The effect of hydrogen decrepitation process and heat treatment on magnetic properties and structure of sintered Nd-Fe-B magnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F11%3A86081208" target="_blank" >RIV/61989100:27360/11:86081208 - 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

The effect of hydrogen decrepitation process and heat treatment on magnetic properties and structure of sintered Nd-Fe-B magnets

Popis výsledku v původním jazyce

Sintered Nd-Fe-B based magnets were prepared by traditional powder metallurgy by the following two methods: i) preparation of sintered magnets without hydrogen assisted processing, and ii) using the hydrogen decrepitating process (HD) as one of preparation stages of as-cast alloys for crushing. On the basis of thermokinetic measurements a conclusion is made that the heat treatment of sintered magnets has strong effect on the amounts of absorbed hydrogen in Nd2Fe14B and an intergranular Nd-rich phases. Acorrelation between structural changes and hysteresis properties of heat treated permanent magnets has been established. It was suppose that the transformations of Nd-rich phase microstructure owing to absorption-desorption hydrogen could be the reasonof changes in coercivity of sintered magnets with heat treatment.

Název v anglickém jazyce

The effect of hydrogen decrepitation process and heat treatment on magnetic properties and structure of sintered Nd-Fe-B magnets

Popis výsledku anglicky

Sintered Nd-Fe-B based magnets were prepared by traditional powder metallurgy by the following two methods: i) preparation of sintered magnets without hydrogen assisted processing, and ii) using the hydrogen decrepitating process (HD) as one of preparation stages of as-cast alloys for crushing. On the basis of thermokinetic measurements a conclusion is made that the heat treatment of sintered magnets has strong effect on the amounts of absorbed hydrogen in Nd2Fe14B and an intergranular Nd-rich phases. Acorrelation between structural changes and hysteresis properties of heat treated permanent magnets has been established. It was suppose that the transformations of Nd-rich phase microstructure owing to absorption-desorption hydrogen could be the reasonof changes in coercivity of sintered magnets with heat treatment.

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

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

20th Anniversary International Conference on Metallurgy and Materials: METAL 2011

ISBN

978-80-87294-24-6

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

1058-1062

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

18. 5. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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