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Oxidation Behavior of a Sputtered Ni–5Cr–5Al Nanocrystalline Coating

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Abstract

A NiO-forming Ni–5Cr–5Al (at.%) alloy has been developed anddeposited as a sputtered nanocrystalline coating. The oxide formation andoxidation behavior of this coating have been studied at 1000°C inair. The oxidation rate markedly decreased with time and the oxidationkinetics obeyed the fourth power law. Complex oxide scales, consisting ofNiO, NiAl2O4 and α-Al2O3,were formed during 200 hr oxidation. The outer oxide layer consisted of NiOand NiAl2O4 and an inner oxide layer ofα-Al2O3. The sputtered Ni–5Cr–5Alnanocrystalline coating showed good oxidation resistance due to theformation of an α-Al2O3 inner layer andexcellent adhesion of the complex oxide scales.

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Authors and Affiliations

  1. State Key Laboratory for Corrosion and Protection, Institute of Corrosion and Protection of Metals, The Chinese Academy of Sciences, Shenyang, 110015, P. R. China

    Guofeng Chen & Hanyi Lou

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  1. Guofeng Chen
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  2. Hanyi Lou
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Chen, G., Lou, H. Oxidation Behavior of a Sputtered Ni–5Cr–5Al Nanocrystalline Coating. Oxidation of Metals 53, 467–479 (2000). https://doi.org/10.1023/A:1004628925414

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