Improved corrosion and temperature behaviour of modified Nd-Fe-B magnets
The characteristics of the high energy product NdFeB magnets obtained by the powder metallurgy route have been improved by appropriate vanadium additions. Specific combinations of V and Co lead to an intrinsic coercive force of about 1350 kA/m (17 kOe) in Dy-free magnets, without any large decrease...
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Published in | IEEE transactions on magnetics Vol. 26; no. 5; pp. 1930 - 1932 |
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Main Authors | , , |
Format | Journal Article Conference Proceeding |
Language | English |
Published |
New York, NY
IEEE
01.09.1990
Institute of Electrical and Electronics Engineers |
Subjects | |
Online Access | Get full text |
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Summary: | The characteristics of the high energy product NdFeB magnets obtained by the powder metallurgy route have been improved by appropriate vanadium additions. Specific combinations of V and Co lead to an intrinsic coercive force of about 1350 kA/m (17 kOe) in Dy-free magnets, without any large decrease of remanence. If 1.5-at.% Dy is added, load line down to -B/ mu H=0.5 can be achieved at 180 degrees C without irreversible losses. Corrosion resistance is improved by blocking the selective oxidation of the Nd-rich phase. As a consequence, organic-coated magnets are able to withstand 15 days at 115 degrees C-1.75 bars in a H/sub 2/O saturated atmosphere without any degradation. It is concluded that this set of new properties will enlarge the application fields of Nd-F-B permanent magnets.< > |
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Bibliography: | SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 |
ISSN: | 0018-9464 1941-0069 |
DOI: | 10.1109/20.104574 |