| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-resistant member such as a gas turbine hot part which has durability and reliability in the use under a corrosive environment with the use of the low-grade oil.SOLUTION: The heat resistant member includes an alloy substrate containing Ni, Co, or Fe as a principal component, and thermal barrier coating formed on the surface of the substrate via a bonding layer. The thermal barrier coating includes a porous thermal-barrier layer made of ceramic and an environmental barrier layer with corrosion resistance. An impregnated layer is provided between the environmental barrier layer and the thermal barrier layer. In the impregnated layer, the thermal barrier layer is impregnated with a part of the environmental barrier layer. In particular, the thermal barrier layer is made of a porous zirconia layer, and the environmental barrier layer includes silica as a principal component. The porous zirconia layer has pores impregnated with the part of the environmental barrier layer. As a result, the heat resistant member having excellent corrosion resistance and excellent heat resistance are attained. |
