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CSM- Coanda-Assisted Spray Manipulation

Utah State University is seeking companies interested in commercializing a novel device to improve the application of thermal sprays to irregular surfaces and inside pipes and bores while protecting the surface from heat. Thermal spray coatings extend the life of products in a wide variety of industries, including aerospace, turbine engines, diesel engines, oil, electronics, textile, automotive, pump, marine, printing, gage, machine repair, and process. The market for thermal spray powders and equipment is nearly $1 billion and nearly $2.5 billion including thermal spray applicators.
Features and Benefits
  • Coating deposition for internal diameters
  • Coating deposition for complex geometries
  • Thermal energy control during plasma spray processing
  • CSM modifies and controls spray flow direction and shape, allowing thermal sprays to be applied to difficult to reach areas
  • The device can move the flame, mitigating undesirable heating in thermal sprays, leading to reduced thermal damage in the final product
  • NiCrAlY and zirconia powders can be vectored to greater than 10 degrees
  • No coating degradation attributed to CSM vectoring, decreasing quality control issues
Coanda-Assisted Spray Manipulation (CSM) is a technique that utilizes a control flow to vector a high-speed jet or spray at high frequency. Energetic plasmas can be easily vectored and controlled with the appropriate CSM control flow. The control flow can be applied at any circumferential position, thus the direction of a plasma jet can be precisely oriented. CSM has the ability to enhance thermal spray processes.
Development Stage
The CSM concept has been proven with a commercial plasma spray gun. Preliminary CSM tests using a Praxair SG-100 plasma spray gun have been preformed and show promising results.
US Patent 7,757,966
Glenn Whichard
Senior Commercialization Associate
Physical Sciences
(435) 797-9604
Reference: W05036


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