Porous Material Infiltration via Pressure Reduction

The infiltration process is divided into distinct phases: initial heating phase at atmospheric pressure to prepare the porous matrix and second material, followed by a vacuum phase at elevated temperature to drive capillary infiltration. This segmentation allows each phase to be optimized independently, achieving complete infiltration while using a relatively simple single-chamber device rather than a complex multi-station system.

The porous matrix and second material are preheated to the infiltration temperature before applying vacuum pressure. This preliminary heating action ensures that when vacuum is applied, the materials are already in the optimal state for infiltration, eliminating the need for gradual progressive heating through multiple stations and significantly reducing overall processing time.

Both the porous matrix and second material are heated to the target infiltration temperature while at atmospheric pressure before vacuum is applied. This preliminary heating eliminates the time required for gradual temperature increases during the vacuum phase, allowing the infiltration process to begin immediately when vacuum is applied, thus significantly reducing total processing time while ensuring complete infiltration.

The heating process continues uninterrupted during the transition to vacuum and throughout the infiltration phase. By maintaining continuous heating at the infiltration temperature throughout the vacuum infiltration process, the system ensures complete and uniform infiltration of all capillaries without requiring multiple heating cycles or pauses, thereby minimizing processing time.

The system performs preliminary heating of both the porous matrix and second material to the infiltration temperature before applying vacuum pressure. This ensures that when pressure reduction begins, the materials are already in the optimal temperature state for rapid capillary infiltration, achieving both good control and high efficiency simultaneously.

The process utilizes a sharp, controlled transition from atmospheric to vacuum pressure at a specific temperature threshold. By changing the pressure parameter abruptly at the optimal temperature point rather than gradually, the system triggers rapid capillary action that efficiently drives infiltration through all pore sizes simultaneously, achieving both controllability and high productivity.