Incorporation of zirconia into coatings formed by DC plasma electrolytic oxidation of aluminium in nanoparticle suspensions
| Autor: | Raul Arrabal, Endzhe Matykina, G.E. Thompson, F. Monfort, Peter Skeldon |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Metallurgy technology industry and agriculture General Physics and Astronomy chemistry.chemical_element Nanoparticle Surfaces and Interfaces General Chemistry Electrolyte engineering.material Plasma electrolytic oxidation equipment and supplies Condensed Matter Physics Microstructure Silicate Surfaces Coatings and Films chemistry.chemical_compound Coating chemistry Chemical engineering Aluminium engineering Cubic zirconia |
| Zdroj: | Applied Surface Science. 255:2830-2839 |
| ISSN: | 0169-4332 |
| Popis: | A study has been carried out to investigate the incorporation of zirconia into alumina-based coatings formed on aluminium using DC plasma electrolytic oxidation in phosphate and silicate electrolytes containing zirconia nanoparticles in suspension. The nanoparticles were incorporated mainly near the coating surface and within cavities inside the coatings. Additionally, a silicon-rich, surface deposit appeared to entrain the nanoparticles of the silicate electrolyte. Zirconia was also present in cellular microstructures of the main alumina-rich coating layers, suggesting melting at >1710 °C and subsequent solidification. The coatings frequently contained tetragonal zirconia in addition to monoclinic zirconia, with the presence of zirconia also affecting the proportions of γ- and α-alumina in favour of the former phase. |
| Databáze: | OpenAIRE |
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