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Title: Oxidation behavior of a sputtered Ni-5Cr-5Al nanocrystalline coating

Abstract

A NiO-forming Ni-5Cr-5Al (at.%) alloy has been developed and deposited as a sputtered nanocrystalline coating. The oxide formation and oxidation behavior of this coating have been studied at 1,000 C in air. The oxidation rate markedly decreased with time and the oxidation kinetics obeyed the fourth power law. Complex oxide scales, consisting of NiO, NiAl{sub 2}O{sub 4} and {alpha}-Al{sub 2}O{sub 3}, were formed during 200 hr oxidation. The outer oxide layer consisted of NiO and NiAl{sub 2}O{sub 4} and an inner oxide layer of {alpha}-Al{sub 2}O{sub 3}. The sputtered Ni-5Cr-5Al nanocrystalline coating showed good oxidation resistance due to the formation of an {alpha}-Al{sub 2}O{sub 3} inner layer and excellent adhesion of the complex oxide scales.

Authors:
;
Publication Date:
Research Org.:
Chinese Academy of Sciences, Inst. of Corrosion and Protection of Metals, Shenyang (CN)
OSTI Identifier:
20050528
Resource Type:
Journal Article
Journal Name:
Oxidation of Metals
Additional Journal Information:
Journal Volume: 53; Journal Issue: 5-6; Other Information: PBD: Jun 2000; Journal ID: ISSN 0030-770X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; OXIDATION; NICKEL ALLOYS; CHROMIUM ALLOYS; ALUMINIUM ALLOYS; PROTECTIVE COATINGS; SPUTTERING; TEMPERATURE RANGE 1000-4000 K; SCALING; KINETICS

Citation Formats

Chen, G., and Lou, H. Oxidation behavior of a sputtered Ni-5Cr-5Al nanocrystalline coating. United States: N. p., 2000. Web. doi:10.1023/A:1004628925414.
Chen, G., & Lou, H. Oxidation behavior of a sputtered Ni-5Cr-5Al nanocrystalline coating. United States. doi:10.1023/A:1004628925414.
Chen, G., and Lou, H. Thu . "Oxidation behavior of a sputtered Ni-5Cr-5Al nanocrystalline coating". United States. doi:10.1023/A:1004628925414.
@article{osti_20050528,
title = {Oxidation behavior of a sputtered Ni-5Cr-5Al nanocrystalline coating},
author = {Chen, G. and Lou, H.},
abstractNote = {A NiO-forming Ni-5Cr-5Al (at.%) alloy has been developed and deposited as a sputtered nanocrystalline coating. The oxide formation and oxidation behavior of this coating have been studied at 1,000 C in air. The oxidation rate markedly decreased with time and the oxidation kinetics obeyed the fourth power law. Complex oxide scales, consisting of NiO, NiAl{sub 2}O{sub 4} and {alpha}-Al{sub 2}O{sub 3}, were formed during 200 hr oxidation. The outer oxide layer consisted of NiO and NiAl{sub 2}O{sub 4} and an inner oxide layer of {alpha}-Al{sub 2}O{sub 3}. The sputtered Ni-5Cr-5Al nanocrystalline coating showed good oxidation resistance due to the formation of an {alpha}-Al{sub 2}O{sub 3} inner layer and excellent adhesion of the complex oxide scales.},
doi = {10.1023/A:1004628925414},
journal = {Oxidation of Metals},
issn = {0030-770X},
number = 5-6,
volume = 53,
place = {United States},
year = {2000},
month = {6}
}