Effect of carbon nanofibers content on thermal properties of ceramic nanocomposites

Borrell, A., Garcia Rocha, Victoria ORCID: https://orcid.org/0000-0001-6125-8556, Torrecillas, R. and Fernandez, A. 2012. Effect of carbon nanofibers content on thermal properties of ceramic nanocomposites. Journal of Composite Materials 46 (10) , pp. 1229-1234. 10.1177/0021998311416528

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Abstract

The thermal properties of carbon nanofibers (CNFs)-alumina and CNFs-zirconia nanocomposites densified by spark plasma sintering technique were evaluated. The influence of CNFs content and type of ceramic matrix on thermal conductivity of ceramic-CNFs materials, measured by the laser-flash method, was studied. The effect of CNFs depends noticeably on the ceramic component and thus, an increase of 83% and a decrease of 97% in thermal conductivity at room temperature is observed when 80 vol% of CNFs is added to ZrO2 and Al2O3, respectively. However, even if the thermal conductivity is lower, the efficiency of heat transfer to the environment in CNFs/Al2O3 nanocomposites is better than that corresponding to monolithic alumina. This behavior is due to CNFs arrangement in dense materials. Considering the low electrical resistivity for CNFs/ Al2O3 and CNFs/ ZrO2 materials (10−1–10−2 Ω·cm), these nanocomposites are promising candidates as thermoelectric materials that require low thermal conductivity, but high electrical conductivity.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	Sage Publications
ISSN:	0021-9983
Last Modified:	01 Nov 2022 10:57
URI:	https://orca.cardiff.ac.uk/id/eprint/93347

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