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Dependence of the Elastic Moduli of Skutterudites on Density and Temperature

Published online by Cambridge University Press:  22 June 2011

G. Rogl ,
S. Puchegger ,
M. Zehetbauer ,
A. Grytsiv  and
P. Rogl
G. Rogl
Affiliation:
Institute of Physical Chemistry, University Vienna, Währingerstr. 42, A-1090 Wien, Austria Faculty of Physics, Physics of Nanostructured Materials, University Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
S. Puchegger
Affiliation:
Faculty of Physics, University Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
M. Zehetbauer
Affiliation:
Faculty of Physics, Physics of Nanostructured Materials, University Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
A. Grytsiv
Affiliation:
Institute of Physical Chemistry, University Vienna, Währingerstr. 42, A-1090 Wien, Austria
P. Rogl
Affiliation:
Institute of Physical Chemistry, University Vienna, Währingerstr. 42, A-1090 Wien, Austria
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Abstract

The dependency of Young’s and shear modulus on relative density and temperature was determined for three series of skutterudites: p-type MmyFe3CoSb12 (y = 0.70, 0.80), p-type DDyFe3CoSb12 (y = 0.65, 0.68) and n-type Sr0.07Ba0.07Yb0.07Co4Sb12. For all three groups of materials the dependency of Young’s modulus, E, on the density and temperature is linear: E(d) = 4.1(1)×d – 268(3) GPa (d is the relative density in %), ΔE/ΔT = 0.20(1) GPa/K, thus allowing extrapolation of E as a function of temperature and towards 100% density.

Keywords

elastic propertiesthermoelectricnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1325: Symposium E – Energy Harvesting—Recent Advances in Materials, Devices and Applications , 2011 , mrss11-1325-e03-13
Copyright
Copyright © Materials Research Society 2011

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References

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