| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas turbine blade for power generation having a thermal barrier coating formed by a thermal spraying method without loss of a function of a diffusion barrier layer.SOLUTION: A gas turbine blade for power generation is used which includes a blade substrate formed with a single-crystal heat-resistant alloy including C: 0.06 to 0.08%, B: 0.016 to 0.035%, Hf: 0.2 to 0.3%, Cr: 6.9 to 7.3%, Mo: 0.7 to 1.0%, W: 7.0 to 9.0%, Re: 1.2 to 1.6%, Ta: 8.5 to 9.5%, Nb: 0.6 to 1.0%, Al: 4.9 to 5.2%, Co: 0.8 to 1.2%, and the remainder substantially consisting of Ni in weight basis, and includes a diffusion barrier layer, a metal layer, a bond coat, and a top coat, stacked in order from a blade substrate side on a surface of the blade substrate, the metal layer having a thickness of 5 to 30 μm. |
