PRODUCTION AND SINTERING BEHAVIOR OF ZrO2-TiO2-La2O3 CERAMIC COMPOSITES FOR APPLICATIONS IN EXHAUST SYSTEMS IN AEROSPACE INDUSTRY
Natasha Lopes Gomes1; Ricardo Artur Sanguinett Ferreira1; Yogendra Prasad Yadava1
1 Universidade Federal de Pernambuco
doi:10.20906/CPS/COB-2015-2628
Resumo
Ceramic matrix composites have emerged as a promising class for aerospace application due to its greater ability to withstand high temperatures and requiring less cooling air in order to reduce fuel consumption and improve performance. But the intrinsic fragility of the ceramic is still a crucial factor for use of these materials in mechanical and industrial applications structures. To reduce the brittleness, increase the mechanical strength and fracture toughness, the ceramic is reinforced by incorporating the addition of one or more ceramic phases. Knowing that the zirconium oxide (ZrO2) when incorporated with other oxides can promote polycrystalline zirconia with superior properties, this work aims to develop zirconia-titania (TiO2-ZrO2) ceramic matrix composites reinforced by La2O3) an oxide of rare earth, which presents high mechanical strength and resistance to high temperature environment for application in engine exhaust system used in the aerospace industry.
Palavras-chave: ZrO2-TiO2-La2O3 ; sintering behavior; aerospace industry