Please use this identifier to cite or link to this item: doi:10.22028/D291-27817
Title: Influence of the Reinforcement Distribution and Interface on the Electronic Transport Properties of MWCNT-Reinforced Metal Matrix Composites 
Authors: Suarez, Sebastián
Souza, Nicolás
Lasserre, Federico
Mücklich, Frank
Language: English
Title: Advanced Engineering Materials
Volume: 18
Book: 9
Pages: 1626-1633
Issue Date: 2016
Free key words: multi wall carbon nanotube
metal matrix composite
electronic transport properties
DDC groups: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: The transition towards an electricity-driven world is testing electrical contact materials to their limits. Specifically, new alternatives are needed where composites that sacrificed conductivity in exchange for reduced weldability and higher heat dissipation sufficed. Carbon nanotubes (CNT) have the potential to close the gap as ideal fillers due to their outstanding intrinsic properties, pushing the application limits further. However, the reported electrical conductivity measurements showed no clear tendency. In the present study we attempt to shed some light on this matter by focusing on the causes behind those results. We observed that the addition of 1 wt. % CNT improves the conductivity of nickel, followed by a drop for higher concentrations, measured by 4-point probe testing. Six nanotube orientation models describing different CNT arrangements were contrasted to the experimental data. Corrected values for nickel and CNT resistivities effectively place that of the composites close to the models, providing indications of a preferential orientation. We conclude that, in contrast to what is widely reported, the main contributing factors to the resistivity are inter-tube coupling, porosity and interfacial scattering, whereas clustering marginally influences the behaviour.
DOI of the first publication: 10.1002/adem.201600216
URI: urn:nbn:de:bsz:291--ds-278177
ISSN: 1527-2648
Date issued: 19-Mar-2019
Sponsorship ID: EU-RISE Project CREATe-Network GA 644013
EU-Projectnumber: info:eu-repo/grantAgreement/EC/H2020/644013/EU//createE-Network
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Institute: NT - Materialwissenschaft und Werkstofftechnik
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