The isothermal process of chemical vapor deposition for the densification with a SiC-matrix of organomorphic carbon-fiber preforms obtained by carbonization of compressed fibers of oxidized polyacrylonitrile is investigated. Such preforms are characterized by a high (up to 70%) porosity and uniform pore size (the reduced pore diameter ranges from several micrometers to tens of micrometers). Technological parameters of the process of obtaining ceramic-matrix composites (CMC) were optimized by a combination of experimental studies and numerical simulations. Experimental samples of CMC were obtained using a non-halogen precursor, methylsilane CH₃SiH₃, and their residual porosity was determined. For the numerical study of the gas-phase process of densification of preforms, a 1D model was used. The simulation results were compared with experimental observations.

研究了化学气相沉积的等温过程，以通过碳化聚丙烯腈压缩碳的碳化获得的有机形态碳纤维预成型坯的SiC基体致密化。这样的预成型件的特征在于高的孔隙率（高达70％）和均匀的孔径（减小的孔径范围从几微米到几十微米）。通过结合实验研究和数值模拟，优化了陶瓷基复合材料（CMC）的制备过程中的技术参数。使用非卤素前驱物甲基硅烷CH ₃ SiH ₃获得CMC的实验样品，并确定其残余孔隙率。为了对预成型坯的气相致密化过程进行数值研究，使用了一维模型。仿真结果与实验结果进行了比较。