ImpactU Versión 3.11.2 Última actualización: Interfaz de Usuario: 16/10/2025 Base de Datos: 29/08/2025 Hecho en Colombia
Resistencia a la corrosión y al desgaste de recubrimientos nanoestructurados de Zirconia (ZrO2) – Plata (Ag) y/o Alúmina (Al2O3) obtenidos con técnica de “Sputtering” reactivo con magnetrón desbalanceado
In this work, the effect of doping materials (alumina and / or silver) on the corrosion and wear resistance properties of zirconia nanostructured coatings stabilized with yttria was evaluated. Substrates of 316L steel, glass and monocrystalline silicon (100) were coated by the RF technique "sputtering", with unbalanced magnetron. To obtain the coatings, a zirconia target stabilized with yttria (YSZ) 8%m and geometrically homogeneous metal pieces of aluminum and silver were used. The YSZ ceramic coatings and the ceramic-metal coatings (YSZ + Ag) were obtained with the RF-sputtering process not reactive with argon atmosphere; while the ceramic coatings (YSZ + Al2O3) were obtained from the YSZ ceramic white and metallic aluminum pieces by means of the reactive RF-sputtering process, for which an Ar / O2 mixture in relation 80/20 was added. The chemical composition of the coatings was changed by modifying the amount of pieces of dopant metal material. The chemical composition of the coatings was determined using the EDS and XPS techniques, the microstructure with the XRD technique, the corrosion was determined with EIS and Tafel electrochemical techniques and finally the mechanical properties were determined with nanoindentation, scratch and pin on disk. With the EDS technique, variations in the chemical composition of aluminum were found from 1.6%w to 5.6%w, and variations in the chemical composition of silver from 9.5%w to 61%w. All the coatings presented good resistance to corrosion. Based on the results of hardness (H) and modulus of elasticity (E), the H3/E2 ratio was established, which shows a better wear resistance behavior for YSZ coatings doped with a high content of Al2O3. The coatings doped with Al2O3 showed adhesive wear, while the coatings doped with Ag showed erosive wear.