Interfacial segregation kinetics of sulfur and magnetic induction influenced by hydrogen flow rate in thin-gauged 3% Si-Fe strip

Author

Kim, S.B. ; Choi, Y.S. ; Cho, S.S. ; Chai, K.H. ; Heo, N.H.

Author_Institution

Korea Electr. Power Res. Inst., Taejon, South Korea

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

3192

Lastpage

3194

Abstract

Effects of flow rate of hydrogen and final reduction on final texture and magnetic induction have been investigated in 3% Si-Fe alloy strips containing 90-ppm sulfur. After final annealing under a flowing hydrogen atmosphere of 10 l/min, the strip showed a magnetic induction value (B₁₀) higher than 1.9 T, whereas only about 1.6 T was obtained at a flow rate of 3 l/min. Within the range of final reduction in thickness of 30%-60%, the final texture and the magnetic induction revealed little dependence on final reduction. Auger electron spectroscopy indicated that the strong dependence of magnetic induction on the flow rate of hydrogen was due to the difference in segregation kinetics of sulfur at the strip surface. The selective growth kinetics also supported a correlation between segregation kinetics of sulfur, texture development, and magnetic induction.

Keywords

Auger electron spectra; annealing; ferromagnetic materials; iron alloys; silicon alloys; sulphur; surface segregation; texture; Auger electron spectroscopy; H₂; Si-Fe:S; annealing; hydrogen flow rate; interfacial sulfur segregation kinetics; magnetic induction; selective growth kinetics; texture; thin-gauged Si-Fe alloy strip; Annealing; Atmosphere; Electrons; Hydrogen; Kinetic theory; Magnetic field measurement; Silicon; Spectroscopy; Strips; Surface cleaning;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802411

Filename

1042494