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Journal of Nanotechnology
Volume 2012, Article ID 940516, 5 pages
http://dx.doi.org/10.1155/2012/940516
Research Article

Exfoliated Graphite Reinforced PMMA Composite: A Study on Nanoindentation and Scratch Behavior

1School of Materials Science and Engineering, Bengal Engineering and Science University, Shibpur, Howrah 711103, India
2Centre of Excellence for Green Energy and Sensor Systems, Bengal Engineering and Science University, Shibpur, Howrah 711103, India
3Department of Metallurgy and Materials Engineering, Bengal Engineering and Science University, Shibpur, Howrah 711103, India

Received 5 April 2012; Accepted 10 May 2012

Academic Editor: Huisheng Peng

Copyright © 2012 Himel Chakraborty et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The present work aims to compare the scratch hardness (Hs) with the indentation hardness (HIT) obtained from nanoindentation measurements of exfoliated graphite/poly (methyl methacrylate) (EG/PMMA) composites. EG/PMMA composites with thickness 50 μm each were produced by in situ melt mixing method. Scratch hardness was measured from the scratch width formed at low applied load during the course of the scratch measurements. The measured scratch hardness values were compared with the indentation hardness. There is a good correlation between the scratch hardness and the indentation hardness at low indentation depths, with a linear relationship between hardness and the reinforcement content of exfoliated graphite.