The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1980
Filed:
Apr. 17, 1978
Robert C De Vries, Burnt Hills, NY (US);
Francis P Bundy, Alplaus, NY (US);
Robert H Wentorf, Jr, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Extensive development of deformation bands in diamond crystals results from subjecting diamond material properly 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 be made to occur at temperatures as low as 900.degree. 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.