Title :
Surface Oxidation and Magnetic Properties of Fe-Si-B-Nb Amorphous Alloy
Author :
Kang, Eun Young ; Chung, Young Hoon
Author_Institution :
Korea Inst. of Sci. & Technol., Seoul
fDate :
6/1/2009 12:00:00 AM
Abstract :
In the present work, the forming mechanism of oxide layer during wet oxidations is presented. There can be three kinds of stress sources that develop cracks in the oxide layer during oxidation. One is the volume change by oxidation, another is thermal expansion by the heat of oxidation, and the third is the gas pressure evolved. In this investigation, the surface oxidation mechanism of Fe-Si-B-Nb amorphous powder during wet oxidation treatment is studied by the analysis of the composition and magnetic domains of the oxide layer. Fe-Si-B-Nb amorphous powder used in this research is 53-75 mum in diameter; and the morphology of oxide layers can be controlled by changing oxidation treatment time. The phase and morphology of composing insulating layer of consecutive oxide layers is characterized by SEM, XPS, EDS, TEM and Lorentz TEM.
Keywords :
X-ray photoelectron spectra; amorphous magnetic materials; boron alloys; cracks; iron alloys; magnetic domains; niobium alloys; oxidation; scanning electron microscopy; silicon alloys; soft magnetic materials; thermal expansion; transmission electron microscopy; EDS; FeSiBNb; Lorentz TEM; SEM; TEM; XPS; cracks; gas pressure; insulating layer; magnetic domains; magnetic properties; oxide layer formation; size 53 mum to 75 mum; soft amorphous powder alloy; stress sources; surface oxidation mechanism; thermal expansion; Analysis of oxide layer; Fe-Si-B-Nb amorphous alloy; soft magnetic amorphous alloy; wet oxidation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2018906
