US 11,858,856 B2
Polycrystalline diamond and method for manufacturing same, scribe tool, scribe wheel, dresser, rotating tool, wire drawing die, cutting tool, electrode, and processing method using polycrystalline diamond
Kazuhiro Ikeda, Itami (JP); Keiko Arimoto, Itami (JP); Katsuko Yamamoto, Itami (JP); and Hitoshi Sumiya, Itami (JP)
Assigned to Sumitomo Electric Industries, Ltd., Osaka (JP)
Appl. No. 16/346,459
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Nov. 29, 2017, PCT No. PCT/JP2017/042856
§ 371(c)(1), (2) Date Apr. 30, 2019,
PCT Pub. No. WO2018/101346, PCT Pub. Date Jun. 7, 2018.
Claims priority of application No. 2016-232355 (JP), filed on Nov. 30, 2016.
Prior Publication US 2019/0300439 A1, Oct. 3, 2019
Int. Cl. C04B 35/52 (2006.01); B01J 3/06 (2006.01); B23B 27/20 (2006.01); C04B 41/87 (2006.01); B23B 27/14 (2006.01); C01B 32/25 (2017.01); C23C 16/26 (2006.01); C01B 32/205 (2017.01); C30B 29/04 (2006.01); C04B 35/528 (2006.01); C25B 11/043 (2021.01)
CPC C04B 35/52 (2013.01) [B01J 3/06 (2013.01); B01J 3/062 (2013.01); B23B 27/14 (2013.01); B23B 27/20 (2013.01); C01B 32/205 (2017.08); C01B 32/25 (2017.08); C04B 35/528 (2013.01); C04B 41/87 (2013.01); C23C 16/26 (2013.01); C25B 11/043 (2021.01); C30B 29/04 (2013.01); B01J 2203/061 (2013.01); B01J 2203/0655 (2013.01); C04B 2235/421 (2013.01); C04B 2235/427 (2013.01); C04B 2235/781 (2013.01); C04B 2235/963 (2013.01)] 34 Claims
OG exemplary drawing
 
1. Polycrystalline diamond having a diamond single phase as basic composition, wherein
the polycrystalline diamond includes a plurality of crystal grains,
the polycrystalline diamond contains boron, hydrogen, oxygen, and a remainder containing carbon and trace impurities,
the boron is dispersed in the crystal grains at an atomic level, and greater than or equal to 90 atomic % of the boron is present in an isolated substitutional type,
the hydrogen and the oxygen are present in an isolated substitutional type or an interstitial type in the crystal grains,
each of the crystal grains has a grain size of less than or equal to 500 nm, and
the polycrystalline diamond has a surface covered with a protective film,
wherein the protective film is a graphene nanoribbon film.