Mechanical and Hydraulic Properties of Open-Cell Vitreous Carbon Foams Manufactured by Different Methods

摘要

The paper reports on comparative studies of mechanical strength and hydraulic permeability of opencellvitreous carbon foams manufactured by different methods. Vitreous carbon foam were manufacturedeither by infiltration of the epoxy precursor resin into a layer of pore-forming removable granulesor by replication of the structure of the polyurethane foam template with the phenolic precursor resinfollowed by pyrolysis of the precursor resins in neutral gaseous environment. It was stated that the vitreouscarbon foams manufactured by the replication method had higher hydraulic permeability comparedto the vitreous carbon foams manufactured by infiltration, but had poorer mechanical strength atsimilar cell diameter and within similar relative densities range. Recommendations for the use of thestudied foams in various areas have been proposed.