Oxide coated cutting tool
2323 23 23 4According to the present invention there is provided a body at least partially coated with one or more refractory layers of which at least one layer essentially consist of α-AlO. Said α-AlOlayer consists of essentially equiaxed grains with an average grain size of <1 μm and with a bim...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
07.06.2005
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| Online Access | Get full text |
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| Summary: | 2323 23 23 4According to the present invention there is provided a body at least partially coated with one or more refractory layers of which at least one layer essentially consist of α-AlO. Said α-AlOlayer consists of essentially equiaxed grains with an average grain size of <1 μm and with a bimodal grain size distribution with coarser grains with an average grainsize in the interval 0.5-1 μm and finer grains with an average grainsize of <0.5 μm. The AlOlayer further contains striated zones containing titanium (>5 at %) but no nitrogen or carbon. This particular microstructure is obtained by temporarily stopping the gases needed for the growth of the AlOlayer and introducing TiCl. |
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