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AssigneesSnecma, Commisariat a l'Energie Atomique, Institut National Polytechnique de Grenoble
InventorsJoel Michel Daniel Benoit, Jean-Francois Fromentin, Valerie Chaumat, Olivier Gillia, Nikolas Eustathopoulos, Fiqiri Hodaj, Alexey Koltsov
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An assembly between a metal piece and a ceramic material piece made of SiC and/or C based ceramic material. The assembly includes a stack structure including the following elements assembled together in pairs in this order, by brazing: the metal piece; a first intermediate piece; a second intermediate piece; and the ceramic material piece. The second intermediate piece is made of another ceramic material, that is chemically less reactive relative to metals than are SiC or C, and that presents a coefficient of expansion smaller than that of the material constituting the metal piece. The first intermediate piece is made of metal and can deform to compensate for expansion difference between the metal piece and the second intermediate piece. The assembly can be used in a turbomachine.
An assembly between a metal piece and a ceramic material piece made of a SiC and/or C based ceramic material, the assembly comprising:
A brazing composition for assembling two pieces together by brazing, one of the pieces being made of a ceramic based on SiC and/or on C, and the other piece being made of a ceramic based on SiC, on C, on AlN, or on mullite, the composition being essentially constituted by a mixture of PrSi2 and of Si, in which Si is in the majority and Pr in the minority, in atomic percentages.
Dependencies are inferred from the claim text.