TBC attachment construction for a cooled turbine airfoil and method of forming a TBC covered airfoil

摘要

A TBC covered substrate, such as an airfoil used in a gas turbine engine, the substrate has a plurality of open cells formed thereon with the cell walls being formed by ribs arranged to form substantially rectangular shaped cells. The walls or ribs or the cells have cross-over holes formed at about the mid-point of the cell wall and a wire band is passed through the cross-over holes and extends through the cells. A TBC is sprayed into the cells to fill the cell and cover the wire band such that the wire band functions to reinforce the TBC. The cell floors include at least one cooling air feed hole and the TBC is a porous material such that cooling air passing through the feed holes will also pass through the TBC. During the process of forming the airfoil with the TBC covered, air is passed through the feed holes while the TBC is being applied to prevent the feed holes from being blocked by the TBC.