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Título: | Protective nature of nano-TiN coatings shaped by EPD on Ti substrates |
Autor: | Mendoza Gallego, Carlos; González Granados, Zoilo CSIC ORCID; Gordo Odériz, Elena; Ferrari, Begoña CSIC ORCID ; Castro Martín, Yolanda CSIC ORCID | Palabras clave: | TiN Colloidal processing Protective Behavior Ti Electrophoretic Deposition |
Fecha de publicación: | 2018 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 38: 495- 500 (2018) | Resumen: | The hardness and corrosion resistance of TiN coatings, processed by Electrophoretic Deposition (EPD) to cover polished and unpolished Ti substrates, have been evaluated. A deposition time of 5 min has been enough to obtain a cohesive layer of 7–8 μm in thickness. The coatings were thermally treated in vacuum atmosphere at 1200 °C for 1 h with heating and cooling rates of 5 °C min. The surfaces have been covered homogeneously optimizing the properties of the Ti substrates. Uniform and dense TiN coatings have been obtained onto polished substrates, while on unpolished Ti the nitrogen diffuses toward the substrate, moderately dissolving TiN coating. The nanohardness values of the polished samples have been increased from 2.8–4.8 GPa up to 6.5–8.5 GPa. Besides, the corrosion current density has been reduced more than one order of magnitude obtaining a protective efficiency of 82%. These values have been compared with other works in literature where authors used complex and costly processing techniques, demonstrating the strong impact of the colloidal processing over the specific properties of the material. | Versión del editor: | http://dx.doi.org/10.1016/j.jeurceramsoc.2017.09.046 | URI: | http://hdl.handle.net/10261/191588 | DOI: | 10.1016/j.jeurceramsoc.2017.09.046 | Identificadores: | doi: 10.1016/j.jeurceramsoc.2017.09.046 e-issn: 1873-619X issn: 0955-2219 |
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Mendoza_Protective_JECS-D-17-01032R1.pdf | 1,59 MB | Adobe PDF | Visualizar/Abrir |
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