THE EFFECT OF HEAT TREATMENT UNDER VARIOUS CONDITIONS ON MICROSTRUCTURE OF SINTERED (Nd,Pr,Dy)-Fe-B MAGNETS

Kód výsledku v IS VaVaI

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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 HEAT TREATMENT UNDER VARIOUS CONDITIONS ON MICROSTRUCTURE OF SINTERED (Nd,Pr,Dy)-Fe-B MAGNETS

Popis výsledku v původním jazyce

The use powder mixtures, which consists of strip-casting (Nd,Pr)-Fe-B alloy and DyH2 hydride, allows the high-coercivity magnets to be prepared.The stability of the reached high magnetic characteristics in the course of both low- and high-temperature heat treatments was shown to be related to the evolution grain structure of the magnets. The microstructure and chemical composition of the permanent magnets was studied by electron microscopy (SEM/EDX) using a Quanta 450 feg microscope. Electron microscopic studies of their microstructure have demonstrated annealing-induced changes in the thickness and continuity of (Nd,Pr,Dy)2Fe14B-phase grain boundaries and the shape of triple junctions of the grains. Electron microprobe analysis of triple junctions hasrevealed the presence of various (Nd,Pr,Dy)-O oxides such as (Nd,Pr,Dy)O, (Nd,Pr,Dy)2O3 and (Nd,Pr,Dy)O2. The studies performed allow us to conclude the effect of the heat treatment of the principal structural and magnetic characteristic

Název v anglickém jazyce

THE EFFECT OF HEAT TREATMENT UNDER VARIOUS CONDITIONS ON MICROSTRUCTURE OF SINTERED (Nd,Pr,Dy)-Fe-B MAGNETS

Popis výsledku anglicky

The use powder mixtures, which consists of strip-casting (Nd,Pr)-Fe-B alloy and DyH2 hydride, allows the high-coercivity magnets to be prepared.The stability of the reached high magnetic characteristics in the course of both low- and high-temperature heat treatments was shown to be related to the evolution grain structure of the magnets. The microstructure and chemical composition of the permanent magnets was studied by electron microscopy (SEM/EDX) using a Quanta 450 feg microscope. Electron microscopic studies of their microstructure have demonstrated annealing-induced changes in the thickness and continuity of (Nd,Pr,Dy)2Fe14B-phase grain boundaries and the shape of triple junctions of the grains. Electron microprobe analysis of triple junctions hasrevealed the presence of various (Nd,Pr,Dy)-O oxides such as (Nd,Pr,Dy)O, (Nd,Pr,Dy)2O3 and (Nd,Pr,Dy)O2. The studies performed allow us to conclude the effect of the heat treatment of the principal structural and magnetic characteristic

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Název statě ve sborníku

METAL 2014: 23rd International Conference on Metallurgy and Materials: conference proceedings : May 21st-23rd 2014, hotel Voroněž I, Brno, Czech Republic, EU

ISBN

978-80-87294-54-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1369-1374

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

21. 5. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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