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

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

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Date

2015

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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.

Citation

Liu , L L , Guo , Q Q , Liu , S , Ni , C S & Niu , Y 2015 , ' Anomalous oxidation of Fe-Si alloys under a low oxygen pressure at 800 °C ' , Corrosion Science , vol. In press . https://doi.org/10.1016/j.corsci.2015.05.055

Publication

Corrosion Science

Status

Peer reviewed

DOI

https://doi.org/10.1016/j.corsci.2015.05.055

ISSN

0010-938X

Type

Journal article

Rights

Description

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

Collections

University of St Andrews Research

URI

http://hdl.handle.net/10023/8934