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. 22, 2011
Filed:
Feb. 07, 2007
Thomas A. Taylor, Indianapolis, IN (US);
Thomas A. Taylor, Indianapolis, IN (US);
Praxair S.T. Technology, Inc., North Haven, CT (US);
Abstract
This invention relates to low thermal expansion bondcoats for thermal barrier coatings. The bondcoats comprise: (i) an inner layer comprising an inner layer alloy of MCrAlM', and (ii) an outer layer comprising an outer layer alloy of MCrAlM′, wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M′ is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof. The inner layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 50 microns. The outer layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 30 microns to about 100 microns. The bondcoat has a thermal expansion of about 6.5 millimeters per meter or less between a temperature of from about 25° C. to about 525° C.