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:
Jul. 30, 2019
Filed:
May. 04, 2017
General Electric Company, Schenectady, NY (US);
Anthony Yu-Chung Ku, Rexford, NY (US);
Xi Yang, Mason, OH (US);
Tao Li, Cincinnati, OH (US);
John Patrick Pollinger, Niskayuna, NY (US);
Zachary Kenneth Mowry, Beavercreek, OH (US);
Frederic Joseph Klug, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Methods for forming ceramic cores are disclosed. A ceramic core formed using the method of the present application includes a silica depletion zone encapsulating an inner zone. The inner zone includes mullite and the silica depletion zone includes alumina. The method includes heat-treating a ceramic body in a non-oxidizing atmospheric condition for an effective temperature and time combination at a pressure less than 10atmosphere to form the silica depletion zone at a surface of the ceramic core.