Title:
The reactant gas shroud or frame sheath for suspension plasma spray coating processes
Document Type and Number:
Japanese Patent JP6165771
Kind Code:
B2
Abstract:
A system and method for producing thermal spray coatings on a substrate from a liquid suspension is disclosed. The disclosed system and method include a thermal spray torch for generating a plasma and a liquid suspension delivery subsystem for delivering a flow of liquid suspension with sub-micron particles to the plasma to produce a plasma effluent. The liquid suspension delivery subsystem comprises an injector or nozzle which can produce a reactive gas shroud surrounding the plasma effluent. A flame envelope can also be used to isolate injection of the liquid suspension. The shroud or flame envelope can retain the sub-micron particles entrained within the plasma effluent and substantially prevent entrainment of ambient gases into the plasma effluent. The liquid suspension delivery subsystem can be arranged as an axial injection system, a radial internal injection system or an external radial injection system.
Inventors:
Petrack, Christopher A.
Remen, Don Jay.
Hoarstein, Albert
Louis the third, Thomas F.
Remen, Don Jay.
Hoarstein, Albert
Louis the third, Thomas F.
Application Number:
JP2014547500A
Publication Date:
July 19, 2017
Filing Date:
December 14, 2012
Export Citation:
Assignee:
Praxair ST Technology, Inc.
International Classes:
C23C4/12; B05B7/22; B05D1/02; B05D3/04
Foreign References:
| WO2008121173A1 | ||||
| US6106903 | ||||
| US5372857 | ||||
| US20030049384 |
Attorney, Agent or Firm:
Asamura patent office