Method for producing polycrystalline diamond aggregates of prede

Details Method for producing polycrystalline diamond aggregates of prede Method for producing polycrystalline diamond aggregates of prede

1972-12-27

1976-04-06

Meros, Edward J.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

51307, B01J 306, C01B 3106

Patent

active

039490629

ABSTRACT:
A workpiece made of a non-diamond carbonaceous material and having dimensions exceeding those of a polycrystalline diamond aggregate by a contraction coefficient value of the non-diamond material during its transformation into a polycrystalline diamond material, is enclosed with a powder-like catalyst having particle dimensions less than the minimum dimensions of the workpiece, subjected to a pressure of at least 80 kb, and heated by a pulse of electric current for a period of 0.1 to 10 seconds sufficient for the formation of said polycrystalline aggregate.

REFERENCES:
patent: 2947610 (1960-08-01), Hall et al.
patent: 3334968 (1967-08-01), Ishizuka
patent: 3407445 (1968-10-01), Strong
patent: 3576602 (1971-04-01), Kuratomi
Bundy, "J. Chemical Physics," Vol. 38, No. 3, 1963, pp. 631-643.

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