CUBIC BORON NITRIDE SINTERED COMPACT, COATED CUBIC BORON NITRIDE SINTERED COMPACT, METHOD FOR PRODUCING CUBIC BORON NITRIDE SINTERED COMPACT, AND METHOD FOR PRODUCING COATED CUBIC BORON NITRIDE SINTERED COMPACT

Title:

Document Type and Number:

WIPO Patent Application WO/2011/059020

Kind Code:

A1

Abstract:

Disclosed is a cubic boron nitride sintered compact which has excellent wear resistance. Specifically disclosed is a cubic boron nitride sintered compact which is characterized by containing about 30-70% by volume of cubic boron nitride with the balance made up of unavoidable impurities and a binder phase that is composed of at least one substance selected from among oxides, carbides, nitrides and borides of Ti, Al, Zr, Y, Ce, Mg and Ca and mutual solid solutions of the oxides, carbides, nitrides and borides. The cubic boron nitride sintered compact is characterized in that: α-Al2O3, ZrB2, ZrO2 and ZrO are contained therein; and when the X-ray diffraction intensity of the (110) plane of α-Al2O3 is represented by Ia, the X-ray diffraction intensity of the (101) plane of ZrB2 is represented by Izb and the X-ray diffraction intensity of the (111) plane of ZrO is represented by Izo, the ratio of Izb to Ia, namely (Izb/Ia) satisfies 0.13 ≤ (Izb/Ia) ≤ 0.30 and the ratio of Izo to Ia, namely (Izo/Ia) satisfies 0.05 ≤ (Izo/Ia) ≤ 0.20.

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Inventors:

YOKOSHI SHO

Application Number:

PCT/JP2010/070091

Publication Date:

May 19, 2011

Filing Date:

November 11, 2010

Export Citation:

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Assignee:

TUNGALOY CORP (JP)
YOKOSHI SHO

International Classes:

C04B35/583; B23B27/14; C04B41/87

Domestic Patent References:

WO2008087940A1	2008-07-24
WO2009116610A1	2009-09-24

Foreign References:

JP2005200227A	2005-07-28
JPS5858247A	1983-04-06
JPH0218310A	1990-01-22
JPH0551261A	1993-03-02
JPS632858A	1988-01-07
JPH0244067A	1990-02-14
JPH08109070A	1996-04-30

Other References: