<p>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.</p>
申请公布号
EP1200200(B1)
申请公布日期
2004.04.07
申请号
EP20000944815
申请日期
2000.06.22
申请人
DELPHI TECHNOLOGIES, INC.
发明人
VAN STEENKISTE, THOMAS, H.;SMITH, JOHN, R.;TEETS, RICHARD, E.;MOLESKI, JEROME, J.;GORKIEWICZ, DANIEL, W.