Low‐Temperature Chemical Vapor Deposition Tungsten Carbide Coatings for Wear/Erosion Resistance

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Abstract
A new chemical vapor deposition (CVD) process has been developed to deposit hard coatings, containing tungsten carbide, at temperatures below 500°C. These coatings, which have been applied to both ferrous and nonferrous alloys, exhibit excellent resistance to wear and erosion. The coatings comprise a mixture of tungsten and the tungsten carbide, the latter being present as W2C, W2C + W3C, or W3C. The coatings' composition and properties can be controlled by varying the CVD process parameters. The unique lamellar, fine‐grained microstructures of these coatings contribute to their good tribological properties.

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