Process map for plasma sprayed aluminum oxide-carbon nanotube nanocomposite coatings

被引：53

作者：

Balani, K. ^{[1
]}

Agarwal, A. ^{[1
]}

机构：

[1] Florida Int Univ, Dept Mech & Mat Engn, Miami, FL 33174 USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 17期

关键词：

plasma spraying; aluminum oxide; scanning electron microscopy (SEM); in-flight powder diagnosis; process-map generation;

D O I：

10.1016/j.surfcoat.2008.03.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Process map has been developed for plasma sprayed aluminum oxide (Al2O3) ceramic nanocomposite coatings with carbon nanotube (CNT) reinforcement in varying content and spatial distribution. The process map was constructed using the temperature and velocity data of the in-flight powder particles exiting from the plasma plume. Process map elucidates the interdependence of powder feedstock pre-treatment, CNT content and dispersion behavior on the in-flight particle thermal history and subsequently evolving microstructure and coating properties. High thermal conductivity of CNTs alters the heat transfer characteristic during the splat formation. Microstructure of the coatings consists of fully melted zone (FM), partially melted or solid-state sintered zone (PM) and porosity. Process map provides a processing control tool for plasma spraying of Al2O3-CNT nanocomposite coatings. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：4270 / 4277

页数：8

共 26 条

[1]

Net shape nanostructured aluminum oxide structures fabricated by plasma spray forming [J].