Abradable Seal Coatings for Compressor & Turbine Clearance Control

The Challenge

Tight running clearances between rotating blades and stationary housings are essential for achieving high compressor and turbine efficiency.

However, direct contact between blade tips and housing surfaces can cause blade damage, while excessive clearance results in gas-path leakage, reducing overall system performance and efficiency.

The Solution

Plasma Spray Processors applies soft, sacrificial abradable coatings that allow housings to wear safely against rotating blade tips without damaging critical rotating components.

Ni-graphite and AlSi-polyester coating systems are selected and engineered according to the operating conditions and temperature requirements of each compressor or turbine stage.

• Ni-graphite and AlSi-polyester abradable coating systems.
• Tailored abradability and temperature resistance for specific operating stages.
• Applied to minimize blade-tip and labyrinth seal clearances.

The Result

• Minimized tip and labyrinth clearances for improved compressor and turbine efficiency.
• Protection of blade tips while maintaining effective sealing performance.
• Reduced gas-path leakage and improved energy efficiency.
• Stage-specific clearance control optimized for operational requirements.