Permanent magnet alloys based on Sm2Co17; phase evolution in the quinary system Sm-Zr-Fe-Co-Cu

In the five-component permanent magnets based on Sm2Co17 the formation of the familiar microstructural features (2:17 cell, 1:5 cell wall, and 1:3 lamellae) are elucidated with the help of recent and past information on the phase equilibria and crystal structures. Contrary to Zr-free alloys, in whic...

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Bibliographic Details
Published in:	Zeitschrift für Metallkunde Vol. 96; no. 1; pp. 17 - 23
Main Authors:	STADELMAIER, H. H, GOLL, D, KRONMüLLER, H
Format:	Journal Article
Language:	English
Published:	München Hanser 2005
Subjects:	Applied sciences Exact sciences and technology Metals. Metallurgy Permanent magnet Rare earth metal alloy
Online Access:	Get full text
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Summary:	In the five-component permanent magnets based on Sm2Co17 the formation of the familiar microstructural features (2:17 cell, 1:5 cell wall, and 1:3 lamellae) are elucidated with the help of recent and past information on the phase equilibria and crystal structures. Contrary to Zr-free alloys, in which the 1:5 cell-wall phase can form directly, the quinary alloys, to attain peak magnetic coercivity, undergo a transformation within the cell walls from undesirable 2:7 + 5:19 to high-anisotropy 1:5. A dramatic increase in the Cu content of the cell wall accompanies this transformation.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0044-3093
DOI:	10.3139/146.018078