Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1626627 | Journal of Alloys and Compounds | 2007 | 6 Pages |
Abstract
We measured the thermal conductivity of an icosahedral quasicrystal i-Al72Pd19.5Mn8.5 in the temperature range between 0.4Â K and 300Â K. The analysis of the low-temperature results was based on a Debye-type model. The results of the analysis for the two temperature regions of 0.4Â KÂ <Â TÂ <Â 40Â K and 0.4Â KÂ <Â TÂ <Â 1Â K, are not consistent in the sense that a tunnelling-states contribution to phonon scattering is verified only for 0.4Â KÂ <Â TÂ <Â 1Â K. The same fitting procedure indicates that structural defects of the stacking-fault type are an important source of phonon scattering. Their physical presence was clearly identified by a transmission electron microscopy experiment.
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Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
A. BiluÅ¡iÄ, A. Smontara, J. DolinÅ¡ek, P. McGuiness, H.R. Ott,