C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/80 (2006.01) C04B 35/628 (2006.01)
Patent
CA 2268019
The invention refers to a method of manufacturing a ceramic composite material comprising matrix and reinforcing materials and an intermediate weak interface material, said composite material being particularly intended for use at temperatures above 1400 °C and in oxidizing environment, the matrix and reinforcing materials consisting of the same or different ceramic oxides having a melting point above 1600 °C, and the interface material providing in combination with said materials a stress field liable to micro-cracking. The invention now suggests that the reinforcing fibre material is immersed into a powder slurry containing carbon (C) and ZrO2 so as to be coated thereby and then dried, after which the composite material is subjected to green forming and densification steps as known per se, and finally a heat treatment in air leaving a porous structure of the interface material.
L'invention porte sur un procédé de fabrication d'un matériau composite céramique comprenant une matrice, des matériaux de renfort, et un matériau interface faible. Ledit matériau composite est particulièrement adapté aux températures supérieures à 1400 DEG C et aux atmosphères oxydantes. La matrice et les matériaux de renfort sont en oxydes céramiques identiques ou différents, d'un point de fusion supérieur à 1600 DEG C, et le matériau interface fournit, en association avec les autres matériaux, un champ de contraintes susceptible de microcraquelures. Selon l'invention, le matériau fibreux de renfort est plongé dans une boue pulvérulente contenant du carbone (C) et du ZrO2 dont il s'imprègne, puis séché. Il est ensuite transformé en pâte verte puis soumis à des étapes de densification connues per se, puis finalement à un traitement thermique laissant une structure poreuse sur le matériau interface.
Holmquist Magnus
Lundberg Robert
Molliex Ludovic
Parlier Michel
Parmentier Julien
Office National D'etudes Et de Recherches Aerospatiales (onera)
Robic
Rolls-Royce Plc
Snecma
Societe Nationale D'etude Et de Construction de Moteurs D'aviati
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