Sintering of translucent and single-phase nanostructured scandia-stabilized zirconia
| Autor: | Eliana N. S. Muccillo, Shen J. Dillon, Dereck N.F. Muche, Robson L. Grosso, Ricardo H. R. Castro, Taeko Yonamine |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Coprecipitation Mechanical Engineering Sintering Spark plasma sintering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Nanocrystalline material Grain size 0104 chemical sciences Mechanics of Materials visual_art visual_art.visual_art_medium General Materials Science Cubic zirconia Ceramic Composite material 0210 nano-technology |
| Zdroj: | Materials Letters. 253:246-249 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2019.06.076 |
| Popis: | Fully-dense and single-phase nanostructured scandia-stabilized zirconia specimens were produced by high-pressure spark plasma sintering technique. Nanocrystalline powders were prepared by the coprecipitation method. Green pellets were sintered at temperatures varying from 700 to 900 °C and pressures from 1.4 to 2 GPa, resulting in dense microstructures with single-phase fluorite-type cubic structure within a wide range of Sc2O3 content (6–15 mol%). The average grain size of sintered specimens ranged from 8 to 20 nm. Transmittance spectra confirm translucence in sintered specimens, which is consistent with full density. The results reported here reveal that the polymorphism challenge in the zirconia-scandia system can be successfully suppressed by this consolidation technique, which allows for controlling the grain size of bulk specimens. |
| Databáze: | OpenAIRE |
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