Abstract:Isothermal chemical vapor infiltration(ICVI) was used to study carbon cloth stitched preform densifi鄄
cation process,methane was the precursor,at the temperature of 1 368 K and residence time of 1 s. Carbon cloth
stitched preform porosity distribution under different time was characterized by mercury porosimetry, and the pyrocar鄄
bon structure was observed by PLM. It is found that the porosity presented multipeek shape,and pyrocarbon deposition
rate and [A / V]value showed a inverse correlation throughout the whole study process. The texture of the pyrocarbon
had a relationship with the specific surface area. Isotropic and low textured pyrocarbon was first got at the initial of in鄄
filtration,then high textured pyrocarbon was discovered at larger size pores like the edge of the bundle.
