Patent ID: 8080312

Claim:
A coated body comprising: a substrate and a coating scheme on the substrate wherein the coating scheme comprises: a titanium carbonitride coating layer containing titanium carbonitride grains, and the titanium carbonitride coating layer being applied by chemical vapor deposition for a selected duration so as to terminate the growth of the titanium carbonitride grains at a pre- selected grain size, and the thickness of the titanium carbonitride coating layer ranging between a lower limit equal to about 0.5 micrometers and an upper limit equal to about 25 micrometers; a first titanium/aluminum-containing coating layer containing first titanium/aluminum-containing grains, and the first titanium/aluminum-containing coating layer being applied by chemical vapor deposition for a selected duration so as to terminate the growth of the first titanium/aluminum-containing grains at a pre-selected grain size, and the thickness of the first titanium/aluminum-containing coating layer ranging between a lower limit equal to greater than zero micrometers and an upper limit equal to about 5 micrometers, and the first aluminum/titanium-containing coating layer being farther from the substrate than the titanium carbonitride coating layer; an alpha alumina coating layer containing alpha alumina grains, and the alpha alumina coating layer being applied by chemical vapor deposition for a selected duration so as to terminate the growth of the alpha alumina grains at a pre-selected grain size, and the thickness of the alpha alumina coating layer ranging between a lower limit equal to greater than zero micrometers and an upper limit equal to about 5 micrometers, and the alpha alumina coating layer being farther away from the substrate than the first aluminum/titanium- containing coating layer, and wherein the first titanium/aluminum-containing coating layer and the alpha alumina coating layer comprising a coating sequence, and the coating scheme comprising a plurality of the coating sequences.