Sintered compact and cutting tool
AssigneesSumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
InventorsMayu Danda, Katsumi Okamura, Satoru Kukino
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Abstract
A sintered compact has a first material, a second material, and a third material. The first material is cubic boron nitride. The second material is a compound including zirconium. The third material is an aluminum oxide and the aluminum oxide includes a fine-particle aluminum oxide. The sintered compact has a first region in which not less than 5 volume % and not more than 50 volume % of the fine-particle aluminum oxide is dispersed in the second material. On arbitrary straight lines in the first region, an average value of continuous distances occupied by the fine-particle aluminum oxide is not more than 0.08 μm and a standard deviation of the continuous distances occupied by the fine-particle aluminum oxide is not more than 0.1 μm.
Claims8
A sintered compact comprising a first material, a second material, and a third material,
- the first material being cubic boron nitride,
- the second material being a compound including zirconium,
- the third material being an aluminum oxide,
- the aluminum oxide including a fine-particle aluminum oxide,
- the sintered compact having a first region in which not less than 5 volume % and not more than 50 volume % of the fine-particle aluminum oxide is dispersed in the second material,
- on arbitrary straight lines in the first region, an average value of continuous distances occupied by the fine-particle aluminum oxide being not more than 0.08 μm and a standard deviation of the continuous distances occupied by the fine-particle aluminum oxide being not more than 0.1 μm.
Dependencies are inferred from the claim text.