| abstract |
The invention relates to a composite material made of a coated hard metal or cermet base body and a method for its production on which the single layer or, in the case of a multilayer coating, at least one 0.5 μm to 25 μm thick layer is an Al¶2¶O¶3¶ and contains a phase consisting of ZrO¶2¶ and / or HfO¶2¶. According to the invention, a third finely dispersive phase is to be embedded in this Al¶2¶O¶3¶ / ZrO¶2¶ and / or HfO¶2¶ layer, which consists of an oxide, oxicarbide, oxynitride or oxicarbonitride of titanium. For this purpose, a CVD process is used at deposition temperatures between 900 ° C. and 1000 ° C. in the gas phase under pressures of 10 to 100,000 Pa, the gas phase in addition to the gases required for the deposition 0.2 to 5 mol% TiCl¶4¶ contains. |