Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Physical, mechanical and microstructural characterization of ZTM ceramics as a TBC prospective material
Submission Author:
Bruna Constantino , PE
Co-Authors:
Bruna Constantino, Yogendra Prasad Yadava
Presenter: Bruna Constantino
doi://10.26678/ABCM.COBEM2021.COB2021-0345
Abstract
Thermal barrier coatings are widely used as thermal protection of heated parts of metal components of gas turbines. Currently, ZrO2 ceramics play an important role in this technological field. The addition of amounts of yttria, magnesia and other oxides supports the stabilization of the tetragonal phase after cooling, improving the ceramic behavior. In this study, a Zr-based material was produced as a candidate of TBC material. The influence of titanium oxide in a Mg-PSZ matrix was investigated on the physical, mechanical and microstructural characteristics, as a candidate of TBC material. TiO2 was incorporated into the ZrO2 matrix, whose tetragonal phase was stabilized by the addition of magnesium oxide (24% by weight). The ceramics were formed by cold uniaxial compaction and consolidate through solid-phase sintering, at different temperatures – 1250 and 1350 ºC for 24 hours. The ceramics were evaluated using scanning X-ray diffraction, electron microscopy, Vickers microhardness and physical tests (density and porosity). The analysis indicate that the addition of titania improved the sintering, resulting in better densification, while decreased porosity.
Keywords
solid-state sintering, tetragonal zirconia, Microstructure, thermal barrier coating
