Abstract
The isothermal process of gas-phase chemical deposition for the compaction of organomorphic carbon-fiber preforms with a SiC-matrix obtained by carbonization of compressed fibers of oxidized polyacrylonitrile has been investigated. Their feature is high (up to 70 %) and uniform pore size (reduced pore diameter from several micrometers to several tens of micrometers) porosity. The problem of optimizing the technological parameters of the process of obtaining ceramic-matrix composites (CMC) was solved by a combination of experimental research and numerical modeling. Experimental samples of CMC were obtained using a non-halogen precursor of methylsilane CH3SiH3, and their residual porosity was determined. For the numerical study of the gas-phase process of compaction of preforms, a 1D model was used. The simulation results were compared with experimental observations.
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