Study of pore growth in glassy carbon using small angle x-ray scattering

Abstract

Small angle x-ray scattering was used to study the average pore size in glass-like carbon as a function of both heat treatment time and heat treatment temperature. A pore growth model based on graphitization processes is presented. The simple mechanism shows" that the change "in the average radius of gyration with time is related to the total number of pores as a function of time, which in turn depends on the irreversible thermal expansion phenomenon. The results of this study are inconsistent with a vacancy migration pore growth mechanism proposed earlier.