초록 ▼

A thermal barrier coating for superalloy turbine engine vanes and blades that are exposed to high temperature gas is disclosed. The coating includes an Aluminide or MCrAlY layer, an alumina layer, and a ceramic top layer. The ceramic layer has a columnar grain microstructure. A bond inhibitor is dis

A thermal barrier coating for superalloy turbine engine vanes and blades that are exposed to high temperature gas is disclosed. The coating includes an Aluminide or MCrAlY layer, an alumina layer, and a ceramic top layer. The ceramic layer has a columnar grain microstructure. A bond inhibitor is disposed in the gaps between the columnar grains. This inhibitor is either unstabilized zirconia, unstabilized hafnia, or a mixture thereof.

대표청구항 ▼

A superalloy article having a ceramic thermal barrier coating on at least a portion of its surface, comprising: a superalloy substrate; a bond coat overlying the substrate and selected from the group consisting of aluminides and MCrAlY where M is a metal selected from the group consisting of iron, c

A superalloy article having a ceramic thermal barrier coating on at least a portion of its surface, comprising: a superalloy substrate; a bond coat overlying the substrate and selected from the group consisting of aluminides and MCrAlY where M is a metal selected from the group consisting of iron, cobalt, nickel, and mixture thereof; a stabilized ceramic coat overlying the bond coat and having an outer surface, the stabilized ceramic coat having a microstructure characterized by a plurality of micron sized gaps extending from the outer surface towards the bond coat; and an unstabilized ceramic bond inhibitor disposed in substantially all of the gaps for inhibiting bonding between the stabilized ceramic across said gaps.