Patent ID: 6284356
Filing Date: 2001-09-04
Classification: C23C,Y10T

Abstract:
An aluminum oxide coated tool member which comprises a substrate, an intermediate layer containing aluminum, titanium, oxygen and carbon as essential elements and which is provided on the substrate and an outer layer disposed over said intermediate layer, whereinsaid outer layer comprises aluminum oxide, andsaid intermediate layer comprises at least one of:a single-phase layer of a composite carboxide containing titanium and aluminum,a complex-phase layer having dispersed therein at least two components selected from the group consisting of titanium carbide, titanium nitride, titanium oxide, titanium carbonitride, titanium carboxide, titanium nitroxide, titanium carbonitroxide, aluminum oxide, aluminum nitride, aluminum nitroxide, aluminum carboxide, aluminum oxynitrocarbide, a composite nitride containing titanium and aluminum, a composite oxide containing titanium and aluminum, a composite carboxide containing titanium and aluminum, a composite nitroxide containing titanium and aluminum, and a composite carbonitroxide containing titanium and aluminum, provided that the combination consisting of titanium nitride, aluminum nitride is excluded, anda laminated layer containing at least said single-phase layer and said complex-phase layer.