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:
May. 29, 2012
Filed:
Dec. 03, 2010
Liangde Xie, Pearl River, NY (US);
Mitchell Dorfman, Smithtown, NY (US);
Richard Schmid, Gerlikon, CH;
Jacobus C. Doesburg, Edmonton, CA;
Matthew Gold, Farmingdale, NY (US);
Liangde Xie, Pearl River, NY (US);
Mitchell Dorfman, Smithtown, NY (US);
Richard Schmid, Gerlikon, CH;
Jacobus C. Doesburg, Edmonton, CA;
Matthew Gold, Farmingdale, NY (US);
Sulzer Metco (US) Inc., Westbury, NY (US);
Abstract
The invention is directed to a material and method for obtaining a ceramic abradable system for high temperature applications. High purity partially stabilized zirconia and/or hafnia base material has higher sintering resistance compared to conventional 6-9 weight percent yttria stabilized zirconia systems. The benefits of these systems are higher service lifetime and low thermal conductivity to achieve high operating temperatures. System includes a superalloy substrate, oxidation resistant bond coat and a thick ceramic abradable top coat. Total coating thickness is about 0.5-5 mm. In some applications an intermediate layer of high purity partially stabilized zirconia or a partially stabilized YSZ/MCrAlY cermet is applied over the oxidation resistant bond coat. In other applications an abradable system is applied on top of a grid. Additional benefits should be reduced blade wear at high operating conditions.