| Autor: |
Trichês, D. M., de Lima, J. C., Souza, S. M., Poffo, C. M., Grandi, T. A., de Biasi, R. S. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Oct2011, Vol. 110 Issue 8, p083528, 9p |
| Abstrakt: |
High-purity elemental Co and Sb powders were blended with nominal composition CoSb3 and submitted to mechanical alloying. After 30 h of milling, the x-ray diffraction (XRD) pattern was indexed to skutterudite CoSb3 and monoclinic CoSb2. The differential scanning calorimetry (DSC) thermogram of the as-milled powder showed an exothermic peak at 615 K, which seems to be related to monoclinic-orthorhombic transformation of CoSb2. To confirm this transformation, annealing at 823 K of as-milled powder was performed and the XRD pattern of the product was indexed to skutterudite CoSb3 and orthorhombic CoSb2. The Raman spectra of as-milled and annealed samples showed only the active Raman modes of CoSb3. From the photoacoustic measurements of as-milled and annealed samples, the thermal diffusivity and other transport properties were computed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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