Title
Intermediate temperature tribological behavior of carbon nanotube reinforced plasma sprayed aluminum oxide coating
Abbreviated Journal Title
Surf. Coat. Technol.
Keywords
High temperature wear; Carbon nanotubes; Aluminum oxide; Plasma spray; Tribochemical reaction; Coefficient of friction; OXIDATION RESISTANCE; CNT COMPOSITES; CERAMICS; CARBIDE; POLYMER; Materials Science, Coatings & Films; Physics, Applied
Abstract
Tribological behavior of plasma sprayed carbon nanotube (CNT) reinforced aluminum oxide (Al(2)O(3)) composite coatings was examined at room temperature, 573 K and 873 K using tungsten carbide (WC) ball-on-disk tribometer. The weight loss due to wear of Al(2)O(3) coating was found to be increasing with the temperature while Al(2)O(3)-CNT coating showed a decreasing trend in the weight loss with the temperature. Relative improvement in the wear resistance of Al(2)O(3)-CNT coating compared to Al(2)O(3) coating was found to be 12% at room temperature which gradually increased to similar to 56% at 573 K and similar to 82% at 873 K. Protective layer as a result of tribo-chemical reaction was observed on the wear track of both of the coatings. The improvement in the wear resistance of Al(2)O(3)-CNT coating was attributed to three phenomena viz. (i) higher hardness at the elevated temperature as compared to Al(2)O(3) coating, (ii) larger area coverage by protective film on the wear surface at the elevated temperature and (iii) CNT bridging between splats. The coefficient of friction (COF) of Al(2)O(3) coating was nearly constant at room and elevated temperature whereas COF for Al(2)O(3)-CNT coating decreased at the elevated temperature (873 K). (C) 2009 Elsevier B.V. All rights reserved.
Journal Title
Surface & Coatings Technology
Volume
204
Issue/Number
11
Publication Date
1-1-2010
Document Type
Article
Language
English
First Page
1847
Last Page
1855
WOS Identifier
ISSN
0257-8972
Recommended Citation
"Intermediate temperature tribological behavior of carbon nanotube reinforced plasma sprayed aluminum oxide coating" (2010). Faculty Bibliography 2010s. 350.
https://stars.library.ucf.edu/facultybib2010/350
Comments
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