Effect of Temperature on Structure of Outer Fe Oxide Layer of Fe-2.2Si Alloy

Xiao Jiang Liu; Guang Ming Cao; Yong Quan He; Tao Jia; Zhen Yu Liu

doi:10.4028/www.scientific.net/AMR.652-654.1009

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Effect of Temperature on Structure of Outer Fe...

Effect of Temperature on Structure of Outer Fe Oxide Layer of Fe-2.2Si Alloy

Abstract:

Red scale is the main surface defect of hot-rolled silicon steel plate due to the formation of fayalite. Studies have been done on high temperature oxidation of Fe-Si alloy, but effect of temperature on structure of outer Fe oxide layer is not fully discussed. Thermogravimetric analyzer (TGA) was used to simulate isothermal 60-min oxidation process of Fe-2.2Si alloy under air condition at 700°C-1200°C. Cross-sectional scale morphology and elemental distribution of the oxide layer were investigated by electron probe microanalysis (EPMA). It is found that in order to observe internal oxide precipitates clearly it is helpful that the sample is etched with nitric acid solution in alcohol firstly and then etched with hydrochloric acid solution in alcohol. At 700°C-1150°C outer Fe oxide layer is mostly composed of Fe2O3 and at 1200°C it consists of FeO + Fe3O4 + Fe2O3 + mixture of FeO/Fe2SiO4.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

1009-1015

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1009

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Online since:

January 2013

Authors:

Xiao Jiang Liu, Guang Ming Cao, Yong Quan He, Tao Jia, Zhen Yu Liu

Keywords:

EPMA, Fe-2.2Si Alloy, Fe₂SiO₄, Outer Fe Oxide Layer

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