Calculating the Thermal Conductivity of Heated Powder Compacts
| Autor: | Amikam Birnboim, Yuval Carmel, Tayo Olorunyolemi |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Surface diffusion
Work (thermodynamics) Materials science Composite number Mineralogy Sintering Dielectric Microstructure Condensed Matter::Materials Science Thermal conductivity Condensed Matter::Superconductivity visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material |
| Zdroj: | Journal of the American Ceramic Society. 84:1315-1320 |
| ISSN: | 1551-2916 0002-7820 |
| DOI: | 10.1111/j.1151-2916.2001.tb00835.x |
| Popis: | This work is devoted to the theoretical understanding of the microstructure and thermal conductivity relationships of compacted ceramic powders in the initial, nondensifying stage of sintering. A model based on surface diffusion of vacancies for the growth of the neck between particles is combined with numerical fully three-dimensional code calculations, which solve for the effective heat conductivity coefficient of lightly sintered particles. The predictions of the model are in agreement with experimental observations. The approach presented can be applied to solve a series of related problems, like dielectric properties, with arbitrary microstructure and multicomponent composite of the powders. |
| Databáze: | OpenAIRE |
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