POLYCRYSTALLINE CUBIC BORON NITRIDE AND PRODUCTION METHOD THEREFOR

Title:

POLYCRYSTALLINE CUBIC BORON NITRIDE AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/175644

Kind Code:

A9

Abstract:

Polycrystalline cubic boron nitride containing at least 96 vol% cubic boron nitride, wherein the dislocation density of the cubic boron nitride is greater than 8×1015/m2, the polycrystalline cubic boron nitride includes multiple crystal grains, and the median diameter d50 of the equivalent circle diameters of the multiple crystal grains is less than 100 nm.

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Inventors:

MATSUKAWA MICHIKO (JP)
KUKINO SATORU (JP)
HIGASHI TAISUKE (JP)
ABE MACHIKO (JP)

Application Number:

PCT/JP2020/008151

Publication Date:

November 12, 2020

Filing Date:

February 27, 2020

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Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP (JP)

International Classes:

C04B35/5831; B23B27/14; B23B27/20; B23B51/00; B23C5/16; B23P15/28; C04B35/645

Attorney, Agent or Firm:

FUKAMI PATENT OFFICE, P.C. (JP)

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