Characteristics of CVD Hard Face Coatings
The Chemical Vapor Deposition process (CVD) is one of considerable complexity. This paper shows that in order to carry out meaningful quality control and development, sophisticated equipment is required. The problems and effects of CVD coating of carbides, nitrides and oxides on cemented carbide substrates are discussed principally with the aid of the Scanning Electron Microscope.
By an understanding of the physical properties of the coating and their microstructural requirements, an example of development work at ISCAR LTD on an improved alumina complex coating is described.
KeywordsChemica1 Vapor Deposition Titanium Carbide Titanium Nitride Alumina Coating Carbon Diffusion
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