声子
热导率
凝聚态物理
散射
声子散射
材料科学
电子
原子质量
电子散射
物理
原子物理学
光学
复合材料
核物理学
作者
R. K. Williams,D.W. Yarbrough,J. W. Masey,Tobias Holder,R.S. Graves
摘要
A study of the factors which affect the thermal conductivity of αFe and its solutions is described. The results of these experiments define the phonon and electronic components of the thermal conductivity of pure αFe fairly well between 90 and 400 K. Also, the phonon conductivity can be analyzed to identify the strengths of electron-phonon and phonon-phonon scattering, and the latter resistance is in good agreement with theoretical estimates. The scattering of phonons by electrons is intermediate between the small values for noble metals and the strong scattering found in Nb and Ta. An experimental estimate of the electron-phonon mass enhancement factor, 0.4, is derived from the results. Finally, reexamination of the data for ten solid solution alloys suggests that both phonon-scattering mechanisms are influenced by the alloying elements.
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