Abstract: A method for producing a thermal barrier in a multilayered system for protecting a metal part made of superalloy, by producing a thermal treatment by flash sintering protection materials in layers superposed on the metal part in an SPS machine enclosure. The layers contain, on a superalloy substrate, at least two layers of zirconium-based refractory ceramics. A metal part is produced according to a SPS flash sintering method and contains a superalloy substrate, a metal sub-layer, a TGO oxide layer and the thermal barrier formed by the method. A first ceramic is an inner ceramic designed to have a substantially higher expansion coefficient. An outer ceramic is designed to have at least lower thermal conductivity, and at least one of a sintering temperature or maximum operating temperature that is substantially higher. The thermal barrier has a composition and porosity gradient from the metal sub-layer to the outer ceramic.
Type:
Application
Filed:
March 7, 2012
Publication date:
December 26, 2013
Applicants:
SNECMA, UNIVERSITE PAUL SEBATIER-TOULOSE III (UPS), INSTITUT NATIONAL POLYTECHNIQUE DE TOULOUSE (INPT), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
Inventors:
Juliette Hugot, Mathieu Boidot, Daniel Monceau, Djar Oquab, Claude Estournes