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The effect of the type of carrier gas on the bulk density and microstructure distribution of carbon/carbon (C/C) composites fabricated by thermal gradient chemical vapor infiltration from propylene was investigated. The results show that the type of carrier gas has an appreciable influence on the radial distribution of density and microstructure of the C/C composites. When N 2 is used as carrier...
Multiple quasi three-dimensioned carbon fibre preforms with disk-like shape were simultaneously densified by a directional flow thermal gradient CVI process. The effects of infiltration conditions, including temperature (ranging from 850 to 1050 o C), temperature gradient (5 and 10 o C/mm), pressure (2.5, 5.0, 7.5 and 9.5 kPa) and the type of carrier gas (N 2 or H 2 ...
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