Abrasive tool making process – material – or composition – With inorganic material
Patent
1978-04-17
1980-01-01
Arnold, Donald J.
Abrasive tool making process, material, or composition
With inorganic material
51309, 264319, 423446, B24D 302
Patent
active
041815050
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.
REFERENCES:
patent: 3136615 (1964-06-01), Bovenkerk et al.
patent: 3141746 (1964-07-01), De Lai
patent: 3407445 (1968-10-01), Strong
patent: 3423177 (1969-01-01), Bovenkerk
patent: 3574580 (1971-04-01), Stromberg et al.
patent: 3767371 (1973-10-01), Wentorf et al.
Bundy Francis P.
De Vries Robert C.
Wentorf, Jr. Robert H.
Arnold Donald J.
Binkowski Jane M.
Cohen Joseph T.
General Electric Company
MaLossi Leo I.
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