کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1567703 | 999870 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal transport properties of hafnium hydrides and deuterides
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
The thermal conductivities of δâ²-, δ-, δ+ε-, and ε-phase hafnium hydrides and deuterides with various hydrogen isotope concentrations (HfHx, 1.48 ⩽ x ⩽ 2.03; HfDx, 1.55 ⩽ x ⩽ 1.94) were evaluated within the temperature range of 290-570 K from the measured thermal diffusivity, calculated specific heat, and density. The thermal conductivities of δâ²-, δ-, δ+ε-, and ε-phase HfHx and HfDx are independent of the temperature within the range 300-550 K and are in the range 0.15-0.22 W/cm K and 0.17-0.23 W/cm K, respectively; these values are similar to and lower than the observed thermal conductivities of α-phase Hf. The experimental results for the electrical resistivities of δâ²-, δ-, δ+ε-, and ε-phase HfHx and HfDx and the Lorenz number corresponding to the electronic conduction, obtained from the Wiedemann-Franz rule, indicated that heat conduction due to electron migration significantly influences the thermal conductivity values at high temperatures. On the other hand, heat conduction due to phonon migration significantly affects the isotope effects on the thermal transport properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 392, Issue 3, 1 August 2009, Pages 464-470
Journal: Journal of Nuclear Materials - Volume 392, Issue 3, 1 August 2009, Pages 464-470
نویسندگان
B. Tsuchiya, Y. Arita, H. Muta, K. Kurosaki, K. Konashi, S. Nagata, T. Shikama,