Temperature dependence of thermal conductivity in W and W–Re alloys from 300 to 1000 K

• Published in: Materials letters 2003-06, Vol.57 (19), p.2950-2953
• Main Authors: Tanabe, T., Eamchotchawalit, C., Busabok, C., Taweethavorn, S., Fujitsuka, M., Shikama, T.
• Format: Article
• Language: English
• Subjects: Alloy; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Conductivity; Exact sciences and technology; Metals. Metallurgy; Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves; Physics; Temperature; Transport properties of condensed matter (nonelectronic)
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/S0167-577X(02)01403-9

The thermal conductivities of W and W–Re alloys with Re contents of up to 25% were obtained from their thermal diffusivity data. The W and W–Re alloys were fabricated by powder metallurgy process. The samples with 8-mm diameter and 1-mm thickness were prepared by wire cutting tool. The thermal diffusivities of W and W–Re alloys were measured from room temperature to 1000 K. The results show that the thermal conductivity of the W decreases while those of W–Re increase when temperature increases. Thermal conductivity due to electron estimated from Wiedeman–Franz–Lorenz law in W decreases with temperature while those in W–Re alloy increases. The contribution of phonon on the thermal conductivity of W with high percent Re proved to be less than the contribution of electron at high temperatures.