Structure and Magnetic Properties of Nd-Fe-B Magnets Prepared from DyH2-Containing Powder Mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F18%3A10241394" target="_blank" >RIV/61989100:27360/18:10241394 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1134/S2075113318030115" target="_blank" >http://dx.doi.org/10.1134/S2075113318030115</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S2075113318030115" target="_blank" >10.1134/S2075113318030115</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure and Magnetic Properties of Nd-Fe-B Magnets Prepared from DyH2-Containing Powder Mixtures

Popis výsledku v původním jazyce

Sintered Nd-Pr-Dy-Fe-B permanent magnets were prepared by a powder blending technique using mixtures consisting of strip-casting alloy (wt %) 24.0 Nd, 6.5 Pr, 0.5 Dy, 1.0 B, 0.2 Al, 65.8 Fe and 2 wt % DyH2 dysprosium hydride. After optimum heat treatment of magnets at 500oC for 1 h, the following hysteretic characteristics were reached: remanence Br = 1.29 T; coercive force jHc = 1309 kA/m; critical field Hk = 1220 kA/m; and the maximum energy product (BH)max = 322 kJ/m3. The characteristic peculiarity of the magnets prepared from hydride-containing power mixtures is the stability of hysteretic properties in the course of subsequent stepped annealings or progressive heatings at temperatures of 250-500oC for, in total, more than 20 h. Conditions of low-temperature annealings resulting in the degradation and subsequent restoration of hysteretic properties of magnets are determined. The evolution of the microstructure and phase composition of magnets in the course of heat treatments was studied by X-ray diffraction analysis and scanning electron microscopy, and the correlation between the structural changes and hysteretic properties of magnets is discussed. (C) 2018, Pleiades Publishing, Ltd.

Název v anglickém jazyce

Structure and Magnetic Properties of Nd-Fe-B Magnets Prepared from DyH2-Containing Powder Mixtures

Popis výsledku anglicky

Sintered Nd-Pr-Dy-Fe-B permanent magnets were prepared by a powder blending technique using mixtures consisting of strip-casting alloy (wt %) 24.0 Nd, 6.5 Pr, 0.5 Dy, 1.0 B, 0.2 Al, 65.8 Fe and 2 wt % DyH2 dysprosium hydride. After optimum heat treatment of magnets at 500oC for 1 h, the following hysteretic characteristics were reached: remanence Br = 1.29 T; coercive force jHc = 1309 kA/m; critical field Hk = 1220 kA/m; and the maximum energy product (BH)max = 322 kJ/m3. The characteristic peculiarity of the magnets prepared from hydride-containing power mixtures is the stability of hysteretic properties in the course of subsequent stepped annealings or progressive heatings at temperatures of 250-500oC for, in total, more than 20 h. Conditions of low-temperature annealings resulting in the degradation and subsequent restoration of hysteretic properties of magnets are determined. The evolution of the microstructure and phase composition of magnets in the course of heat treatments was studied by X-ray diffraction analysis and scanning electron microscopy, and the correlation between the structural changes and hysteretic properties of magnets is discussed. (C) 2018, Pleiades Publishing, Ltd.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Inorganic Materials: Applied Research

ISSN

2075-1133

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

509-516

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85048130718