Method for the work-hardening of diamonds

Details Method for the work-hardening of diamonds Method for the work-hardening of diamonds

B - Operations, Transporting

01

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57/23

B01J 3/06 (2006.01) C04B 41/00 (2006.01) C09K 3/14 (2006.01)

Patent

CA 1091938

METHOD FOR THE WORK-HARDENING OF DIAMONDS Abstract of the Disclosure Extensive development of deformation bands in diamond crystals results from subjecting diamond material pro- perly confined to reduce or eliminate brittle fracture thereof to the simultaneous application of high pressure and temperature in a defined region on the carbon phase diagram, the pressures and temperatures being incapable of bringing about significant crystal-to-crystal bonding of diamond, Plastic deformation resulting in work- hardening of these diamonds can he made to occur at temperatures as low as 900°C at pressures of about 60 kb. A work-hardened diamond for use in a single-point diamond tool would, for example, be prepared by embedding the diamond in diamond powder to fill the volume thereby inhibiting brittle fracture of the diamond being work- hardened.

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