Polycrystalline diamond body/silicon nitride substrate composite

Details Polycrystalline diamond body/silicon nitride substrate composite Polycrystalline diamond body/silicon nitride substrate composite

1979-03-12

1980-11-18

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of silicon containing

428411, 75201, 75205, 75214, 75226, 51295, 51307, 51308, 51309, B32B 904

Patent

active

042346614

ABSTRACT:
A mass of diamond crystals in contact with a mass of eutectiferous silicon-rich alloy and a silicon nitride ceramic substrate are disposed in a container and placed within a pressure transmitting powder medium. Pressure is applied to the powder medium resulting in substantially isostatic pressure being applied to the container and its contents sufficient to dimensionally stabilize the container and its contents. The resulting shaped substantially isostatic system of powder-enveloped container is hot-pressed whereby fluid eutectiferous silicon-rich alloy is produced and infiltrated through the interstices between the diamond crystals and contacts the contacting face of the silicon nitride substrate sufficiently producing, upon cooling, an adherently bonded integral composite.

REFERENCES:
patent: 3269815 (1966-08-01), Koopman
patent: 3743489 (1973-07-01), Wentorf et al.
patent: 3841852 (1974-10-01), Wilder et al.
patent: 3852078 (1974-12-01), Wakatsuki et al.
patent: 3912500 (1975-10-01), Vereschagin et al.
patent: 3913280 (1975-10-01), Hall
patent: 3944398 (1976-03-01), Bell
patent: 3982911 (1976-09-01), Lee
patent: 4042346 (1977-08-01), Sioui et al.
patent: 4110084 (1978-08-01), Lee et al.
patent: 4142689 (1979-03-01), Vereschagin et al.

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