Turbine shroud honeycomb matrix mechanical locking structure and method

A shroud for a turbine engine or the like comprising an arcuate base member having a convex side with a convex surface and a concave side with a concave surface including means for securing the shroud to a turbine engine casing, a six-walled, two ended cell, honeycomb structure secured to the base on the concave side thereof, a matrix of abradable material within the honeycomb structure, and mechanical locking means operable between the honeycomb structure and abradable matrix material for securing the abradable matrix material within the honeycomb structure including portions of at least some of the walls of the cells being deformed transversely only between and in spaced relation to the ends of the cells so as to extend into the cells and comprising split and deformed portions of walls of the cells extending into the abradable matrix material wherein the split and deformed portions of the honeycomb structure are deformed in a diamond configuration with the center of the diamond configuration split substantially parallel to the concave surface of the base and the upper and lower portions of the diamond shaped deformed portion of the honeycomb material extend in opposite directions into adjacent cells with their maximum deformation appearing at the split center of the diamond configuration.