Structural and phase composition modification of nanocrystalline Nd14Fe79B7 allloy during thermomagnetic measurements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F09%3A00339981" target="_blank" >RIV/68081723:_____/09:00339981 - 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

Structural and phase composition modification of nanocrystalline Nd14Fe79B7 allloy during thermomagnetic measurements

Popis výsledku v původním jazyce

Changes in the microstructure phase composition and magnetic properties of rapid quenched Nd-rich Nd14Fe79B7 alloy as caused by thermomagnetic measurement (TM) were studied using XRD methods of phase analysis, crystallite size and lattice microstrain determination. The changes were analysed between the optimized magnetic state and state after TM up to 800 degrees C. Measurement of magnetic properties was on the SQUID magnetometer at ambient temperature. The obtained experimental results show that the investigated alloy in the optimized magnetic state has nearly monophase composition with predominant content of hard magnetic Nd2Fe14B phase (up to 95 mass %) with mean crystallite size below 60 nm. In the state after TM, it was found that the decreased amount of Nd2Fe14B phase (75 mass %), increased amount of soft magnetic phases, predominantly of Fe7Nd5, formation of Nd-rich oxide Nd2O3 phase, as well as grain growth have caused the observed quality loss of hard magnetic properties.

Název v anglickém jazyce

Structural and phase composition modification of nanocrystalline Nd14Fe79B7 allloy during thermomagnetic measurements

Popis výsledku anglicky

Changes in the microstructure phase composition and magnetic properties of rapid quenched Nd-rich Nd14Fe79B7 alloy as caused by thermomagnetic measurement (TM) were studied using XRD methods of phase analysis, crystallite size and lattice microstrain determination. The changes were analysed between the optimized magnetic state and state after TM up to 800 degrees C. Measurement of magnetic properties was on the SQUID magnetometer at ambient temperature. The obtained experimental results show that the investigated alloy in the optimized magnetic state has nearly monophase composition with predominant content of hard magnetic Nd2Fe14B phase (up to 95 mass %) with mean crystallite size below 60 nm. In the state after TM, it was found that the decreased amount of Nd2Fe14B phase (75 mass %), increased amount of soft magnetic phases, predominantly of Fe7Nd5, formation of Nd-rich oxide Nd2O3 phase, as well as grain growth have caused the observed quality loss of hard magnetic properties.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/1M0512" target="_blank" >1M0512: Centrrum výzkumu práškových nanomateriálů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Journal of Mining and Metallurgy

ISSN

1450-5339

e-ISSN

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Svazek periodika

45

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

SR - Surinamská republika

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000273016600012

EID výsledku v databázi Scopus

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