An investigation into the corrosion behaviour of Zn coated NdFeB powder

Author

Lillywhite, S.J. ; Walton, A. ; Williams, A.J. ; Harris, I.R. ; Kinsey, D.J. ; Jewell, G.W. ; Howe, D.

Author_Institution

Sch. of Metall. & Mater. Sci., Univ. of Birmingham, UK

fYear

2002

Abstract

Summary form only given. NdFeB magnets are well known for their favourable magnetic properties but find limited applications under harsh environmental conditions due to poor corrosion resistance. The work presented here forms part of a broader project to, (1) develop anisotropic polymer bonded NdFeB magnets with improved corrosion resistance, and (2) design a water pump for use in automotive applications. Prior to pressing and curing to form the magnets, the anisotropic powder is coated with a layer of zinc by the Low Pressure Pack Sublimation (LPPS) process. This paper reports on a preliminary investigation into the corrosion resistance properties of the unbonded powder, as it is expected that the properties of the powder will be, to a large extent, indicative of the corrosion resistance properties of the pressed magnet.

Keywords

boron alloys; corrosion protective coatings; ferromagnetic materials; iron alloys; magnetic particles; neodymium alloys; permanent magnets; sublimation; zinc; NdFeB; NdFeB magnets; NdFeB-Zn; SEM; Zn coated NdFeB powder; anisotropic powder; corrosion behaviour; corrosion resistance; curing; harsh environmental conditions; low pressure pack sublimation process; pressed magnet; pressing; unbonded powder; zinc; Anisotropic magnetoresistance; Automotive applications; Bonding; Corrosion; Magnetic properties; Magnets; Polymers; Powders; Pressing; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1000832

Filename

1000832