Protective coatings for metals by chemical vapour deposition

AbstractIn this review the protection of metals using coatings produced by chemical vapour deposition (CVD) is discussed, and the general principles and techniques of the various unified CVD processes are examined. Some aspects of fundamental studies associated with the deposition process are reviewed. The adhesion of coatings is discussed in detail, with the emphasis on the coating/substrate system and the factors which affect the adhesion of coatings. A survey is presented of the available or developed CVD coating systems which are likely to be relevant to protective coatings for metals. This is followed by a review of the applications of some CVD coatings for a variety of operating environments where, for example, protection is required against wear, erosion, corrosion, and high-temperature oxidation. The unique characteristics of CVD are discussed and its advantages and disadvantages are then considered in the light of these unique characteristics. Finally, an assessment is made of the present situati...