The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2005
Filed:
Apr. 26, 2003
Michael Alan Gevelber, Newton, MA (US);
Donald Edward Wroblewski, Wellesley, MA (US);
James Russell Fincke, Los Alamos, NM (US);
William David Swank, Idaho Falls, ID (US);
Delon C. Haggard, Idaho Falls, ID (US);
Randy Lee Bewley, Blackfoot, ID (US);
Michael Alan Gevelber, Newton, MA (US);
Donald Edward Wroblewski, Wellesley, MA (US);
James Russell Fincke, Los Alamos, NM (US);
William David Swank, Idaho Falls, ID (US);
Delon C. Haggard, Idaho Falls, ID (US);
Randy Lee Bewley, Blackfoot, ID (US);
Cyber Materials LLC, Auburndale, MA (US);
Abstract
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.