Stator seal for rotor blade tip rub avoidance

摘要

A stator seal for a turbine assembly includes a seal base 12 securable to a turbine stator and including an annular inner surface, and an abradable coating 14 disposed on the annular inner surface. The abradable coating 14 and the annular inner surface have a predefined cross-sectional profile including a transient operation section 16 that facilitates axial expansion and a steady state operation section 18 that facilitates a tighter clearance. Corresponding method of making a stator seal for a turbine assembly.