Coating Applications for Aviation Engines

Aviation

Coating Applications for Gas Turbine Engines

Afterburner Section (not illustrated)

Combustion Section

Bearings & Accessories Turbine Section

Compressor Section

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Combustion Section Part Name Coated Area Typical Coating Type Typical Mating Surface Typical Objective of Coating Combustion Chamber Assembly, Interior surfaces Thermal barrier, LTB-8, LTB-12, Hot gases Thermal barrier Liners and Domes LTB-13, LTB-16, TribometT MCrAlY Combustion Chamber O.D. (non-gas path) SermeTelT 2241 Al-ceramic coat- Ambient environment Corrosion resistance Cases surfaces ing; SermaLoy J slurry aluminide Combustion Chamber I.D. gripping surface Chrome carbide LC-1B, LC-18, Self-mating, coated combustion Fretting wear resistance Clamp TribometT T104CS chamber liner O.D. Combustion Chamber O.D. surface Chrome carbide LC-1B, TribometT Self-mating, coated combustion Fretting wear resistance Liner T104CS chamber clamp I.D. Combustion Chamber Bearing surfaces Tungsten carbide LW-1N40; Self-mating, coated bearing Fretting wear resistance Positioning Pin Chrome carbide LC-1B surfaces Combustion Chamber I.D. bearing surfaces Chrome carbide LC-1B, LC-18 Self-mating, coated liners and Fretting wear resistance Support Assembly guides Fuel Nozzle Nut O.D. bearing surfaces Chrome carbide LC-1B, LC-18 Self-mating, coated I.D. of swirler Fretting wear resistance Fuel Nozzle Nut Threads on I.D. Copper-nickel-indium LCN-1 Threads on fuel manifold Preventing nozzle nut loosening Fuel Nozzle Nut Threads on I.D. SermaLoyE J slurry aluminide Hot air, fuel Oxidation and sulphidation resistance Fuel Swirler I.D. bearing surfaces Chrome carbide LC-1B, LC-18 Self-mating, coated O.D. Fretting wear resistance Thermocouple Probes Gas path SermaLoyE J slurry aluminide Hot gases Oxidation and sulphidation resistance

Bearings & Accessories Part Name Coated Area Typical Coating Type Typical Mating Surface Typical Objective of Coating Bearing Housings & Seal I.D. sealing surfaces Chrome carbide LC-1C; Carbon rings Sliding wear resistance Assemblies Tungsten carbide LW-1 Bearing Rings Bearing surfaces Titanium nitride 24K Housings Fretting wear resistance Bearing Seal Housings I.D. secondary Tungsten carbide LW-1N30, Tungsten carbide coated Fretting wear resistance seal area LW-1N40 seal rings Bearing Seal Seats & Spacers Annular sealing face Chrome carbide LC-1C; Carbon-graphite seal Sliding wear (both surfaces) Tungsten carbide LW-1 resistance Bearing Supports Non-contact areas SermeTelT W, 2F-1, 5380, Corrosion resistance 5380DP Al-ceramic coatings – Gearbox Support Pins, Bushings Bearing surfaces Tungsten carbide LW-1N40 Self-mating, coated bearing Fretting resistance & Lugs surfaces Labyrinth Seal Fins & Seal Teeth Knife-edge tips Tungsten carbide LW-1N40; Porous metal, honeycomb Rubbing wear resistance and face chrome carbide LC-1B; or abradable coatings aluminum oxide LA-2, LA-21; TribometT CBN abrasive Main Shaft Bearings Bearing shoulders Titanium nitride 24K Bearing cage, silver-plated Sliding wear resistance Oil Pump Gears O.D. bearing journals Tungsten carbide LW-1N40 Bronze bushing or Fretting wear resistance aluminum housing Oil Scavenge & Breather Tubes O.D. sealing surfaces Tungsten carbide LW-1N40 Steel Fretting wear resistance

