Effect of Low-Temperature Annealing on the Structure and Hysteretic Properties of Nd-Fe-B Magnets Prepared with Hydride-Containing Powder Mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F14%3A86090237" target="_blank" >RIV/61989100:27360/14:86090237 - 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 Low-Temperature Annealing on the Structure and Hysteretic Properties of Nd-Fe-B Magnets Prepared with Hydride-Containing Powder Mixtures

Popis výsledku v původním jazyce

The effect of low-temperature treatment on the structure and hysteretic properties of Nd-Fe-B magnets, which were prepared using strip-casting alloy (wt.%) Nd -24%, Pr ? 6.5%, Dy ? 0.5%, B ? 1 %, Al ? 0.2%, Fe ? balance and 2 wt.% DyH2 addition, has beenstudied. Hysteretic properties of the magnets subjected to the optimum heat treatment are Br = 1.29 T, jHc = 1309 kA/m, Hk = 1220 kA/m, (BH)max = 322 kJ/m3. The subsequent combined heat treatment at 250 to 500°C (for 20 h) does not change the hystereticproperties. The degradation of magnetic properties (decrease in jHc and Hk to 1105 and 960 kA/m, respectively) is observed only after the repeated annealing at 550 °C. The hysteretic properties of the magnets can be restored completely by heat treatment1050 °C (1 h) + 500 °C (2 h). The data obtained demonstrate the higher thermal stability of hysteretic properties of magnets prepared from hydride-containing powder mixtures. The observed effect is attributed to the formation of a non-un

Název v anglickém jazyce

Effect of Low-Temperature Annealing on the Structure and Hysteretic Properties of Nd-Fe-B Magnets Prepared with Hydride-Containing Powder Mixtures

Popis výsledku anglicky

The effect of low-temperature treatment on the structure and hysteretic properties of Nd-Fe-B magnets, which were prepared using strip-casting alloy (wt.%) Nd -24%, Pr ? 6.5%, Dy ? 0.5%, B ? 1 %, Al ? 0.2%, Fe ? balance and 2 wt.% DyH2 addition, has beenstudied. Hysteretic properties of the magnets subjected to the optimum heat treatment are Br = 1.29 T, jHc = 1309 kA/m, Hk = 1220 kA/m, (BH)max = 322 kJ/m3. The subsequent combined heat treatment at 250 to 500°C (for 20 h) does not change the hystereticproperties. The degradation of magnetic properties (decrease in jHc and Hk to 1105 and 960 kA/m, respectively) is observed only after the repeated annealing at 550 °C. The hysteretic properties of the magnets can be restored completely by heat treatment1050 °C (1 h) + 500 °C (2 h). The data obtained demonstrate the higher thermal stability of hysteretic properties of magnets prepared from hydride-containing powder mixtures. The observed effect is attributed to the formation of a non-un

Druh

O - Ostatní výsledky

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.30.0016" target="_blank" >EE2.3.30.0016: Příležitost pro mladé výzkumníky</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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