Effect of point defects on the phonon thermal conductivity of bcc iron

The effects of low concentrations of seven different substitutional impurities on the phonon thermal conductivity of iron were determined at 300 K. Of the seven solutes, Ni caused the smallest reduction and W the greatest. The data were analyzed on the basis of Callaway’s model, and the resulting im...

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Bibliographic Details
Published in:Journal of applied physics 1987-10, Vol.62 (7), p.2778-2783
Main Authors: WILLIAMS, R. K, GRAVES, R. S, WEAVER, F. J, YARBROUGH, D. W
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Other topics in thermal properties of condensed matter
Physics
Specific materials
Thermal properties of condensed matter
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Summary:The effects of low concentrations of seven different substitutional impurities on the phonon thermal conductivity of iron were determined at 300 K. Of the seven solutes, Ni caused the smallest reduction and W the greatest. The data were analyzed on the basis of Callaway’s model, and the resulting impurity scattering was compared with theory. The data show that phonon scattering from the local strain field associated with point defects is smaller than predicted from theory, but not negligible. The results are consistent with theoretical formulas that show that mass difference and lattice-strain scattering can either reinforce or cancel.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.339406