METHOD FOR PRODUCING DIAMOND POLYCRYSTAL, DIAMOND POLYCRYSTAL, CUTTING TOOL, WEAR-RESISTANT TOOL, AND GRINDING TOOL

Title:

METHOD FOR PRODUCING DIAMOND POLYCRYSTAL, DIAMOND POLYCRYSTAL, CUTTING TOOL, WEAR-RESISTANT TOOL, AND GRINDING TOOL

Document Type and Number:

WIPO Patent Application WO/2018/066319

Kind Code:

A9

Abstract:

This method for producing a diamond polycrystal comprises: a first step for subjecting a high-pressure-phase carbon powder to a heat treatment at 1300°C or higher to thereby obtain a heat-treated carbon powder; and a second step for sintering the heat-treated carbon powder under a condition of from 12 GPa to 25 GPa and from 1200°C to 2300°C to thereby obtain a diamond polycrystal.

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Inventors:

ISHIDA YUH (JP)
SUMIYA HITOSHI (JP)

Application Number:

PCT/JP2017/032795

Publication Date:

July 19, 2018

Filing Date:

September 12, 2017

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

C04B35/52; B23B27/14; B23B27/20; B23B51/00; B23C5/16; B23D77/00; B23F21/00; B23G5/06; B24D3/00; C01B32/26

Attorney, Agent or Firm:

FUKAMI PATENT OFFICE, P.C. (JP)

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