Temperature dependence of thermal conductivity in W and W–Re alloys from 300 to 1000 K
| Autor: | C. Eamchotchawalit, Masakazu Fujitsuka, T. Tanabe, S. Taweethavorn, T. Shikama, C. Busabok |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Phonon Mechanical Engineering Metallurgy Alloy chemistry.chemical_element Electron engineering.material Conductivity Tungsten Condensed Matter Physics Thermal diffusivity Thermal conductivity chemistry Mechanics of Materials Powder metallurgy engineering General Materials Science Composite material |
| Zdroj: | Materials Letters. 57:2950-2953 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/s0167-577x(02)01403-9 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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