| 摘要 |
Coated hard metal or cermet composite material has an aluminum oxide and zirconium and/or hafnium oxide layer containing finely dispersed titanium oxide, oxycarbide, oxy nitride or oxy carbonitride. A coated hard metal or cermet composite material has a 0.5-25 microns thick coating layer which comprises an Al2O3 phase and a ZrO2 and/or HfO2 phase and which forms a single layer coating or one of the layers, preferably the outermost layer, of a multilayer coating, this layer also containing a finely dispersed third phase of titanium oxide, oxycarbide, oxy nitride or oxy carbonitride. An Independent claim is also included for production of a layer containing Al2O3 and ZrO2 phases by CVD at 900-1000 deg C from a gas phase which contains 0.2-5 mol% TiCl4 in addition to gases selected from AlCl3, ZrCl4, HfCl4, CO2, H2, CH4 and N2 or inert gases. |
