Claims
- 1. A diamond workpiece with a tubular configuration which varies in three dimensions comprised of a homogeneous self supporting single layer of polycrystalline CVD diamond having a grain size of less than 1 .mu.m and a thickness in the range of 150 to 2000 .mu.m wherein said single layer of polycrystalline diamond has no Raman signature at 1332 cm.sup.-1.
- 2. A diamond workpiece as in claim 1 selected from the group consisting of a high pressure water jet mixing tube, a high pressure water jet nozzle, and a high pressure air/abrasive jet nozzle.
- 3. A high pressure water jet nozzle as in claim 2, said water jet nozzle having an interior surface defining an aperture, said surface having an inner edge around said aperture wherein said inner edge of the nozzle being polished to provide a radius of curvature of 1-3 .mu.m and having an included angle is within 3 degrees of a 90.degree. angle.
- 4. A high pressure water jet nozzle as in claim 3, wherein the aperture is not out of round by more than 0.2% subsequent to polishing.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 07/897,124, filed Jun. 11, 1992 now abandoned, entitled "SMOOTH SURFACE CVD DIAMOND FILMS AND METHOD FOR PRODUCING SAME", assigned to the same assignee as the present invention.
US Referenced Citations (12)
Non-Patent Literature Citations (1)
Entry |
K. Maruyama et al., Synthesis of Hexagonal Diamond in a Hydrogen Plasma Jet, Journal of Materials Science Letters 11 1992 (no month), pp. 116-118. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
897124 |
Jun 1992 |
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