| 摘要 |
<p>The process comprises forming a consolidated fibrous preform by shaping a fibrous structure in refractory fibers impregnated with a consolidation composition comprising a carbon or ceramic precursor resin, and transforming the resin and solid carbon or ceramic residue by pyrolysis, and densifying the preform by a refractory matrix with a preliminary formation of an interphase between the fibers of the preform and the matrix. Before impregnation with the consolidation composition, a first interphase layer is formed on the fibers of the fibrous structure. The process comprises forming a consolidated fibrous preform by shaping a fibrous structure in refractory fibers impregnated with a consolidation composition comprising a carbon or ceramic precursor resin, and transforming the resin and solid carbon or ceramic residue by pyrolysis, and densifying the preform by a refractory matrix with a preliminary formation of an interphase between the fibers of the preform and the matrix. Before impregnation with the consolidation composition, a first interphase layer is formed on the fibers of the fibrous structure by chemical gas phase infiltration with a thickness of less than 100 nm, and after processing the solid carbon or ceramic residue, a second interphase layer is formed by chemical vapor phase infiltration. The first and second interphase layers include carbon pyrolytic material, boron nitride and boron doped carbon. The second interphase layer includes silicon carbide layer. The first and second interphase layers have a thickness of 10-50 nm and = 100 nm. The transformation of solid carbon or ceramic residue and the formation of the second interphase layer are carried out in a chain process in an oven. An independent claim is included for a thermostructural composite material.</p> |
