Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
DEVELOPMENT AND PRODUCTION OF CERAMIC MATRIX BASED ON ZIRCONIA-TITANIA REINFORCED WITH RARE EARTH OXIDE FOR AEROSPACE EXHAUST SYSTEMS
Submission Author:
Natasha Gomes , PE
Co-Authors:
Natasha Gomes, Ricardo Artur Sanguinetti Ferreira, Yogendra Prasad Yadava
Presenter: Natasha Gomes
doi://10.26678/ABCM.COBEM2017.COB17-0590
Abstract
The reliability and availability of aerospace turbines is a constant concern since they operate at high temperatures and may fail prematurely. These are composed of alloys of nickel and cobalt, and can be coated with ceramic materials that perform well under high temperatures. Studies have been carried out on the use of zirconia (ZrO2) incorporated with other oxides for this type of coating, because in comparison with other ceramics, it has superior mechanical properties, such as high mechanical strength, chemical stability and good fracture toughness. In this work, zirconia-titania ceramic matrix (ZrO2-TiO2) reinforced with lanthanum (La2O3) was produced, with content of TiO2 in 15% and varying the content of La2O3 in 5%, 7% and 10%. The ceramic matrix composites were characterized by X-ray diffraction, scanning electron microscopy and Vickers microhardness. The results showed that the composite with 10% La2O3 and 15% TiO2 obtained a better result, indicating that this composite has good physical properties that point to possible applicability. However, it is necessary to evaluate other mechanical properties in order to ensure their use.
Keywords
aerospace turbines, coating, ceramic matrix composites, zirconia-titania, La2O3.
