| abstract |
A method of making a coated cutting insert, as well as the coated cutting insert, includes a step of providing a substrate having a surface and depositing a titanium oxycarbonitride CVD coating layer. The gas mixture from which the coating layer of titanium oxycarbonitride is deposited has a composition of nitrogen, methane, hydrogen chloride, titanium tetrachloride, acetonitrile, carbon monoxide and hydrogen. The titanium oxycarbonitride coating layer comprises titanium oxycarbonitride whiskers having in a two-dimensional plan view an average length greater than about 1.0 μm, a mean width greater than about 0.2 μm, and an average aspect ratio greater than about 2.0. |