Structure and phase composition of Tb3Co0.6Cu0.4 alloys for efficient additions to Nd-Fe-B sintered magnets
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10238193" target="_blank" >RIV/61989100:27360/17:10238193 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Structure and phase composition of Tb3Co0.6Cu0.4 alloys for efficient additions to Nd-Fe-B sintered magnets
Original language description
Currently, many attempts have been taken to enhance the coercivity and reduce the heavy rare-earth consumption of Nd-Fe-B sintered magnets simultaneously. Some progresses have been made in efforts to introduce Dy and/or Tb in many forms, namely, oxides, fluorides, hydrides, intermetallic compounds and alloys. The Tb3Co0.6Cu0.4 composition was suggested to apply it as the efficient addition in manufacturing sintered Nd-Fe-B-based magnets. The alloy was prepared by arc melting in purified argon atmosphere, annealed at 600 °C for 90 h and subsequently subjected to hydrogenation. The phase composition and structure of the initial and hydrogenated alloy were studied by electron microscopy, electron microprobe and X-ray diffraction analyses. The in part substitution of copper for cobalt does not change the orthorhombic Fe3C-type structure (space group Pnma) of the Tb3Co compound. The copper solubility in the Tb3Co and Tb12Co7 compounds was determined and the lattice parameters of the compositions were estimated. During hydrogenation, the Tb3Co0.6Cu0.4 composition was shown to decompose into TbH2-3 hydride and fine dispersed (Co, Cu) mixture. Additions of the hydrogenated compound to Nd-Fe-B-based sintered magnets (the initial composition (wt.%) is Nd-24.0, Pr-6.5, Dy-0.5, B-1.0, Al-0.2, Fe-balance was prepared by strip-casting technique and subjected to hydrogen decrepitation) allow us to manufacture magnets with Br = 1.35 T and jHc = 1336 kA/m.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
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)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
METAL 2017: conference proceedings : 26th International Conference on Metallurgy and Materials : (reviewed version) : May 24th-26th 2017, Hotel Voroněž I, Brno, Czech Republic, EU
ISBN
978-80-87294-79-6
ISSN
—
e-ISSN
neuvedeno
Number of pages
6
Pages from-to
1775-1780
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
May 24, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—