Synthesis of the Fiber Coating by FP-CVI Process

Fabrication and Properties of Cf/SiC–ZrC Composites

“…Before impregnation by the abovementioned slurry, some carbon fibers were deposited with PyC interphase (B100 nm) or PyC/SiC interphase (B100/100 nm) by forced pressure-pulsed chemical vapor infiltration (FP-CVI) using methane and methyltrichlorosilane (MTS) at 10501C. 7 The source gases introduced into the reaction tube were evacuated to below 300 Pa using vacuum pumps within 5 s after holding for a certain time. The deposition conditions for PyC interphase were as follows: pressure 10 kPa and hold time 15 s; and those for SiC interphase were as follows: pressure 15 kPa, hold time 5 s and molar ratio of H 2 to MTS was 10.…”

“…Carbon fibers (M40JB, 6K, Toray, Tokyo, Japan), which were first wound to form aligned sheets were used as the reinforcements of the composites. Before impregnation by the above‐mentioned slurry, some carbon fibers were deposited with PyC interphase (∼100 nm) or PyC/SiC interphase (∼100/100 nm) by forced pressure‐pulsed chemical vapor infiltration (FP‐CVI) using methane and methyltrichlorosilane (MTS) at 1050°C 7 . The source gases introduced into the reaction tube were evacuated to below 300 Pa using vacuum pumps within 5 s after holding for a certain time.…”

Mechanical properties and microstructures of Cf/SiC–ZrC composites using T700SC carbon fibers as reinforcements

“…Carbon fibers were first wound to graphite frames to form fiber sheets and some were coated with PyC or PyC/SiC interphase by forced pressure-pulsed chemical vapor infiltration (FP-CVI) [11]. Commercially available ZrC powders were mixed with PCS (National University of Defense Technology, Changsha, China) with weight ratio of 50%:50%, using xylene as solvent to form homogenous dispersed slurry.…”

Fabrication and Properties of 3‐D Cf/SiC–ZrC Composites, Using ZrC Precursor and Polycarbosilane

“…Usually, they are applied in the form of ZrB 2 /ZrC–SiC composite to get a better ablation resistance, which can form a glass layer of ZrSiO 4 when used in oxidative atmosphere . Recently, some researchers have introduced UHTCs particles into C f /SiC composites using polymer infiltration and pyrolysis (PIP) process and studied the high‐temperature performance of the resulting composites . However, the direct introduction of UHTC particles is not beneficial for homogeneous distribution of UHTC phase in the composites.…”