Chemical Vapor Deposition. A coating deposition process that is characterized by a chemical reaction producing the desired film material. CVD processes are usually performed in vacuum, but not always. Vacuum CVD processes generally are not performed in high vacuum conditions (as used in PVD processes). Many CVD processes are performed at elevated temperatures. Hard coatings such as TiC, TiN, and TiCN are CVD- coated above the tempering temperature of steels and require a re-heat treat step after coating. BryCoat provides CVD deposition of TiC for bearing balls.