Title:
ダイヤモンド多結晶体およびその製造方法
Document Type and Number:
Japanese Patent JP5720686
Kind Code:
B2
Abstract:
Polycrystalline diamond includes cubic diamond and hexagonal diamond, and a ratio of X-ray diffraction peak intensity of a (100) plane of the hexagonal diamond to X-ray diffraction peak intensity for a (111) plane of cubic diamond is not lower than 0.01 %. In addition, a present method of manufacturing polycrystalline diamond includes the steps of preparing a non-diamond carbon material having a degree of graphitization not higher than 0.58 and directly converting the non-diamond carbon material to cubic diamond and hexagonal diamond and sintering the non-diamond carbon material, without adding any of a sintering agent and a binder, under pressure and temperature conditions at which diamond is thermodynamically stable.
Inventors:
Hitoshi Kakutani
Katsuko Yamamoto
Takeshi Sato
Arimoto Keiko
Katsuko Yamamoto
Takeshi Sato
Arimoto Keiko
Application Number:
JP2012529575A
Publication Date:
May 20, 2015
Filing Date:
August 10, 2011
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C01B31/06; B23B27/14; B23B27/20; B23B51/00; B23C5/16; B24D3/00; B31B50/25
Domestic Patent References:
| JP2009067610A | 2009-04-02 | |||
| JP2009007248A | 2009-01-15 | |||
| JP2009067609A | 2009-04-02 | |||
| JP2007055819A | 2007-03-08 | |||
| JP2004131336A | 2004-04-30 | |||
| JP2009067610A | 2009-04-02 | |||
| JP2009007248A | 2009-01-15 | |||
| JP2009067609A | 2009-04-02 | |||
| JP2007055819A | 2007-03-08 | |||
| JP2004131336A | 2004-04-30 |
Foreign References:
| WO2007011019A1 | 2007-01-25 | |||
| WO2006048957A1 | 2006-05-11 | |||
| WO2007011019A1 | 2007-01-25 | |||
| WO2006048957A1 | 2006-05-11 |
Attorney, Agent or Firm:
Fukami patent office