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Composite sintered material and tool using same
A composite sintered material includes: cubic boron nitride grains; and hexagonal boron nitride grains or the hexagonal boron nitride grains and wurtzite type boron nitride grains, wherein a dislocation density of the cubic boron nitride grains is more than or equal to 1×1015/m2 and less than or equal to 1×1017/m2, a median diameter d50 of equivalent circle diameters of the cubic boron nitride grains is more than or equal to 10 nm and less than or equal to 500 nm, and a relationship of the following expression 1 is satisfied:0.015≤(Vh+Vw)/(Vc+Vh+Vw)≤0.5, Expression 1:where Vc represents a volume-based content ratio of the cubic boron nitride grains, Vh represents a volume-based content ratio of the hexagonal boron nitride grains, and Vw represents a volume-based content ratio of the wurtzite type boron nitride grains.
Composite sintered material and tool using same
A composite sintered material includes: cubic boron nitride grains; and hexagonal boron nitride grains or the hexagonal boron nitride grains and wurtzite type boron nitride grains, wherein a dislocation density of the cubic boron nitride grains is more than or equal to 1×1015/m2 and less than or equal to 1×1017/m2, a median diameter d50 of equivalent circle diameters of the cubic boron nitride grains is more than or equal to 10 nm and less than or equal to 500 nm, and a relationship of the following expression 1 is satisfied:0.015≤(Vh+Vw)/(Vc+Vh+Vw)≤0.5, Expression 1:where Vc represents a volume-based content ratio of the cubic boron nitride grains, Vh represents a volume-based content ratio of the hexagonal boron nitride grains, and Vw represents a volume-based content ratio of the wurtzite type boron nitride grains.
Composite sintered material and tool using same
ISHIDA YUH (author) / KUKINO SATORU (author) / MATSUKAWA MICHIKO (author)
2022-05-03
Patent
Electronic Resource
English
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