Small particle plasma spray apparatus, method and coated article

Details Small particle plasma spray apparatus, method and coated article Small particle plasma spray apparatus, method and coated article

1996-05-31

1998-04-28

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912148, 21912151, 219 7616, B23K 1000

Patent

active

057447772

ABSTRACT:
A method of coating a surface using a plasma arc torch comprises directing a plasma plume externally from a discharge end of the plasma torch toward the surface, positioning a powder injector proximate the plasma plume to introduce ceramic oxide powder particles at a size less than 20 microns diameter into an outer mantle of the plasma plume so that the powder particles are confined in the outer mantle, directing first and second gas jets at the plasma plume downstream of the powder injector position and on opposite sides of the plasma plume to enhance entrainment of the injected powder particles in the outer mantle, circulating the powder particles in the outer mantle of the plasma plume for a residence time to heat the powder particles to melt them without substantial vaporization, and depositing the melted powder on the surface as a dense coating having closed porosity.

REFERENCES:
patent: 3304402 (1967-02-01), Thorpe
patent: 3591759 (1971-07-01), Stand
patent: 3676637 (1972-07-01), Stand
patent: 3684911 (1972-08-01), Perugini et al.
patent: 3914573 (1975-10-01), Muehlberger
patent: 3935418 (1976-01-01), Stand et al.
patent: 4104505 (1978-08-01), Rayment et al.
patent: 4370538 (1983-01-01), Browning
patent: 4964568 (1990-10-01), Rotolico et al.
patent: 5013883 (1991-05-01), Fuimefreddo et al.
patent: 5340023 (1994-08-01), Itoh et al.

Affiliated with

Also associated with

Rating

Small particle plasma spray apparatus, method and coated article does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Small particle plasma spray apparatus, method and coated article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small particle plasma spray apparatus, method and coated article will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1534378