Method for producing the polycrystalline diamond tool

Details Method for producing the polycrystalline diamond tool Method for producing the polycrystalline diamond tool

1992-03-20

1992-12-22

Beck, Shrive

Abrasive tool making process, material, or composition

Miscellaneous

51295, 51308, 51309, B24D 500

Patent

active

051730898

ABSTRACT:
The invention relates to a chemical vapor phase deposition method for producing a polycrystalline diamond tool comprising the steps of supplying material gas including a carbon-containing gas and hydrogen gas into a vacuum chamber, exciting the material gas into a state including plasma or radicals, introducing the material gas to a heated substrate, first depositing of diamond on the substrate with the material gas having a first density of carbon, a first density of oxygen and a first density of nitrogen, second depositing of diamond on the first deposited diamond with the material gas having a density of carbon higher than the first density of carbon, a density of oxygen lower than the first density of oxygen or a density of nitrogen higher than the first density of nitrogen till the diamond becomes more than 40 .mu.m in thickness, etching the substrate away from the deposited diamond by an etchant to obtain a diamond plate, metalizing the surface of the diamond plate which was grown in the second depositing step, and fixing the metalized surface on an end surface of a tool body to thereby obtain a diamond tool with a rake surface which was grown in the first depositing step and with a fixation surface which was grown in the second depositing step.

REFERENCES:
patent: 4690691 (1987-09-01), Komanduri
patent: 4738689 (1988-04-01), Gigi et al.
patent: 4776861 (1988-10-01), Frushour
patent: 4954139 (1990-09-01), Cerutti

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