- Patent Title: Polycrystalline diamond and manufacturing method thereof, scribe tool, scribing wheel, dresser, rotating tool, orifice for water jet, wiredrawing die, cutting tool, and electron emission source
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Application No.: US14235763Application Date: 2012-07-26
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Publication No.: US09714197B2Publication Date: 2017-07-25
- Inventor: Kazuhiro Ikeda , Keiko Arimoto , Katsuko Yamamoto , Hitoshi Sumiya , Takeshi Sato
- Applicant: Kazuhiro Ikeda , Keiko Arimoto , Katsuko Yamamoto , Hitoshi Sumiya , Takeshi Sato
- Applicant Address: JP Osaka-shi
- Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee Address: JP Osaka-shi
- Agency: Venable LLP
- Agent Michael A. Sartori; F. Brock Riggs
- Priority: JP2011-165747 20110728; JP2011-165748 20110728; JP2011-165749 20110728
- International Application: PCT/JP2012/068932 WO 20120726
- International Announcement: WO2013/015348 WO 20130131
- Main IPC: B24D3/00
- IPC: B24D3/00 ; B24D11/00 ; B24D18/00 ; B24D3/02 ; C09K3/14 ; C04B35/52 ; C01B31/06 ; B01J3/06
Abstract:
Nano polycrystalline diamond is composed of carbon, an element of different type which is an element other than carbon and is added to be dispersed in carbon at an atomic level, and an inevitable impurity. The polycrystalline diamond has a crystal grain size not greater than 500 nm. The polycrystalline diamond can be fabricated by subjecting graphite in which the element of different type which is an element other than carbon has been added to be dispersed in carbon at an atomic level to heat treatment within high-pressure press equipment.
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