Coating processes – Solid particles or fibers applied – Uniting particles to form continuous coating with...
Patent
1999-06-29
2000-10-31
Parker, Fred J.
Coating processes
Solid particles or fibers applied
Uniting particles to form continuous coating with...
427189, 427192, 427195, B05D 112
Patent
active
061399132
ABSTRACT:
A method and apparatus is disclosed for kinetic spray coating of substrate surfaces by impingement of air or gas entrained powders of small particles in a range up to at least 106 microns accelerated to supersonic velocity in a spray nozzle. Preferably powders of metals, alloys, polymers and mixtures thereof or with semiconductors or ceramics are entrained in unheated air and passed through an injection tube into a larger flow of heated air for mixing and acceleration through a supersonic nozzle for coating of an article by impingement of the yieldable particles. A preferred apparatus includes a high pressure air supply carrying entrained particles exceeding 50 microns through an injection tube into heated air in a mixing chamber for mixing and acceleration in the nozzle. The mixing chamber is supplied with high pressure heated air through a main air passage having an area ratio relative to the injection tube of at least 80/1.
REFERENCES:
patent: 3100724 (1963-08-01), Rocheville
patent: 5302414 (1994-04-01), Alkhimov et al.
patent: 5795626 (1998-08-01), Gabel et al.
patent: B15302414 (1997-02-01), Alkhimov et al.
Surface & Coatings Technology III (1999) 62-71, entitled "Kinetic Spray Coatings" by T. H. Van Steenkiste et al.
Gorkiewicz Daniel W.
Moleski Jerome J.
Smith John R.
Teets Richard E.
Van Steenkiste Thomas H.
National Center for Manufacturing Sciences
Parker Fred J.
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