Patent ID: 6660371
Filing Date: 2003-12-09
Classification: C23C,Y10T

Abstract:
A composite material in the form of a substrate body selected from the group which consists of hard metal and cermet having a coating formed by at least one layer and having a coating thickness of 0.5 &mgr;m to 25 &mgr;m, the coating including a three-phase layer containing an Al2O3 phase and a second phase selected from the group which consists of ZrO2, HfO2 and mixtures of ZrO2 and HfO2, and a third finely dispersed phase embedded in said three-phase layer consisting of at least one compound selected from the group which consists of an oxide, oxycarbide, oxynitride and oxycarbonitride of titanium, and the third finely dispersed phase consisting of individual crystallites of a size which is smaller than 1/100 of the crystallite size of the Al2O3 phase and the second phase.