Method for treating the surface of a part made of a heat-structured composite material and use thereof in brazing parts made of a heat-structured composite material
OwnerJacques Thebaultinventor
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Abstract
A liquid composition is applied onto the surface of the part to be treated, the composition containing a ceramic precursor polymer and a refractory solid filler. After cross-linking, the polymer is transformed into ceramic by heat treatment, and subsequently ceramic is deposited by chemical vapor infiltration. Before the chemical vapor infiltration step, the surface of the part is shaved so as to return the composite part to its initial shape so that the chemical vapor infiltration forms a deposit that fills in the residual micropores in the shaved surface of the part.
Claims18
A method of treating the surface of a part made of thermostructural composite material possessing a surface that is porous and of rough appearance, the method comprising applying onto the surface of the part a liquid composition containing a ceramic precursor polymer and a refractory solid filler, cross-linking the polymer, transforming the cross-linked polymer into ceramic by heat treatment, and subsequently forming a ceramic deposit by chemical vapor infiltration, the method being characterized in that prior to the step of chemical vapor infiltration, the surface of the part is shaved to return the part made of composite material to its initial shape so that the chemical vapor infiltration forms a deposit that fills in the residual micropores in the shaved surface of the part.
Dependencies are inferred from the claim text.