NONMAGNETIC OR FEEBLE MAGNETISM DIAMOND SINTERED BODY AND METHOD OF MANUFACTURING THE SAME

Title:

NONMAGNETIC OR FEEBLE MAGNETISM DIAMOND SINTERED BODY AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/1995/033862

Kind Code:

A1

Abstract:

This invention aims at providing a nonmagnetic or feeble magnetism diamond sintered body which can be used for a magnetized product and a magnetic material. This object is achieved by a nonmagnetic or feeble magnetism diamond sintered body the magnetic susceptibility of which is not more than 3 % of that of Fe, characterized in that this sintered body comprises a high-hardness sintered body containing not less than 50 vol.% of diamond of a grain size of 0.1-100 'mu'm, a binder phase of the diamond sintered body having a metal component selected from the group comprising ferromagnetic iron family metals, such as Ni, Co and Fe and a mixture thereof, 1-50 vol.% of binder phase of not less than one kind of feeble magnetism metal component having a magnetic susceptibility of not more than 5x10-6(emu/g), such as Cr, V, Cu, Si, Zn, Al, No and W being solid dissolved in the previously-mentioned metal component, whereby the magnetic moment of the diamond sintered body having a binder phase the main components of which are iron family metals is reduced by not less than 80 %.

Inventors:

WAKABAYASHI TAKAYOSHI (JP)
YAMAMURA AKIHIKO (JP)

Application Number:

PCT/JP1995/001089

Publication Date:

December 14, 1995

Filing Date:

June 02, 1995

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)
WAKABAYASHI TAKAYOSHI (JP)
YAMAMURA AKIHIKO (JP)

International Classes:

B01J3/06; C22C26/00; C22C38/00; H01F1/00; H01F1/03; (IPC1-7): C22C26/00; B22F7/00; C04B35/52

Foreign References:

JPS6283447A	1987-04-16
JPS62274034A	1987-11-28

Other References: