Method of making superhard articles

Details Method of making superhard articles Method of making superhard articles

1976-08-16

1979-08-14

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

51309, 264325, 264332, C04B 3552

Patent

active

041645278

ABSTRACT:
The method of preparing superhard articles consists of placing a mixture of powdered hard-alloy matrix material and diamond grains into a hard-alloy envelope formed from a hard-alloy material, preferably of exactly the same composition as the hard-alloy matrix material of the mixture, with the thickness of the hard-alloy envelope over the entire area thereof exceeding by at least 3-4 times the maximum space between any two adjacent diamond grains within the mixture. The mixture in the envelope is then subjected to sintering in a free condition thereof, without any external mechanical loads being applied thereto.

REFERENCES:
patent: 3720740 (1973-03-01), Moto et al.
patent: 3871840 (1975-03-01), Wilder et al.

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