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

被引：110

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

页码：5984 / 5994

页数：11

共 37 条

[1] Tribological properties of hot-pressed alumina-CNT composites [J].