Title:
超硬質構造体及びその製造方法
Document Type and Number:
Japanese Patent JP2014506297
Kind Code:
A
Abstract:
A superhard structure comprises a body of polycrystalline superhard material comprising a first region and a second region, the second region being adjacent an exposed surface of the superhard structure, the second region comprising a diamond material or cubic boron nitride, the density of the second region being greater than 3.4×103 kilograms per cubic metre when the second region comprises diamond material. The material(s) forming the first and second regions have a difference in coefficient of thermal expansion, the first and second regions being arranged such that this difference induces compression in the second region adjacent the exposed surface. The first/a further region has the highest coefficient of thermal expansion of the polycrystalline body and is separated from a peripheral free surface of the body of polycrystalline superhard material by the second region or one or more further regions formed of a material or materials of a lower coefficient of thermal expansion. The regions comprise a plurality of grains of polycrystalline superhard material. There is also disclosed a method of making such a material.
Inventors:
Mosa, Mahomed, Adia
Jeffrey, John, Davis
David, Christian, Bows
Jeffrey, John, Davis
David, Christian, Bows
Application Number:
JP2013546664A
Publication Date:
March 13, 2014
Filing Date:
December 20, 2011
Export Citation:
Assignee:
ELEMENT SIX ABRASIVES S.A.
International Classes:
B22F7/00; B23B27/14; B23B27/20; B23B51/00; B23C5/16; C22C26/00; C22C29/08
Attorney, Agent or Firm:
Hirohito Katsunuma
Takeshi Sekine
Kazuma Kojima
Takeshi Sekine
Kazuma Kojima