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:
Mar. 09, 2004
Filed:
Nov. 20, 2002
Applicant:
Inventors:
Neville C. Whittle, Pittsburgh, PA (US);
Roger W. Kaufold, Pittsburgh, PA (US);
Jamal Righi, Grand Rapids, MI (US);
Joseph P. Harenski, Export, PA (US);
Assignee:
Alcoa Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/566 ; B28B 7/36 ; B28B 7/38 ; B32B 1/504 ; B05D 1/36 ;
U.S. Cl.
CPC ...
C04B 3/566 ; B28B 7/36 ; B28B 7/38 ; B32B 1/504 ; B05D 1/36 ;
Abstract
A coating for a mold surface of a casting mold includes a metallic bond coat bonded to the mold surface and having a continuous, uniform thickness of between about 0.002 to 0.005 inch on the mold surface. A topcoat of yttria stabilized zirconia is located on top of the metallic bond coat and has a continuous, uniform thickness of between about 0.005 to 0.030 inch. The topcoat has a porosity between 5-15%. The topcoat has a surface layer having a thickness of between about 0.001 to 0.002 inch and a porosity of less than 1%.