Double sintering in manufacturing thermostable Pr-Dy-Fe-Co-B-Cu-Al permanent magnets

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F16%3A86099559" target="_blank" >RIV/61989100:27360/16:86099559 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Double sintering in manufacturing thermostable Pr-Dy-Fe-Co-B-Cu-Al permanent magnets
Original language description
The use of double sintering and rare-earth metal hydride additions allows us to substantially increase the hysteretic parameters of sintered permanent magnets having the composition (wt.%): Pr-14.7, Dy-16.9, Co-24.4, B-1.2, Al-0.3, Cu-0.15, Fe balance. The following magnetic characteristics were reached: B-r = 0.95 T, H-j(c) = 1640kA/m, H-k = 1370kA/m, BHmax = 176 kJ/m(3), temperature coefficient of induction vertical bar alpha vertical bar<0.01 (T=-60 degrees C to +100 degrees C). The found weak dependence of structure-sensitive parameters, such as jHc and Hk on the cooling rate from the low-temperature heat-treatment temperature (500 degrees C) is discussed in connection with the invar and magnetostrictive behavior of the principal magnetic phase (Pr,Dy)2(Fe, Co)14B at temperatures below the Curie temperature, which were used for the low-temperature treatment. Measurements of temperature dependences of the electrical resistivity of the magnets allowed us to demonstrate the presence and absence of the electrical-resistivity anomaly corresponding to the Curie temperature for magnets free from cobalt and with high cobalt content, respectively.
Czech name
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Czech description
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Project
<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU
ISBN
978-80-87294-67-3
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
1432-1438
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 25, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000391251200234

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