Thermal barrier coating material and method for production thereof, gas turbine member using the thermal barrier coating material, and gas turbine
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsTaiji Torigoe, Kazutaka Mori, Ikuo Okada, Sunao Aoki, Kouji Takahashi, Minoru Ohara, Takehiko Hirata, Hideaki Kaneko
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Abstract
A thermal barrier coating material, containing a metal binding layer laminated on a base material and 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.
Claims20
A method for producing a thermal barrier coating material comprising:
- 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.
A method for producing a thermal barrier coating (TBC) raw material for thermal spraying, comprising 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 μm, and then heating at 1300 to 1600° C. for 1 to 10 hours.
Dependencies are inferred from the claim text.