Synthesis and Tribology of Carbide-Derived Carbon Films
Summary
Carbide-derived carbon (CDC) films are produced at atmospheric pressure on the surfaces of carbide-based ceramic materials and coatings by a high-temperature chlorination process. These nanoporous carbon films contain carbon nano-onions and amorphous carbon, and may contain nanocrystalline diamond and graphite as well, depending on the synthesis conditions. This chapter presents the results of a comprehensive study on the tribological behavior of these films. Carbide-derived carbon (CDC) is a novel nano-structured material that holds promise for numerous industrial applications such as catalysis, hydrogen storage, molecular sieves, rolling, rotating, and sliding tribological systems. It is produced on the surfaces of metal carbides such as SiC and TiC by a high-temperature chlorination process at atmospheric pressure. Specifically, the carbide-forming element is selectively etched out in a halogen-containing carrier gas at temperatures ranging from 600°C to 1200°C.