The Effect of a Small Amount SiO2 on Sintering Kinetics of Tetragonal Zirconia Nanopowders
| Autor: | Galina Volkova, Valery Burkhovetskiy, Igor Danilenko, Igor Nosolev, Susanna Syniakina, Tetyana Konstantinova, Marharyta Lakusta, Oksana Gorban |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Sintering kinetics Mixing (process engineering) Nanochemistry Sintering 02 engineering and technology 01 natural sciences Initial sintering stage 0103 physical sciences lcsh:TA401-492 Grain boundary diffusion coefficient General Materials Science Cubic zirconia 010302 applied physics Zirconia nanopowders Nano Express Metallurgy 021001 nanoscience & nanotechnology Condensed Matter Physics Sintering mechanisms Chemical engineering Volume (thermodynamics) Silica additive lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Tetragonal zirconia |
| Zdroj: | Nanoscale Research Letters, Vol 12, Iss 1, Pp 1-9 (2017) Nanoscale Research Letters |
| ISSN: | 1931-7573 |
| DOI: | 10.1186/s11671-017-2178-6 |
| Popis: | In the present paper the sintering behavior of 3 mol% yttria-stabilized zirconia (3Y-TZP) with and without small amount (0.2 wt %) of SiO2 additive was investigated. It has been studied the silica impact which was added in two ways (co-precipitation and mechanical mixing) on sintering kinetics of 3Y-TZP nanopowders at the initial sintering stage. It was found the silica additive leads to the changing in the predominant sintering mechanism at the initial sintering stage from volume (VD) to the grain boundary diffusion (GBD) in nanopowders obtained by co-precipitation. It was shown that the way of silica addition also significantly influence the sintering kinetics of 3Y-TZP. In case of nanopowders with silica additive obtained by mixing method, sintering process occurred due to the predominance of VD mechanism. It was found that the silica additive and the mechanical activation leads to the acceleration of the sintering process. |
| Databáze: | OpenAIRE |
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