Densification and grain growth of 8YSZ containing NiO
| Autor: | Eliana N. S. Muccillo, R. M. Batista |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Scanning electron microscope Process Chemistry and Technology Non-blocking I/O Metallurgy technology industry and agriculture Sintering Activation energy A. Sintering Microstructure Electronic Optical and Magnetic Materials Surfaces Coatings and Films Grain growth Chemical engineering Materials Chemistry Ceramics and Composites Zirconia Grain boundary diffusion coefficient Cubic zirconia A. Grain growth |
| Zdroj: | Ceramics International. 37(3):1047-1053 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2010.11.031 |
| Popis: | The effects of NiO addition on sintering yttria-stabilized zirconia were systematically studied to understand the role of the additive in the sintering process of the solid electrolyte. Specimens of 8 mol% yttria-stabilized zirconia with NiO contents up to 5.0 mol% were prepared using different Ni precursors and sintered at several dwell temperatures and holding times. Densification and microstructural features were studied by apparent density measurements and scanning electron microscopy observations, respectively. The sintering dynamic study was carried out by following the linear shrinkage of powder compacts containing 0–0.75 mol% NiO. Small (up to 1.0 mol%) NiO addition was found to improve the sinterability of yttria-stabilized zirconia. The activation energy for volume diffusion decreases with increasing NiO content, whereas the grain boundary diffusion seems to be independent on this additive. The grain growth of yttria-stabilized zirconia is found to be enhanced even for small NiO contents. |
| Databáze: | OpenAIRE |
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