High Density Cobalt Nickel Chromium Aluminum Yttrium (CoNiCrAlY)
CT5216-2
CT5216-2 a Cobalt, Nickel, Chromium, Aluminum, Yttrium coating used as a bond layer under thermal barrier coatings and as a stand alone coating to resist hot gases in gas turbine engines. The material exhibits excellent resistance to sulfidation.
Typical Properties
Nominal Composition:
32% NI, 21% CR, 8% AL, .5% Y
Bond Strength:
10,000 PSI
Coating Porosity:
Less than 2%
Coating Hardness:
DPH300 300
For the Following Applications:
CT5216-2 is used in applications such as land based gas turbine blade airfoil surfaces, and bond coats under yttria stabilized zirconia thermal barriers. It is often overcoated with aluminides to improve resistance to hot gases, although it is also used without aluminide, depending on the application.
Finishing
CT5216-2 is not often finished except by tumbling to reach specific finish requirements on blades.
Specifications
CT-5216-2 meets the following specifications: