Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...
Patent
1993-04-08
1995-08-01
Roy, Upendra
Cleaning and liquid contact with solids
Processes
Including application of electrical radiant or wave energy...
427524, 427526, 216 87, 216101, B08B 312
Patent
active
054377293
ABSTRACT:
A method for tailoring or patterning the surface of ceramic articles is provided by implanting ions to predetermined depth into the ceramic material at a selected surface location with the ions being implanted at a fluence and energy adequate to damage the lattice structure of the ceramic material for bi-axially straining near-surface regions of the ceramic material to the predetermined depth. The resulting metastable near-surface regions of the ceramic material are then contacted with energy pulses from collapsing, ultrasonically-generated cavitation bubbles in a liquid medium for removing to a selected depth the ion-damaged near-surface regions containing the bi-axially strained lattice structure from the ceramic body. Additional patterning of the selected surface location on the ceramic body is provided by implanting a high fluence of high-energy, relatively-light ions at selected surface sites for relaxing the bi-axial strain in the near-surface regions defined by these sites and thereby preventing the removal of such ion-implanted sites by the energy pulses from the collapsing ultrasonic cavitation bubbles.
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Boatner Lynn A.
Rankin Janet
Romana Laurence J.
Thevenard Paul
Adams Harold W.
Chaudhry Saeed
Larcher Earl L.
Martin Marietta Energy Systems Inc.
Roy Upendra
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