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. 04, 1980
Filed:
Apr. 16, 1979
Andrew C Grant, Amherst, NY (US);
James W Kern, North Tonawanda, NY (US);
Union Carbide Corporation, New York, NY (US);
Abstract
A method for producing a porous boiling surface with exceptional adhesion qualities and mechanical strength while at the same time maintaining the high degree of open cell porosity required for effective boiling heat transfer wherein a bond coating of pure aluminum is produced using a thermospray gun to melt an aluminum wire and impinge the molten aluminum particles against the metallic substrate in an inert gas stream projected from the gun nozzle located between 2 and 4 inches from the substrate. The bond coating has a porosity of less than 15 percent and a thickness not greater than 4 mils. The nozzle to substrate distance is then increased to 4 to 10 inches and a top coating of pure aluminum is formed having a porosity greater than 18 percent and a thickness of at least four times the thickness of the bond coating.