Feedback enhanced plasma spray tool
An improved automatic feedback control scheme enhances plasma spraying of powdered material through reduction of process variability and providing better ability to engineer coating structure. The present inventors discovered that controlling centroid position of the spatial distribution along with other output parameters, such as particle temperature, particle velocity, and molten mass flux rate, vastly increases control over the sprayed coating structure, including vertical and horizontal cracks, voids, and porosity. It also allows improved control over graded layers or compositionally varying layers of material, reduces variations, including variation in coating thickness, and allows increasing deposition rate. Various measurement and system control schemes are provided.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC07-99ID13727
- Assignee:
- Cyber Materials LLC (Auburndale, MA)
- Patent Number(s):
- 6,967,304
- Application Number:
- 10/423,237
- OSTI ID:
- 1175558
- Country of Publication:
- United States
- Language:
- English
Wiley Encyclopedia of Electrical and Electronics Engineering
Process Control
|
book | December 1999 |
Plasma spray processes: diagnostics and control?
|
journal | October 1999 |
Diagnostics and control in the thermal spray process
|
journal | September 2001 |
In-flight particle surface temperature measurement: Influence of the plasma light scattered by the particles
|
journal | September 1993 |
Rapid solidification and microstructure development during plasma spray deposition
|
journal | December 1996 |
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