NDLI: Comparison of the corrosion behavior of die-upset and sintered NdFeB magnets

Content Provider	IEEE Xplore Digital Library
Author	Ma, B.M. Lee, D. Smith, B. Gaiffi, S. Owens, B. Bie, H. Warren, G.W.
Copyright Year	1965
Abstract	Corrosion rates for sintered NdFeB magnets are compared with NdFeB magnets prepared from melt spun material (hot pressed and die upset). Corrosion rates were determined by standard electrochemical methods in 0.9 M Na/sub 2/SO/sub 4/, at pH 2.4 and 4.4. Autoclave tests correlated quite well with corrosion rates measured electrochemically in the more aggressive pH electrolyte. The more aggressive pH 2.4 electrolyte is more representative of the conditions occurring in the autoclave tests. The hot pressed and die upset magnets exhibit significantly lower corrosion rates than sintered magnets. The reduction in corrosion rate is probably due to smaller grain size and diminished amounts of Nd-rich material.
Sponsorship	IEEE Magnetics Society
Starting Page	2477
Ending Page	2479
Page Count	3
File Size	56965
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Corrosion Magnets Magnetic materials Grain boundaries Neodymium Iron Grain size Pressing Composite materials Materials testing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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