Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C

L.L. Liu; Q.Q. Guo; S. Liu; C.S. Ni; Y. Niu

doi:10.1016/j.corsci.2015.05.055

Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C

L.L. Liu, Q.Q. Guo, S. Liu, C.S. Ni, Y. Niu

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract The oxidation of three Fe-xSi alloys (x = 5, 9, 13 at.%) under 10⁻²⁰ atm O₂ at 800 °C formed in all cases SiO₂ layers. For Fe-5Si this layer broke down and healed up periodically forming an anomalous internal oxidation zone with spherical and net-shaped SiO₂ particles. The SiO₂layer formed on the other two alloys spalled off due to the growth and thermal stress accumulated. The critical silicon content needed for its external oxidation on Fe-Si alloys calculated according to an extension of Wagner's theory under the present experimental conditions is significantly smaller than the experimental results.

Original language	English
Journal	Corrosion Science
Volume	In press
Early online date	4 Jun 2015
DOIs	https://doi.org/10.1016/j.corsci.2015.05.055
Publication status	Published - 2015

Keywords

A. Iron
B. SEM
C. Internal oxidation
C. Amorphous structures

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@article{c5acfca4606b4333b705a48c6f61561f,

title = "Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C",

abstract = "Abstract The oxidation of three Fe-xSi alloys (x = 5, 9, 13 at.%) under 10−20 atm O2 at 800 °C formed in all cases SiO2 layers. For Fe-5Si this layer broke down and healed up periodically forming an anomalous internal oxidation zone with spherical and net-shaped SiO2 particles. The SiO2 layer formed on the other two alloys spalled off due to the growth and thermal stress accumulated. The critical silicon content needed for its external oxidation on Fe-Si alloys calculated according to an extension of Wagner's theory under the present experimental conditions is significantly smaller than the experimental results.",

keywords = "A. Iron, B. SEM, C. Internal oxidation, C. Amorphous structures",

author = "L.L. Liu and Q.Q. Guo and S. Liu and C.S. Ni and Y. Niu",

note = "The authors acknowledge financial support by NSFC of China under the research projects (Nos. 50971129 and 51371183). ",

year = "2015",

doi = "10.1016/j.corsci.2015.05.055",

language = "English",

volume = "In press",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C

AU - Liu, L.L.

AU - Guo, Q.Q.

AU - Liu, S.

AU - Ni, C.S.

AU - Niu, Y.

N1 - The authors acknowledge financial support by NSFC of China under the research projects (Nos. 50971129 and 51371183).

PY - 2015

Y1 - 2015

N2 - Abstract The oxidation of three Fe-xSi alloys (x = 5, 9, 13 at.%) under 10−20 atm O2 at 800 °C formed in all cases SiO2 layers. For Fe-5Si this layer broke down and healed up periodically forming an anomalous internal oxidation zone with spherical and net-shaped SiO2 particles. The SiO2 layer formed on the other two alloys spalled off due to the growth and thermal stress accumulated. The critical silicon content needed for its external oxidation on Fe-Si alloys calculated according to an extension of Wagner's theory under the present experimental conditions is significantly smaller than the experimental results.

AB - Abstract The oxidation of three Fe-xSi alloys (x = 5, 9, 13 at.%) under 10−20 atm O2 at 800 °C formed in all cases SiO2 layers. For Fe-5Si this layer broke down and healed up periodically forming an anomalous internal oxidation zone with spherical and net-shaped SiO2 particles. The SiO2 layer formed on the other two alloys spalled off due to the growth and thermal stress accumulated. The critical silicon content needed for its external oxidation on Fe-Si alloys calculated according to an extension of Wagner's theory under the present experimental conditions is significantly smaller than the experimental results.

KW - A. Iron

KW - B. SEM

KW - C. Internal oxidation

KW - C. Amorphous structures

U2 - 10.1016/j.corsci.2015.05.055

DO - 10.1016/j.corsci.2015.05.055

M3 - Article

SN - 0010-938X

VL - In press

JO - Corrosion Science

JF - Corrosion Science

ER -

Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C

Abstract

Keywords

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