Thermal barrier coating system, components coated therewith and method for applying a thermal barrier coating system to components

A method of making a thermal barrier coating system comprising:

• applying a bond coat layer to a component of metal;
• applying a first ceramic layer onto the bond coat layer in at least one step, the first ceramic layer including at least one material selected from the group consisting of:
• yttria-stabilized zirconia with a yttria content in a range of 6-8 wt-%,
• YTaO4 doped zirconia, and
• titania doped zirconia;
• and
• applying a second ceramic layer onto the first ceramic layer in at least one step, the second ceramic layer including at least one material selected from the group consisting of:
• YTaO4 doped zirconia,
• titania doped zirconia,
• scandia stabilized zirconia,
• ceria containing perovskite material,
• yttrium aluminium garnet material,
• Monazite material, and
• spinel material,
• wherein the material of the second ceramic layer is different from the material of the first ceramic layer.

A component of a gas turbine, comprising:

• a metal base material;
• and
• a thermal barrier coating system including:
• a bond coat layer having a lower face in direct contact with the base material and an upper face;
• a first ceramic layer in direct contact with the upper face of the bond coating layer, the first ceramic layer including at least one material selected from the group consisting of:
• yttria-stabilized zirconia with a yttria content in a range of 6-8 wt-%,
• YTaO4 doped zirconia, and
• titania doped zirconia;
• and
• a second ceramic layer disposed at an outermost hot gas exposed surface of the coating system, the second ceramic layer including at least one material selected from the group consisting of:
• YTaO4 doped zirconia,
• titania doped zirconia,
• scandia stabilized zirconia,
• ceria containing perovskite material,
• yttrium aluminium garnet material,
• Monazite material, and
• spinel material,
• wherein the material of the second ceramic layer is different from the material of the first ceramic layer.