US 2019/0119172 A1 · COATING STRUCTURE, TURBINE PART HAVING SAME, AND METHOD FOR MANUFACTURING COATING STRUCTURE

Abstract

Provided are a coating structure, a turbine part having the same, and a method for manufacturing the coating structure. The coating structure is provided on a surface of a base portion including a ceramic matrix composite. The coating structure is layered on the surface of the base portion, and includes a bond coat layer formed of a rare-earth silicate and a top coat layer layered on the bond coat layer. The residual stress present in the bond coat layer is compressive residual stress. The oxygen permeability coefficient of the bond coat layer is no greater than 10−9 kg·m−1·s−1 at a temperature of not lower than 1200° C. and a higher oxygen partial pressure of not less than 0.02 MPa. The bond coat layer may contain carbonitride particles or carbonitride whiskers.

Claims14

Dependent claims

A coating structure provided on a surface of a base portion including a ceramic matrix composite comprising:

a bond coat layer formed of a rare-earth silicate, the bond coat layer layered on the surface of the base portion;
and
a top coat layer layered on the bond coat layer,
wherein the bond coat layer has a compressive residue stress as a residual stress, and an oxygen permeability coefficient of not greater than 10−9 Kg·m−1·s−1 at not lower than 1200° C. and a higher oxygen partial pressure of not less than 0.02 MPa.

1 more element

Dependencies are inferred from the claim text.

Coating structure, turbine part having same, and method for manufacturing coating structure

Life of this patent

Coating structure, turbine part having same, and method for manufacturing coating structure

Life of this patent

Abstract

Claims14