Why YSZ is a good thermal barrier coating material?

YSZ is widely adopted for thermal barrier coatings (TBCs) on gas turbine blades made of an Ni-based superalloy because of its high thermal stability, low thermal conductivity, and a relatively large thermal expansion, which is close to that of the metal substrate.

Which material is used for thermal barrier coating?

The most commonly applied TBC material is yttria stabilized zirconia (YSZ) which exhibits resistance to thermal shock and thermal fatigue up to 1150°C. YSZ is generally deposited by plasma spraying and electron beam physical vapour deposition (EBPVD) processes.

Which of the following coating is used as the top coating for thermal Barrier application?

yttria stabilized zirconia
Thermal barrier coatings (TBCs) with a two-layered structure consisting of an oxidation protective bond coat and a thermally insulating yttria stabilized zirconia (YSZ) top coat are used to provide thermal insulation and oxidation resistance to metallic components from the hot gas stream in gas turbine engines used for …

What is YSZ used for?

Used in the production of a solid oxide fuel cell (SOFC). YSZ is used as the solid electrolyte, which enables oxygen ion conduction while blocking electronic conduction. In order to achieve sufficient ion conduction, an SOFC with a YSZ electrolyte must be operated at high temperatures (800 °C-1000 °C).

What is meant by thermal barrier coating?

Thermal barrier coatings (TBCs) are widely applied in protecting metallic components, which are used in aero- and land-based gas turbines. These hot-section components include a combustion chamber, blades, and vanes. The TBC leads to significant reduction of heat transfer from the high temperature gas to metal surface.

How are thermal barrier coatings applied?

Although most ceramic coatings are applied to metallic parts directly related to the engine exhaust system, technological advances now allow thermal barrier coatings to be applied via plasma spray onto composite materials.

How thick are thermal barrier coatings?

It is typically 75-150 μm thick and made of a NiCrAlY or NiCoCrAlY alloy, though other bond coats made of Ni and Pt aluminides also exist.

What is YSZ substrate?

YSZ is widely used as an oxide crystal substrate for the epitaxial growth of thin films. Both standard and custom-made products are available from MSE Supplies.

Is yttria a ceramic?

Yttria (yttrium oxide, Y2O3) is a rare-earth ceramic which exhibits both exceptional plasma resistance and an aptitude for high-temperature applications.

Where is barrier coating used?

What does YSZ stand for?

Yttria-stabilized zirconia (YSZ) is a ceramic in which the cubic crystal structure of zirconium dioxide is made stable at room temperature by an addition of yttrium oxide. These oxides are commonly called “zirconia” (ZrO2) and “yttria” (Y2O3), hence the name.