Turbine and compressor components combine temperature, oxidation, corrosion, erosion, fatigue and geometric complexity.
Why turbine components are a strong case
Internal cavities of cooled gas-turbine blades add a challenge: the coating process must reach complex internal surfaces with controlled composition and thickness.
CVD coatings
CVD is relevant where coating formation on internal surfaces or complex geometries is required.
Supplier review
Important points include temperature capability, vacuum and gas control, precursor delivery, source stability, fixture design, uniformity, adhesion and phase composition.