Multiscale wear of plasma-sprayed carbon-nanotube-reinforced aluminum oxide nanocomposite coating

被引：109
作者：
Balani, Kantesh [1 ]
Harimkar, Sandip P. [2 ]
Keshri, Anup [1 ]
Chen, Yao [1 ]
Dahotre, Narendra B. [2 ]
Agarwal, Arvind [1 ]
机构：
[1] Florida Int Univ, Miami, FL 33174 USA
[2] Univ Tennessee, Knoxville, TN 37996 USA
来源：
ACTA MATERIALIA | 2008年 / 56卷 / 20期
关键词：
Plasma spraying; Al2O3-carbon nanotube (CNT) nanocomposite; Nano-scratch test; Multiscale-wear tribology;
D O I：
10.1016/j.actamat.2008.08.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A multiple length scale wear study of plasma-sprayed Al2O3-carbon nanotube (CNT) nanocomposite coating is described. CNT content and dispersion have been shown to enhance the macro-weat resistance (pin-on-disk) by more than 49 times, and nano-wear (scratch) resistance up to 18 times. CNTs have been shown to reduce the wear of Al2O3 matrix by (i) increasing densification, (ii) CNT bridging and (iii) CNT lubrication. A strong dependence of wear volume loss on the microstructural features is described at different length scales, and the disparity of material loss observed in the macro- and nano-wear tests is explained. A wear model has been established to numerically quantify wear loss dependence in terms of bulk material properties and correlating these with wear parameters from nano-scratch testing. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5984 / 5994
页数：11
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