Creative2:Clients:Praxair:5700-22403De-archive jobs for client disc:Output:5700-19332 AviationCoatingApplic_Gas Turbine_v09:5700-19332 AviationCoatingApplic_Gas Turbine_v09 Folder:5700-19332 AviationCoatingApplic_Gas Turbine_v09.indd December 17, 2012 2:53 Page PMCreative2:Clients:Praxair:5700-22403 3 De-archive jobs for client disc:Output:5700-19332 AviationCoatingApplic_Gas Turbine_v09:5700-19332 AviationCoatingApplic_Gas Turbine_v09 Folder:5700-19332 AviationCoatingApplic_Gas Turbine_v09.indd December 17, 2012 2:53 Page PM 4 Turbine Section Part Name Coated Area Typical Coating Type Typical Mating Surface Typical Objective of Coating Air Sealing Rings Annular surfaces Chrome carbide LC-1B, LC-18; Self-mating, coated annular Fretting wear resistance TribometT T104CS, cobalt services alumina LCO-17 Exhaust Fairing Bearing surfaces Tungsten carbide LW-1N40 Self-mating, bearing Fretting wear resistance Pins & Bushings surfaces Outer Airseals & I.D. sealing surface Cobalt alloy LCO-22, Blade tip Rub-tolerant surface for sealing; Turbine Shrouds Mar M-509, thermal barrier thermal barrier with erosion LTB-8, LTB-13 resistance Outer Airseals & Inside diameters Chrome carbide LC-1B Air flow Erosion resistance (against Turbine Shrouds catalyst particles in expanding gases) Outer Airseals & Gas path surfaces Aluminides - SDC Hot gases Oxidation and sulphidation Turbine Shrouds 1544,1567,1572,1573 resistance Thrust Frame Bearing surfaces Tungsten carbide LW-1N40 Self-mating, bearing Fretting wear resistance Boss & Clevis surfaces Turbine Blades Unshrouded tip Cobalt alumina LCO-17; Honeycomb, porous metal, Rubbing wear resistance TribometT CBN abrasive nickel-base alloy Turbine Blades Top side of shrouded tip Cobalt alumina LCO-17 Outer airseal Rubbing wear resistance Turbine Blades Shroud Z-notches and Chrome carbide LC-1B; cobalt Self-mating, interlocking Fretting wear resistance above knife-edge seals alumina LCO-17, LCO-19, shrouds 1000° F (538° C) L-10; Tribaloy* LDT-800 Turbine Blades Shroud Z-notches and Tungsten carbide LW-1N40 Self-mating, interlocking Fretting wear resistance below knife-edge seals shrouds 1000° F (538° C) Turbine Blades Underplatform Underside of platform PWA 545 slurry, cathodic arc Hot gases Hot corrosion, SCC resistance coatings, chromizing and chrome aluminizing Turbine Blade Tips Turbine blade tip TribometT MCrAlY and abrasive Abradable seal material Sealing at tip of turbine blade tip, STCC ceramic cutting tip Turbine Blades & Vanes Airfoil & platform Cobalt alloy LCO-22, LCO-29; Hot gases Oxidation and sulphidation gas path surfaces Thermal barrier LTB-8, LTB-13, resistance; thermal barrier LTB-19; MCrAlY overlays; EBPVD, EBPVD YSZ; Platinum aluminide, Vapor phase aluminide (PWA 273, 275); Pack aluminides (PWA 44, 73, 252 RPS 320); Pack chromide (F50TF37, PWA 70); SermaLoyE J slurry aluminides, TribometT MCrAlY Turbine Blades & Vanes Internal cooling passages Vapor phase aluminide; Hot gases Internal cooling passage SermAlcoteE 2500, 2525 slurry oxidation and corrosion aluminide, PWA 273 slurry, pack resistance aluminides where access permits; also vapor chromizing Turbine Blades & Vanes Damaged coating on SermaLoyE J slurry aluminide Hot gases Repair of protective airfoil & platform gas coating layers path surfaces Turbine Blades & Vanes Airfoil & platform surfaces Cobalt alloy LCO-22, LCO-29; Hot gases Oxidation and sulphidation Thermal barrier LTB-8, LTB-13, resistance; thermal barrier LTB-19; MCrAIY Overlays; EBPVD; Platinum aluminide; Vapor phase aluminide Turbine Brush Seals Airfoil & platform surfaces Chrome carbide LC-1B Hot gases Erosion resistance (against catalyst particles in expanding gases) Turbine Brush Seals Bearing surfaces Chrome carbide LC-1B, LC-1H Seal bristles Sliding & brush wear resistance Turbine Stator Shrouds Shroud flanges Chrome carbide LC-1B, LC-18; Self-mating, coated vane Fretting wear resistance Cobalt alumina LCO-17, LCO-19, inner-foot pads L-103 Turbine Vanes Inner-foot pads Chrome carbide LC-1B, LC-18; Self-mating, coated Fretting wear resistance Cobalt alumina LCO-17, LCO-19, stator shroud flanges L-103 Turbine Exhaust Case Gas path surfaces SermeTelT 2241 Al-ceramic Corrosion resistance coatings – Turbine Nozzle Case Gas path surfaces SermeTelT 2241 Al-ceramic Corrosion resistance coatings –

