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Study on Young's modulus and microhardness of carbon nanotubes reinforced copper nanocomposite

Patil, RG and Chatpalli, V and Kannan, KR (2010) Study on Young's modulus and microhardness of carbon nanotubes reinforced copper nanocomposite. In: Materials Science and Technology, 26 (4). pp. 478-481.

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Abstract

Carbon nanotubes (CNTs) were discovered by Iijima in 1991 as the fourth form of carbon. Carbon nanotubes are the ultimate form of the carbon fibre because of its high Young's modulus in the order of 1 TPa, which is very useful for load transfer in nanocomposites. In the present work, CNT/Cu nanocomposites were fabricated by the powder metallurgy technique, and after extrusion of the nanocomposites, bright field transmission electron microscopic studies were carried out. From the transmission electron microscopic images obtained, a novel method of ascertaining the Young's modulus of multiwalled CNTs is worked out in the present paper, which turns out to be 0.94 TPa, which is consistent with experimental results. Furthermore, an attempt is made to investigate the microhardness of copper by reinforcing it with multiwalled CNTs. There is an increase in hardness by twofold in CNT/Cu nanocomposites as compared to pure Cu matrix. This is due to high relative density, even distribution of CNTs and proper bonding at CNT/Cu interfaces.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Institute of Materials, Minerals and Mining.
Keywords: Multiwalled carbon nanotubes;CNT/Cu nanocomposites; Microhardness;Young's modulus;TEM
Department/Centre: Others
Date Deposited: 09 Jun 2010 05:12
Last Modified: 09 Jun 2010 05:12
URI: http://eprints.iisc.ernet.in/id/eprint/27247

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