Increasing the densification efficiency in the manufacturing technologies of high-density carbon-carbon composite materials

Carbon-carbon composite materials (CCCM) are used in extreme environments due to their high-temperature erosion resistance, ablative resistance, and high mechanical performance at extremely high temperatures. The production of such materials includes several cycles of gas-phase or liquid-phase compaction of a porous reinforcement of carbon fibers. The article analyzes the main parameters and technological schemes of densification, and their role in manufacturing CCCM. Conditions of optimizing technological regimes and routes of multi-cycle densification for obtaining high-density CCCM with a minimum number of cycles are proposed. A method for calculating density and porosity changes during multi-cycle compaction of CCCM is developed. The accuracy of this method is confirmed by experimental data.