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Local electrical properties of thermally grown oxide films formed on duplex stainless steel surfaces

Guo, Liqiu; Yang, Binjie; He, Jianying; qiao, lijie
Journal article
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URI
http://hdl.handle.net/11250/2586430
Date
2018
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  • Institutt for konstruksjonsteknikk [1599]
  • Publikasjoner fra CRIStin - NTNU [21000]
Original version
Applied Surface Science. 2018, 444 48-55.   10.1016/j.apsusc.2018.03.047
Abstract
The local electrical properties of thermally grown oxide films formed on ferrite and austenite surfaces of duplex stainless steel at different temperatures were investigated by Current sensing atomic force microscopy, X-ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES). The current maps and XPS/AES analyses show that the oxide films covering austenite and ferrite surfaces formed at different temperatures exhibit different local electrical characteristics, thickness and composition. The dependence of electrical conductivity of oxide films covering austenite and ferrite surface on the formation temperature is attributed to the film thickness and semiconducting structures, which is intrinsically related to thermodynamics and kinetics process of film grown at different temperature. This is well elucidated by corresponding semiconductor band structures of oxide films formed on austenite and ferrite phases at different temperature.
Publisher
Elsevier
Journal
Applied Surface Science

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