Preparation and performance of rGO coating on C/C composite finger seal with femtosecond laser

摘要

In order to improve the oxidation resistance of a carbon/carbon (C/C) composite finger seal in high-temperature environments, a high-repetition frequency femtosecond laser was used to prepare a graphene coating on the surface of the C/C composite finger seal by reducing the graphene oxide (GO). The experimental results indicate that the multilayer reduced graphene oxide (rGO) formed has a gauze-like morphology and good transparency. The rGO coating with stable chemical properties effectively covers the surface fibers of the C/C composites and fills the pores, which enhances the compactness of the matrix and improves the high-temperature oxidation resistance of the C/C composite finger seal. This process method might improve the service life and reliability of components made of C/C composites under high-temperature environments.