Surface modification of polymers and carbon-based materials by ion implantation and oxidative conversion

摘要

This invention provides an improved process for surface modification of polymers, graphites and carbon-based composite materials, and improved surface-modified materials produced by the process. The preferred surface modification process of the present invention comprises the steps of: high dose single or multiple implantation of the substrate with energetic ions, including ions of at least one metal or semi-metal element able to form a stable, non-volatile oxide; and oxidative full or partial conversion of an upper portion of the implanted layer to a continuous, resistant oxide-enriched surface layer. The process may also comprise the additional implantation of a hardening non-metal element to participate in the formation of a glass-like surface layer or to form a carbonized, hardened sub-layer. Surface modified materials of the present invention have substantially improved resistance to erosion by atomic oxygen and to thermal cycling, as well as improved resistance to UV/air, improved surface hardness and wear resistance, tailored optical properties and altered surface energy, making them potentially useful in aerospace as well as other industries.