Ceramic Coating Conductivity

The ceramic topcoat is typically composed of yttria stabilized zirconia ysz which is desirable for having very low conductivity while remaining stable at nominal operating temperatures typically seen in applications.

Ceramic coating conductivity.

80 000 psi at rt. Eds develops nanostructured ceramic powders capable of being customized for unique properties and structures. Some oxide ceramics are used as conductors and semi conductors for specialized applications. Insoluble in hcl and hf.

Reacts with hot h2so4 and hno3. Conductive and non conductive coatings that generally incorporate such conductive fillers are used promote or limit the flow of heat or electrical current into or away from the object that is coated. Low thermal conductivity thermal barrier coatings tbcs are preferred as they can increase turbine engine efficiency lower costs reduce emissions and increase durability. This ceramic layer creates the largest thermal gradient of the tbc and keeps the lower layers at a lower temperature than the surface.

Desirable properties of the ceramic barrier coating include a high thermal expansion coefficient low thermal conductivity chemical stability in the gas turbine environment and thermal shock resistance. 250 000 700 000 psi at rt.