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:
Jun. 21, 2016
Filed:
Nov. 01, 2013
Praxair S.t. Technology, Inc., North Haven, CT (US);
Thomas Alan Taylor, Indianapolis, IN (US);
Danny Lee Appleby, Indianapolis, IN (US);
Albert Feuerstein, Carmel, IN (US);
Ann Bolcavage, Indianapolis, IN (US);
Neil Hitchman, Carmel, IN (US);
James Munroe, Crawfordsville, IN (US);
Praxair S.T. Technology, Inc., North Haven, CT (US);
Abstract
This invention relates to high purity yttria or ytterbia stabilized zirconia powders comprising from about 0 to about 0.15 weight percent impurity oxides, from about 0 to about 2 weight percent hafnium oxide (hafnia), from about 6 to about 25 weight percent yttrium oxide (yttria) or from about 10 to about 36 weight percent ytterbium oxide (ytterbia), and the balance zirconium oxide (zirconia). Thermal barrier coatings for protecting a component such as blades, vanes and seal surfaces of gas turbine engines, made from the high purity yttria or ytterbia stabilized zirconia powders, have a density greater than 88% of the theoretical density with a plurality of verticalzA macrocracks homogeneously dispersed throughout the coating to improve its thermal fatigue resistance.