyl alcohol, compacted, sintered at 1070°C, and subsequently heat treated at 500°C for 2 h. Before sintering, the mixture was passivated in nitrogen flow. The low hydrogen content in the magnets prepared in using TbH2 additions indicates the co

Název v anglickém jazyce

Preparation of Nd-Fe-B magnets in using TbH2 and study of their structure and magnetic properties

Popis výsledku anglicky

The aim of work was the enhancement of coercivity of sintered Nd-Fe-B magnets without obvious reduction of the remanence by diffusing Tb onto the surface of the Nd2Fe14B matrix grains. We have studied the kinetics of TbH2 decomposition in terms of the possible application of the hydride as an effective addition for sintered Nd-Fe-B-based magnets. The diffusion dependence of the decomposition process was demonstrated; the complete decomposition of the TbH2 hydride takes place during heating to 1000 °C. Two Nd-Fe-B magnets were prepared using strip-casting alloy (free from terbium), which was refined by hydrogen decrepitation process. Terbium hydride was added to the mixture (to 2 and 4% Tb concentration in the composition), which was milled in propyl alcohol, compacted, sintered at 1070°C, and subsequently heat treated at 500°C for 2 h. Before sintering, the mixture was passivated in nitrogen flow. The low hydrogen content in the magnets prepared in using TbH2 additions indicates the co

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

COMAT 2012 : [2nd International Conference on] Recent Trends in Structural Materials : conference proceedings : November 21st-22nd 2012, Parkhotel Plzen, Czech Republic, EU

ISBN

978-80-87294-34-5

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Plzeň

Datum konání akce

21. 11. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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