Thermostable polycrystalline diamond body, method and mold for p

Details Thermostable polycrystalline diamond body, method and mold for p Thermostable polycrystalline diamond body, method and mold for p

1984-12-14

1987-02-17

Hayes, Lorenzo B.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51308, B24B 100

Patent

active

046437410

ABSTRACT:
A thermostable polycrystalline diamond body is produced by pre-treating the diamond crystals with molten base or salt, mixing the pre-treated diamond crystals with silicon powder or a blend of silicon and one or more substances, subjecting the mixture to a combination of high-pressure and high-temperature and maintaining the pressure and temperature for a period of time. The thermostable polycrystalline diamond body is characterized in having diamond crystals uniformly distributed in the body. The diamond crystals are covered by .beta.-silicon carbide and that the diamond crystals together with .beta.-silicon carbide form an uninterrupted framework throughout the entire body, the interstices of which are filled with elemental silicon or silicon-containing refractory phases. A polygonal graphite mold having walls of equal thickness useful in the production of said thermostable polycrystalline diamond body is also provided.

REFERENCES:
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patent: 3520667 (1970-07-01), Taylor
patent: 3684004 (1972-08-01), Germain et al.
patent: 3911994 (1975-10-01), Truman
patent: 4171339 (1979-10-01), Lee et al.
patent: 4469655 (1984-09-01), Kiss

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