| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated tool coated with a zirconium containing aluminum oxide film, having improved high speed cutting performance, toughness and chipping resistance by improving the mechanical strength of anα-type aluminum oxide film. SOLUTION: The coated tool comprises anα-type aluminum oxide layer applied on a tool base, and a zirconium containing aluminum oxide layer applied right thereon. The zirconium containing aluminum oxide layer containsα-type aluminum oxide and zirconium oxide. Between theα-type aluminum oxide layer and the zirconium containing aluminum oxide layer,α-type aluminum oxide crystal particles range over. Theα-type aluminum oxide crystal particles of the zirconium containing aluminum oxide layer grow vertically long in the direction of an approximately film thickness. The zirconium oxide exists to bridge gaps among theα-type aluminum oxide crystal particles. COPYRIGHT: (C)2009,JPO&INPIT
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