Self-assembling of atomic vacancies at an oxide/intermetallic alloy interface

Nature Materials
Vincent MauricePhilippe Marcus

Abstract

Oxide layers grown on the surface provide an effective way of protecting metallic materials against corrosion for sustainable use in a broad range of applications. However, the growth of cavities at the metal/oxide interface weakens the adherence of the protective layer and can promote its spallation under service conditions, as observed for alumina layers formed by selective oxidation of aluminide intermetallic alloys used in high-temperature applications. Here we show that direct atomic-scale observations of the interface between an ultrathin protective oxide layer (alumina) grown on an intermetallic titanium aluminide substrate (TiAl) can be performed with techniques sensitive to the topmost atomic layers at the surface. Nanocavities resulting from the self-assembling of atomic vacancies injected at the interface by the growth mechanism of the protective oxide are observed for the first time, bringing new insight into the understanding of the fate of injected cavities in oxidation processes.

References

Feb 15, 2002·Nature·Mary P RyanDavid S McPhail
Apr 16, 2002·Science·Nitin P PadtureEric H Jordan

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Citations

Mar 1, 2012·ACS Applied Materials & Interfaces·Byoungseon JeonShriram Ramanathan
Dec 5, 2012·Chemical Reviews·Claudine Noguera, Jacek Goniakowski
Oct 7, 2004·Nature Materials·Mary Ryan
Apr 10, 2009·The Journal of Chemical Physics·Janina ZimmermannLucio Colombi Ciacchi
Aug 31, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Wolf-Dietrich ZabkaJürg Osterwalder
Feb 6, 2018·Scientific Reports·Chatdanai BoonruangPinit Kidkhunthod
Jun 16, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Lu WangAlexander Chroneos
Apr 30, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Jong Kyun MoonHyuk Kyu Pak
Aug 31, 2017·Scientific Reports·Chuandong WuEnrique J Lavernia
Jul 12, 2012·Physical Chemistry Chemical Physics : PCCP·Shi-Yu LiuSanwu Wang
Feb 9, 2012·Journal of Physics. Condensed Matter : an Institute of Physics Journal·G H SimonH-J Freund
Apr 6, 2011·Journal of the American Chemical Society·Jaehoon JungMaki Kawai

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