Polytype induced exaggerated grain growth in ceramics
| Autor: | Drago Kolar, Aleksander Rečnik, Miran Čeh |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
geography
Materials science geography.geographical_feature_category Oxide Mineralogy Fault (geology) Crystal chemistry.chemical_compound Grain growth chemistry Chemical physics Phase (matter) visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Crystallite Perovskite (structure) |
| Zdroj: | Journal of the European Ceramic Society. 21:2117-2121 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/s0955-2219(01)00184-4 |
| Popis: | In polycrystalline materials we frequently observe exaggerated growth of some grains. One of the reasons for such growth irregularity, which we describe here, is the formation of polytypic sequences within the affected grains. We present an atomic-level study of the polytypic faults that are found in sintered perovskite ceramics with various oxide additions. Grains containing polytypic faults grow preferentially along the direction of fault planes. Results from this study indicate that both the local structure and chemistry of these faults are intimately related to the host crystal and the secondary phase that exists between the main phase and the additive. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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