Forsterite film formation and grain growth in 3% Si steel

Author

Cunha, Marco A. ; Cesar, G.M.M.

Author_Institution

Cia Acos Especiais Itabira, Timoteo, Brazil

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4890

Lastpage

4892

Abstract

The forsterite film in 3% Si steel is formed by a solid state reaction of the annealing separator, MgO, with SiO₂ that results from the reduction of the fayalite layer in the hydrogen atmosphere in the high temperature anneal. In this work, secondary recrystallization was about complete at 1000°C. After that temperature tertiary recrystallization can occur if the boundary drag of the second phase particles can be overcome. Addition of phosphates to the annealing separator affects the morphology of the forsterite film and can have an important effect on tertiary recrystallization by affecting the rate of decrease of the boundary-drag and/or the surface energy relationship

Keywords

annealing; ferromagnetic materials; grain growth; iron alloys; magnesium compounds; recrystallisation; silicon alloys; surface energy; 1000 degC; Fe-Si; Fe-Si steel; H₂ atmosphere; Mg₂SiO₄; MgO; SiO₂; annealing separator; boundary drag; fayalite layer; forsterite film formation; grain growth; high temperature anneal; morphology; phosphates; second phase particles; secondary recrystallization; solid state reaction; surface energy; tertiary recrystallization; Annealing; Atmosphere; Optical films; Optical microscopy; Particle separators; Scanning electron microscopy; Semiconductor films; Steel; Strips; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334256

Filename

334256