Patent ID: 8939706
Filing Date: 2015-01-27
Classification: C23C,F01D,F05D

Abstract:
1. A turbine abradable component, comprising: a support surface for coupling to a turbine casing; a thermally sprayed ceramic/metallic abradable substrate coupled to the support surface, having a substrate surface adapted for orientation proximal a rotating turbine blade tip circumferential swept path; an elongated first ridge projecting from the substrate surface across a majority of the circumferential swept path, having a pair of first opposed lateral walls terminating in a continuous surface plateau having a plateau height relative to the abradable substrate surface, the plateau defining a planform cross sectional width and length; a plurality of second ridges projecting from the plateau, having spacing, planform cross sections, height and groove dimensions selected so that the second ridges have less shear resistance than the first ridge.