Wear resistance of Al2O3–CNT ceramic nanocomposites at room and high temperatures

Puchy, Viktor, Hvizdos, Pavol, Dusza, Ján, Kovac, Frantisek, Inam, Fawad and Reece, Michael (2013) Wear resistance of Al2O3–CNT ceramic nanocomposites at room and high temperatures. Ceramics International, 39 (5). pp. 5821-5826. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2012.12.100

Abstract

This work describes the microstructure, indentation toughness, room and high temperature tribological properties of alumina–carbon nanotubes nanocomposites with various contents of carbon nanotubes prepared by spark plasma sintering. Materials have been studied by SEM, TEM, Vickers indentation technique on the microhardness and nanohardness testers and, by high temperature ball-on-disk tribometer. The microstructure, CNT dispersion, and fracture surface were studied and wearing mechanisms: fiber pull-out, CNT crushing and formation of transferred film were identified. The addition of 5% CNTs increased the indentation toughness from 3.24 MPa m1/2 to 4.14 MPa m1/2. The coefficient of friction of alumina–CNT nanocomposites is approximately three times lower in comparison to the alumina monolithic material due to the lubricating effect of carbon nanotubes during sliding.

Item Type: Article
Uncontrolled Keywords: Wear resistance, alumina–CNT nanocomposites
Subjects: F200 Materials Science
H300 Mechanical Engineering
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 13 Jun 2013 15:18
Last Modified: 10 Aug 2015 11:11
URI: http://nrl.northumbria.ac.uk/id/eprint/12890

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