Turbine Blade

A turbine blade comprising:

• at least one cooling passage that is formed in the blade and extends in a blade height direction,
• wherein blade surfaces on a suction side and a pressure side are covered with thermal barrier coating,
• wherein a design point on the suction side is set on the blade surface on the suction side in each blade section perpendicular to the blade height direction within a range from a position on a back side of and including a throat position, at which a distance between turbine blades is the global minimum, to a position in front of and not including a position of a tailing end of a final cooling passage that is the closest to a blade trailing edge in the at least one cooling passage, and
• wherein thickness distribution of the thermal barrier coating on the suction side of each blade section is configured such that a thickness of the thermal barrier coating is uniform from a blade leading edge to the design point and gradually reduces from the design point toward the back side up to the blade trailing edge.