AIRFOIL WITH GEOMETRICALLY SEGMENTED COATING SECTION HAVING MECHANICAL SECONDARY BONDING FEATURE

An airfoil includes an airfoil body that has a geometrically segmented coating section. The geometrically segmented coating section includes a wall (172) that has an outer side. The outer side includes an array of cells (74) and there is a coating disposed in the array of cells (74). The cells (74) include respective secondary mechanical bonding features (184) that secure the coating to the wall (172).