Effect of forsterite coatings on the domain structure of grain-oriented 3-percent Si-Fe

Author

Morris, William G. ; Shilling, Jack W. ; Fecich, Dennis R. ; Rao, Prakash

Author_Institution

General Electric Corporate Research and Development, Schenectady, NY.

Volume

14

Issue

1

fYear

1978

fDate

1/1/1978 12:00:00 AM

Firstpage

14

Lastpage

17

Abstract

Domain structures were observed in polycrystalline, high permeability grain oriented 3-percent Si-Fe before and after formation of a forsterite coating. A 200 kV scanning electron microscope was used for domain observations. Significant alterations in the supplementary (flux closure) domain structure and a substantial refinement in the 180° domain wall spacing were produced by the forsterite coaling. Increased pinning of 180° walls by inclusions was observed after fotsterite coating. These inclusions are most likely parlicles of forsterite lying just below the sheet surface. The effects of forsterite coatings on domain structure are believed to be caused by changes in surface roughness occurring after forsterite coating. Possible effects of these variations in domain structure on losses are discussed.

Keywords

Magnetic domains; Steels; Annealing; Coatings; Coils; Magnetic domains; Power transformer insulation; Rough surfaces; Scanning electron microscopy; Steel; Surface roughness; Surface topography;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1978.1059718

Filename

1059718