Black/grey chromium carbon nitride coatings were deposited by means of unbalanced magnetron sputtering of chromium in a argon-nitrogen-acetylene gas mixture. The coatings were produced in an industrial sized batch reactor, a Flexicoat 1200 system from Hauzer Techno Coating. The stress induced adhesive failure and the color of black/grey chromium carbon nitride coatings has been investigated as a function of several process parameters. The coatings change from grey to black as the nitrogen-acetylene flow is increased. By increasing the nitrogen-acetylene flow the risk of stress induced adhesive failure increases. Stress induced adhesive failure can be prevented by appropriate changes in the process settings.
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