Thermal barrier coating material method of production thereof, gas turbine member using the thermal barrier coating material, and gas turbine
First Claim
1. A thermal barrier coating material, comprising a metal binding layer laminated on a base material and a ceramic layer laminated on the metal binding layer, the ceramic layer comprising partially stabilized ZrO2 which is porous and has microcracks that extend in a thickness direction of the ceramic layer.
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Accused Products
Abstract
The invention relates to a thermal barrier coating material for coating a gas turbine member that provides a higher thermal barrier property and a higher peeling resistance. In a first aspect of the invention, a metal binding layer 22 and a porous ZrO2-based ceramic layer 23 are laminated successively on a base material 21, and microcracks that extend in the thickness direction are formed in the ceramic layer 23. After laminating the ceramic layer 23 on the metal binding layer 22 by thermal spraying, etc., microcracks 24 are formed by irradiating with a laser beam a surface of the ceramic layer 23 and thereby heating the surface of the ceramic layer 23 at 1000° C. to 1700° C., while cooling the rear surface of the base material 21. Thus, microcracks 24 are formed by a heating and cooling cycle.
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Citations
23 Claims
- 1. A thermal barrier coating material, comprising a metal binding layer laminated on a base material and a ceramic layer laminated on the metal binding layer, the ceramic layer comprising partially stabilized ZrO2 which is porous and has microcracks that extend in a thickness direction of the ceramic layer.
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6. A method for producing a thermal barrier coating material comprising the steps of:
- laminating a metal binding layer on a surface of a base material;
laminating a ceramic layer on a surface of the metal binding layer; and
forming microcracks that extend in a thickness direction in said ceramic layer by irradiating a surface of said ceramic layer with a laser beam and thereby heating the surface of said ceramic layer while cooling a rear surface of said base material. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
- laminating a metal binding layer on a surface of a base material;
- 14. A thermal barrier coating material, comprising a metal binding layer laminated on a base material and a ceramic layer laminated on the metal binding layer, the ceramic layer comprising partially stabilized ZrO2 which is partially stabilized by additives of Dy2O3 and Yb2O3.
- 20. A TBC raw material for thermal spraying, comprising a zirconia powder having a specific surface area of at least 10 m2/g and a rare earth oxide powder having a specific surface area of at least 10 m2/g.
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21. A method for producing a TBC raw material for thermal spraying, comprising steps of mixing a zirconia powder having a specific surface area of at least 10 m2/g and a rare earth oxide powder having a specific surface area of at least 10 m2/g along with a binder or dispersant so as to form a slurry, then granulating to form particles having a mean particle diameter of 10 to 100 μ
- m, and then heating at 1300 to 1600°
C. for 1 to 10 hours. - View Dependent Claims (23)
- m, and then heating at 1300 to 1600°
Specification