Improved processing of carbon nanotube/magnesium alloy composites

Li Q, Viereckl A, Rottmair CA, Singer R (2009)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2009

Journal

Book Volume: 69

Pages Range: 1193-1199

DOI: 10.1016/j.compscitech.2009.02.020

Abstract

Carbon nanotubes (CNTs) are promising reinforcements for light weight and high strength composites due to their exceptional properties. However, until now, the main obstacle is to obtain a homogenous dispersion of the CNTs in the desired material matrix. Quite a few methods have been studied to help improving the dispersion of CNTs in a polymer matrix. But not much research has been conducted on how to disperse CNTs in metal matrices. In this study, a two-step process was applied. In the first stage, a block copolymer was used as a dispersion agent to pre-disperse multiwall carbon nanotubes (MWNTs) on Mg alloy chips. Then the chips with the well dispersed MWNTs on their surface were melted and at the same time vigorously stirred. The molten MWNT Mg alloy composites were poured into a cylindrical mould to solidify quickly. For the pre-dispersion step, the microstructures of the Mg alloy chips were studied under SEM. MWNTs were quite successfully dispersed on the surfaces of the Mg alloy chips. The mechanical properties of the MWNT/Mg composites were measured by compression testing. The compression at failure, the compressive yield strength and ultimate compressive strength have all been improved significantly up to 36% by only adding 0.1 wt% MWNTs to the Mg alloy. In order to predict the potential yield strengths of the MWNT reinforced Mg alloy composites, the contributions by load transfer, Orowan strengthening and thermal mismatch were added up. © 2009 Elsevier Ltd. All rights reserved.

Authors with CRIS profile

How to cite

APA:

Li, Q., Viereckl, A., Rottmair, C.A., & Singer, R. (2009). Improved processing of carbon nanotube/magnesium alloy composites. Composites Science and Technology, 69, 1193-1199. https://dx.doi.org/10.1016/j.compscitech.2009.02.020

MLA:

Li, Qianqian, et al. "Improved processing of carbon nanotube/magnesium alloy composites." Composites Science and Technology 69 (2009): 1193-1199.

BibTeX: Download