| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated tool coated with a zirconium-containing aluminum oxide film, having improved film hardness, toughness and chipping resistance by improving the mechanical strength of anαaluminum oxide film. SOLUTION: The coated tool comprises a zirconium-containing aluminum oxide layer applied on a tool base. The zirconium-containing aluminum oxide layer contains theαaluminum oxide film and a zirconium compound. Theαaluminum oxide crystal particles of the zirconium-containing aluminum oxide layer grow vertically long in the direction of a generally film thickness. The zirconium compound exists to bridge gaps among theαaluminum oxide crystal particles. The zirconium compound is characterized in that Nx>Oz where the nitrogen content is Nx in mass% and the oxygen content is Oz. COPYRIGHT: (C)2010,JPO&INPIT
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