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公开(公告)号：EP2127789A1
公开(公告)日：2009-12-02
申请号：EP08703423.7
申请日：2008-01-18
发明人： SUMIYA, Hitoshi , OBATA, Kazushi , YOSHINAGA, Miki
CPC分类号： B01J3/062 , B01J2203/061 , B01J2203/062 , B01J2203/0655 , B01J2203/068 , B01J2203/0685 , B23B27/20 , B23B2226/315 , B82Y30/00 , C01B32/25 , C01P2002/60 , C04B35/52 , C04B35/645 , C04B2235/422 , C04B2235/425 , C04B2235/427 , C04B2235/5288 , C04B2235/5292 , C04B2235/5436 , C04B2235/5445 , C04B2235/5454 , C04B2235/656 , C04B2235/781 , C04B2235/783 , C04B2235/785 , C04B2235/96 , C04B2235/963
摘要： One object of the present invention is to provide a cutting tool excellent in strength and wear resistance. The cutting tool has a cutting blade formed using a highly hard diamond polycrystalline body made substantially only of diamond and produced by directly converting a raw material composition including a non-diamond type carbon material into diamond and sintering the diamond at an ultra high pressure and an ultra high temperature without adding a sintering aid or a catalyst, the polycrystalline body having a mixed construction including fine-grained diamond crystals with a maximum grain size of less than or equal to 100 nm and an average grain size of less than or equal to 50 nm and plate-like or particulate coarse-grained diamond crystals with a minimum grain size of greater than or equal to 50 nm and a maximum grain size of less than or equal to 10000 nm.
摘要翻译： 本发明的一个目的是提供一种强度和耐磨性优异的切削工具。 切割工具具有使用基本上仅由金刚石制成的高硬度金刚石多晶体形成的切割刀片，其通过将包含非金刚石型碳材料的原料组合物直接转化为金刚石并以超高压烧结金刚石， 超高温而不添加烧结助剂或催化剂，所述多晶体具有混合结构，所述混合结构包括最大粒度小于或等于100nm的细晶粒金刚石晶体和平均晶粒尺寸小于或等于50 nm和具有大于或等于50nm的最小晶粒尺寸和小于或等于10000nm的最大晶粒尺寸的板状或颗粒状粗粒金刚石晶体。
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12.发明公开
公开(公告)号：EP4431906A1
公开(公告)日：2024-09-18
申请号：EP22892488.2
申请日：2022-10-13
发明人： SUMIYA, Hitoshi , LEE, Jin Hwa
IPC分类号： G01N3/56
CPC分类号： G01N3/56
摘要： A ring-shaped contact comprising a multi-crystal diamond formed from a plurality of diamond particles, said contact being formed in a manner such that the axis of rotation passes through the center thereof, and being equipped with a first section which includes an inside end section and has a constant thickness in the radial direction, and a second section which includes an outside end section and has a thickness which decreases in the radial direction, wherein: the second section has a first surface which is contiguous with the upper surface of the first section, a second surface which is contiguous with the bottom surface of the first section, and a connecting surface which connects the first surface and the second surface and includes the outside end section; the angle θ formed between a first line segment describing the first surface and a second line segment describing the second surface in a cross-section along the axis of rotation is 100-150°, inclusive; the length between a first boundary section, which is the boundary between the first surface and the connecting surface, and a second boundary section, which is the boundary between the second surface and the connecting surface, is 1-10µm, inclusive; the length from the axis of rotation to the outside end section is 0.5-5mm, inclusive; and the average particle diameter of the plurality of diamond particles is 10-300nm, inclusive.
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公开(公告)号：EP4317544A1
公开(公告)日：2024-02-07
申请号：EP22780934.0
申请日：2022-03-29
发明人： NISHIBAYASHI, Yoshiki , ZUO, Yikang , LEE, Jin Hwa , TERAMOTO, Minori , KOBAYASHI, Yutaka , SUMIYA, Hitoshi
摘要： A single-crystal diamond including: a growth striation parallel to a main growth surface; and a low-index crystal plane, wherein the growth striation in at least part of the single-crystal diamond has an off-cut angle with respect to the low-index crystal plane.
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14.发明公开
公开(公告)号：EP3862336A1
公开(公告)日：2021-08-11
申请号：EP18906709.3
申请日：2018-10-01
发明人： SUMIYA, Hitoshi , YAMAMOTO, Katsuko
摘要： A diamond polycrystal includes diamond grains, the diamond polycrystal including a cubic diamond and a 6H type hexagonal diamond, wherein the cubic diamond and the 6H type hexagonal diamond exist in the same or different diamond grains, and a ratio Ab 1 /Ab 2 is more than or equal to 0.4 and less than or equal to 1, Ab 1 representing a maximum value of absorption in a range of more than or equal to 1200 cm -1 and less than or equal to 1300 cm -1 in an infrared absorption spectrum, Ab 2 representing a maximum value of absorption in a range of more than or equal to 1900 cm -1 and less than or equal to 2100 cm -1 .
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公开(公告)号：EP3825294A1
公开(公告)日：2021-05-26
申请号：EP18847210.4
申请日：2018-07-20
发明人： SUMIYA, Hitoshi , YAMAMOTO, Katsuko
摘要： In a diamond polycrystal, a value of a ratio (a'/a) of a' to a is less than or equal to 0.99 in a Knoop hardness test performed under a condition defined in JIS Z 2251:2009, where the a represents a length of a longer diagonal line of a first Knoop indentation formed in a surface of the diamond polycrystal when a Knoop indenter with a test load of 4.9 N is pressed onto the surface of the diamond polycrystal, and the a' represents a length of a longer diagonal line of a second Knoop indentation remaining in the surface of the diamond polycrystal after releasing the test load.
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公开(公告)号：EP3805156A1
公开(公告)日：2021-04-14
申请号：EP20204082.0
申请日：2012-07-26
摘要： Polycrystalline diamond, comprising: carbon; a group III element and/or a group V element added to be dispersed in said carbon at an atomic level; and an inevitable impurity, the polycrystalline diamond having a crystal grain size not greater than 500 nm.
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公开(公告)号：EP3763689A1
公开(公告)日：2021-01-13
申请号：EP20187772.7
申请日：2016-10-07
发明人： SUMIYA, Hitoshi , SATO, Takeshi
IPC分类号： C04B35/645 , C04B35/528 , C09K3/14 , C01B32/26 , B26D1/00
摘要： A composite polycrystal comprising: polycrystalline diamond formed of diamond grains that are directly bonded mutually, and non-diamond carbon dispersed in said polycrystalline diamond, wherein the composite polycrystal has a concentration of contained hydrogen of less than or equal to 1000 ppm, and said diamond grains forming said polycrystalline diamond have a mean grain size of greater than or equal to 10 nm and less than or equal to 500 nm.
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公开(公告)号：EP2868780B1
公开(公告)日：2020-11-04
申请号：EP13809060.0
申请日：2013-06-27
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公开(公告)号：EP3712304A1
公开(公告)日：2020-09-23
申请号：EP18877495.4
申请日：2018-11-13
摘要： A diamond polycrystal is a diamond polycrystal basically composed of a diamond single phase, wherein the diamond polycrystal is composed of a plurality of diamond grains having an average grain size of less than or equal to 30 nm, and the diamond polycrystal has a carbon dangling bond density of more than or equal to 10 ppm.
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公开(公告)号：EP3181736B1
公开(公告)日：2019-07-03
申请号：EP15831844.4
申请日：2015-08-10
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