Yttria stabilized zirconia (8Y2O3-ZrO2) powders manufactured
by Oerlikon Metco’s HOSP™ process combine the advantages of pre-alloyed, fused and crushed powders together with
the free flowing, consistent shape of spray dried powders.
Densification via the HOSP process ensures high deposit efficiency during the coating process, reducing application time
and overspray waste. Powders are spheroidal with excellent
flow, chemical homogeneity and structural stability. Compositions are manufactured from high purity raw materials, and
produce coatings that provide long-lasting, reliable service.
Typical Uses and Applications :
- Top coat (insulating layer) in a thermal barrier coating
(TBC) system for industrial and flight gas turbine engine
components such as combustion liners, transition pieces,
afterburners, heat shields, turbine airfoils.
- Thermal protection at temperatures up to 900 °C
(1650 °F) on metallic diesel and gasoline engine components such as cylinder heads, piston crowns, exhaust
and intake valves, turbochargers.
- In general, these materials are used as the insulating layer
in a two-part TBC system, consisting of a thermal
sprayed bond coat and YSZ top coat. For some applications, they are used as intermediate layers between
an oxidation-resistant bond coat and a more porous,
low-K TBC system.
