elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Dispersion of multi-walled carbon nano tubes in skutterudites and its effect on thermoelectric and mechanical properties

Schmitz, Andreas and Schmid, Carolin and de Boor, Johannes and Müller, Eckhard (2017) Dispersion of multi-walled carbon nano tubes in skutterudites and its effect on thermoelectric and mechanical properties. Journal of Nanoscience and Nanotechnology. American Scientific Publishers. DOI: 10.1166/jnn.2017.13727 ISSN 1533-4880

Full text not available from this repository.

Abstract

Filled cobalt-antimony based skutterudites have proven themselves as very promising thermoelectric materials for generator applications in an intermediate temperature range between 400 and 800 K due to their high figure of merit. Besides the functional thermoelectric properties also the skutterudites’ mechanical properties play an important role to withstand external mechanical and internal thermomechanical loads during operation. Properties of interest are hardness as well as fracture toughness and resistance to fatigue. Carbon nano tubes are well known for their high tensile strength and may therefore be used to increase the mechanical strength of composite materials. Additionally, the thermoelectric properties of the composite material might benefit from the high electrical conductivity of carbon nano tubes and increased phonon scattering at interfaces between matrix and carbon nano tube. A main precondition for benefiting from embedded nano-tubes is to achieve a homogeneous distribution of the CNTs and good adhesion between carbon nano tube and matrix material. In this work we present the influence of the introduction of multi-walled carbon nano tubes on the thermoelectric and mechanical properties of p-type skutterudites Ce0.14La0.06Co2Fe2Sb12. The influence of different carbon nano tube concentrations and preparation routes on the resulting composite material’s thermoelectric, mechanical and microstructural properties is studied. A reduction of electrical and thermal conductivity as well as fracture strength is observed with increasing carbon nano tube content which is attributed to strong agglomeration of the nano tubes. The results underline the pivotal role of a homogeneous distribution of the carbon nano tubes for improving the mechanical properties of skutterudites.

Item URL in elib:https://elib.dlr.de/115097/
Document Type:Article
Title:Dispersion of multi-walled carbon nano tubes in skutterudites and its effect on thermoelectric and mechanical properties
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmitz, Andreasgerman aerospace center, institute of materials research, köln, germanyUNSPECIFIED
Schmid, Carolingerman aerospace center, institute of materials research, köln, germanyUNSPECIFIED
de Boor, Johannesgerman aerospace center, institute of materials research, köln, germanyhttps://orcid.org/0000-0002-1868-3167
Müller, Eckhardgerman aerospace center, institute of materials research, köln, germanyUNSPECIFIED
Date:1 March 2017
Journal or Publication Title:Journal of Nanoscience and Nanotechnology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1166/jnn.2017.13727
Publisher:American Scientific Publishers
ISSN:1533-4880
Status:Published
Keywords:Carbon nano tubes; Mechanical properties; Skutterudites; Thermoelectric properties; Thermoelectricity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC-Antriebsstrang (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:22 Nov 2017 10:20
Last Modified:06 Sep 2019 15:16

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.