Yttria Stabilized Zirconia

CT1700-1

CT1700-1 is an Yttria Stabilized Zirconium Oxide coating applied using the Plasma process. The coating is typically applied over a hot corrosion resistant bond layer of a specialized alloy called MCrAlY. The density of the CT1700-1 may be varied depending on the plasma parameters used. This is important in order to tailor the coating to a fairly wide range of operating conditions. The coatings provide thermal shock protection to the substrate as well as providing a high level of thermal insulation. These coatings are used in some of the most severe thermal resistance applications there are in gas turbines and rockets.

Typical Properties

Nominal Composition:
92% ZrO2/8% Y2O3
Bond Strength:
1,900 – 2,100 psi
Coating Porosity:
5-15%
Coating Hardness:
Rc 40-45
As-sprayed Surface Roughness
300-350 Ra

For the Following Applications:

CT1700-1 is used for severe service conditions that include thermal shock and high-temperature resistance. Coatings of CT1700-1 are the coatings of choice for many aero turbines, and land based gas turbine blades, vanes, combustion liners, transition pieces, combustion tiles and other detail components used to construct the combustion sections of most modern land based gas turbines and many aero engines.

Thermal conductivity characteristics of the sprayed coating can be estimated as follows:

1.0 – 1.1  Watts/m • K

Finishing

Finish CT1700-1 is not typically finished although it may be ground using diamond wheels. This coating is sometimes tumbled to improve surface finish.

Specifications

CTS-1700-1 meets the following specifications: