Recubrimientos multicapa microestructurados de ZrO2-Y2O3-Al2O3 obtenidos por la vía sol-gel para aplicaciones tecnológicas

Abstract

Structures and coatings of zirconia (ZrO2) and alumina (Al2O3) are frequently used in many technological applications. Common examples are cutting tools, thermal barrier coatings, combustion chambers, etc. In these and other applications, the materials work under extreme conditions (high contact stresses, chemical agents, etc.) which can induce catastrophic failure of the system. The general objective of the project is to design, fabricate and characterize microstructured and multilayered coatings based on ZrO2-Y2O3 and ZrO2-Y2O3-Al2O3 systems, by the adequate combination of sol-gel method and dip-coating technique. In particular, we studied the influence of % Al2O3, built in the protective films, investigating their influence on the characteristics and properties of the coatings in order to establish the guidelines to follow in designing more resilient, tenacious multilayer structures microstructured and with improved surface properties.