NDLI: Rare-Earth Fe-B powder coating for improvements in corrosion resistance, flux aging loss, and mechanical strength of bonded magnets

Content Provider	IEEE Xplore Digital Library
Author	Guschl, P.C. Campbell, P.
Copyright Year	1965
Abstract	Coating formulations have been investigated for rare-earth Fe-B (RE Fe-B) type melt spun magnetic powders, to provide them with enhanced corrosion and oxidation resistance when exposed to aggressive environments. The coating formulations consist of an epoxy binder-based system and specialty additives. Results with two RE Fe-B powder types using these new formulations show between 19/spl deg/C and 26/spl deg/C enhancements in their operating temperatures for comparable flux aging loss, but now with better magnetic property retention at high temperatures and better adhesion between powder and organic coating. Optimal flux aging loss was found to result after curing the compacts within 180/spl deg/C to 200/spl deg/C for 30 to 60 min at a compaction pressure of 690 MPa (7 tons cm/sup -2/), although higher pressures resulted in more severe magnetic losses but higher bending strengths. The new formulations yield magnets whose magnetic properties are less affected by curing at these typical high temperatures.
Sponsorship	IEEE Magnetics Society
Starting Page	3859
Ending Page	3861
Page Count	3
File Size	105036
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Powders Coatings Corrosion Aging Bonding Magnets Temperature Magnetic flux Magnetic properties Curing rare-earth Fe–B magnets Organic additives oxidation resistance powder coatings
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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