Wear Behavior of Plasma-Sprayed Carbon Nanotube-Reinforced Aluminum Oxide Coating in Marine and High-Temperature Environments

被引：0

作者：

Anup Kumar Keshri

Arvind Agarwal

机构：

[1] Florida International University,Plasma Forming Laboratory, Mechanical and Materials Engineering

[2] Florida International University,High Temperature Tribology Laboratory, Mechanical and Materials Engineering

[3] Vellore Institute of Technology,Manufacturing Division, School of Mechanical and Building Sciences

来源：

Journal of Thermal Spray Technology | 2011年 / 20卷

关键词：

carbon nanotube; friction and wear; nanocrystalline composites; nanopowders; nanostructured coatings; plasma spraying; wear mechanisms;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Wear behavior of plasma-sprayed carbon nanotube (CNT)-reinforced aluminum oxide (Al2O3) composite coatings are investigated at room temperature (298 K), elevated temperature (873 K), and in sea water. Lowest wear volume loss was observed in the sea water as compared to dry sliding at 298 and 873 K. Relative improvement in the wear resistance of Al2O3-8 wt.% CNT coating compared to Al2O3 was 72% at 298 K, 76% at 873 K, and 66% in sea water. The improvement in the wear resistance of Al2O3-CNT coatings is attributed to (i) larger area coverage by protective film on the wear surface at room temperature and in sea water, (ii) higher fracture toughness of Al2O3-CNT coatings due to CNT bridging between splats, and (iii) anti-friction effect of sea water. The average coefficient of friction (COF) was the lowest (0.55) in sea water and the highest (0.83) at 873 K for Al2O3-8 wt.% CNT coating.

引用

页码：1217 / 1230

页数：13

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