Coatings for jet engine components

Jet engines are some of the most sophisticated mechanical systems created by humankind, needing to meet strict reliability demands in severe operating conditions that include high temperatures, abrasion, hot corrosion and oxidation. Ever-increasing fuel efficiency requirements  further challenge material and surface treatment selections for components of the engine.

Compressor and fan sections often require protection against hard particle erosion of airfoils. New turbofan engines with larger fans are even more susceptive to erosion damage, which ultimately leads to shorter MRO intervals.  IHI Ionbond offers a range of TiN and TiAlN coatings that provide effective protection against erosion.

Combustor and turbine sections operate at extremely high temperatures, requiring specialty coatings. For this purpose, IHI Ionbond developed a line of aluminum-based diffusion coatings applied by a chemical vapor deposition (CVD) process. These coatings provide excellent protection against oxidation and hot corrosion on components such as airfoils, abradable seals and others. Unlike other aluminizing methods, CVD is environmentally friendly and does not utilize any powder media. In addition, the process allows for modification of classic aluminides with doping elements to further improve coating performance.

Tribobond physical vapor deposition (PVD) coatings are applied as a standard to components of main engine bearings. These coatings improve wear performance and prevent galling, fretting and surface fatigue.