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公开(公告)号：US11434550B2
公开(公告)日：2022-09-06
申请号：US16967572
申请日：2019-12-27
发明人： Machiko Abe , Satoru Kukino , Michiko Matsukawa
IPC分类号： C22C29/16
摘要： A cubic boron nitride sintered material includes 40% by volume or more and 96% by volume or less of cubic boron nitride grains and 4% by volume or more and 60% by volume or less of a binder phase, and the cubic boron nitride grains have a dislocation density of less than 1×105/m2.
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公开(公告)号：US11186485B2
公开(公告)日：2021-11-30
申请号：US17052831
申请日：2020-02-27
发明人： Michiko Matsukawa , Satoru Kukino , Taisuke Higashi , Machiko Abe
IPC分类号： H01M4/02 , C01B21/064 , B23B27/20
摘要： A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of 8×1015/m2 or less, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.
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公开(公告)号：US11773030B2
公开(公告)日：2023-10-03
申请号：US18015298
申请日：2021-10-26
发明人： Keita Miyamoto , Satoru Kukino , Akihiko Ueda , Michiko Matsukawa
IPC分类号： C04B35/5831 , C04B35/628 , C04B41/00
CPC分类号： C04B35/5831 , C04B35/62836 , C04B35/62892 , C04B41/0072 , C04B2235/3804 , C04B2235/3865 , C04B2235/5436 , C04B2235/762
摘要： A cBN sintered material comprising cBN particles and a binder phase, in which the binder phase contains AlN and AlB2, a content proportion of cBN particles is 70 to 97 vol %, cBN sintered material has a volume resistivity up to 5×10−3 Ωcm, a rate of a peak intensity derived from Al with respect to a peak intensity derived from cBN particles is less than 1.0%, cBN particles include fine particles and coarse particles, coarse particles optionally include ultra-coarse particles, with respect to the entire cBN particles, a content proportion α of fine particles is from 10 vol %, a content proportion β of coarse particles is from 30 vol %, a content proportion γ of ultra-coarse particles is 25 vol % or less, and a total of the content proportion α of fine particles and the content proportion β of coarse particles is 50 to 100 vol %.
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公开(公告)号：US11208324B2
公开(公告)日：2021-12-28
申请号：US17052920
申请日：2020-02-27
发明人： Michiko Matsukawa , Satoru Kukino , Taisuke Higashi , Machiko Abe
IPC分类号： C01B21/064 , B23B27/14
摘要： A polycrystalline cubic boron nitride comprising 98.5% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of more than 8×1015/m2, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of 0.1 μm or more and 0.5 μm or less.
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公开(公告)号：US11319255B2
公开(公告)日：2022-05-03
申请号：US17280939
申请日：2020-03-18
发明人： Yuh Ishida , Satoru Kukino , Michiko Matsukawa
IPC分类号： C04B35/5831 , B23B27/14
摘要： 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.
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公开(公告)号：US11214522B2
公开(公告)日：2022-01-04
申请号：US17052855
申请日：2020-02-27
发明人： Michiko Matsukawa , Satoru Kukino , Taisuke Higashi , Machiko Abe
IPC分类号： C04B35/5831 , B23B27/18
摘要： A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of more than 8×1015/m2, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.
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公开(公告)号：US11161790B2
公开(公告)日：2021-11-02
申请号：US17254380
申请日：2019-12-16
发明人： Hironari Moroguchi , Michiko Matsukawa , Satoru Kukino , Akito Ishii , Katsumi Okamura , Machiko Abe , Kenta Sano
IPC分类号： C04B35/5831 , B23B27/14
摘要： A cubic boron nitride sintered material comprises 30% by volume or more and 80% by volume or less of cubic boron nitride grains and 20% by volume or more and 70% by volume or less of a binder phase, the cubic boron nitride grains having a dislocation density of 3×1017/m2 or more and 1×1020/m2 or less.
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