Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 7, 2020
Patent Application Number
15496839
Date Filed
April 25, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
A gas turbine engine includes a circumferential row of blades, with the blades having respective blade tips. A seal is disposed about the blades. The seal has an abradable layer which the tips of the blades, at times, rub against when the blades rotate. The rubbing produces a maximum temperature at the abradable layer. The abradable layer includes a metal matrix and microballoons dispersed in the metal matrix. The microballoons are formed of a glass that has a glass transition temperature that is approximately 50° F. to 300° F. greater than the maximum temperature.
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