Creative2:Clients:Praxair:5700-22403De-archive jobs for client disc:Output:5700-19332 AviationCoatingApplic_Gas Turbine_v09:5700-19332 AviationCoatingApplic_Gas Turbine_v09 Folder:5700-19332 AviationCoatingApplic_Gas Turbine_v09.indd December 17, 2012 2:53 Page PMCreative2:Clients:Praxair:5700-22403 3 De-archive jobs for client disc:Output:5700-19332 AviationCoatingApplic_Gas Turbine_v09:5700-19332 AviationCoatingApplic_Gas Turbine_v09 Folder:5700-19332 AviationCoatingApplic_Gas Turbine_v09.indd December 17, 2012 2:53 Page PM 4 Compressor Section Part Name Coated Area Typical Coating Type Typical Mating Surface Typical Objective of Coating Bevel Gear, Gearbox Drive I.D. bearing surface Tungsten carbide LW-1N40 Self-mating, coated hub O.D. Fretting wear resistance Bleed Manifold Expansion O.D. & I.D. sealing Tungsten carbide LW-1N40 Seal mating, Sliding, fretting resistance Joint Liners & Sleeves surfaces coated seal rings Compressor Blades Blade tips of outer Alumina+titania LA-229; Compressor case or Overheating, wear resistance airfoil section Aluminum oxide LA-2; ZircoatT, abradable coating TribometT abrasive tip Compressor Blades Airfoils Tungsten carbide LW-2A, LW-1N30, Air flow Solid particle erosion (with SDG 2002, Titanium nitride 24K; mineral fatigue) resistance Chrome carbide LC-1H Compressor Blades, Airfoil gas path surfaces SermeTelT W, 725, 2F-1, 6F-1 Intake air Corrosion resistance Vanes & Stators Al-ceramic coatings Compressor Blades, Airfoil gas path surfaces SermeTelT 5375, 5380DP, Intake air Corrosion, fouling resistance; Vanes & Stators SermaFlowE S4000, SermaLonT aerodynamically smooth Al-ceramic coatings surface Compressor Blades, Airfoil gas path surfaces SDC 1577 diffused aluminide Intake air Corrosion and oxidation Vanes & Stators resistance to 550°C Compressor Blades, Airfoil gas path surfaces SermaFlowE N3000 ceramic Intake air Aerodynamically smooth surface; Vanes & Stators barrier coating; hot corrosion and fouling resistance to 700°C (LTHC) Compressor Blisks Airfoil gas path surfaces SermeTelT 5380, 5380 DP Fouling, corrosion and Al-ceramic coatings – oxidation resistance Compressor Case Flanges Tungsten carbide LW-1N40 Self-mating with adjacent case Fretting wear resistance Compressor Case Entire case SermeTelT W, 2241, 2242, Intake air Corrosion and oxidation 5380, 5380 DP, 725 Al-ceramic resistance to 550°C coatings Compressor Case Seal surfaces on I.D. Ni-graphite, Al-polyester Compressor blade tip Sealing Compressor Hubs Bearing journal diameters Tungsten carbide LW-1N40 Bearing inner races & tungsten Fretting wear resistance carbide coated bevel gear I.D. Compressor Hubs & Disks Snap diameters Tungsten carbide LW-1N40 Spacer snap diameters Fretting wear resistance Compressor Hubs & Disks Most areas SermeTelT W, 2241, 5380DP Compressor/fan shaft; blade roots Corrosion and oxidation Al-ceramic coatings; SDC resistance to 550°C 1577 diffused aluminides Compressor Hubs & Disks Blade slots Dry film lubricants Blade roots Fretting resistance; removal assurance at overhaul Compressor Spacers Most areas SermeTelT W, 2241, 5380 Intake air Corrosion and oxidation DP Al-ceramic coatings resistance to 550°C Compressor Rotor Tube Seal ring grooves and lands Tungsten carbide LW-1N40 Seal rings & tungsten carbide Fretting wear resistance and Sleeves coated hub bushing Compressor Seals Gas path and SermeTelT W, 2241, 5380 DP LTHC, corrosion resistance non-contact areas Al-ceramic coatings – Compressor Rings Gas path and SermeTelT W, 2241 Al-ceramic coat- Corrosion, fouling and non-contact areas ings; SermaFlowE N3000 ceramic – hot corrosion resistance barrier coating Diffusers, Impellers Vane surfaces Tungsten carbide LW-1N30, Air flow Particle erosion resistance & Vane Sectors LW-2A, SDG 2002; Titanium with minimal fatigue debit nitride 24K; TribometT Diffuser Case Gas path SermeTelT W, 2241, Corrosion and oxidation Al-ceramic coatings – resistance to 550°C Fan Blades & Midspan shroud pads Tungsten carbide LW-1N40, Self-mating, coated pads High-load, high-frequency fretting Compressor Blades SDG 2040 wear and cracking resistance; minimal fatigue debit Fan Blades & Compressor Root & foot section Copper-nickel-indium LCN-1; aluminum Titanium, steel, nickel, alloy, Galling, fretting wear resistance Blades & Vanes pressure faces bronze LCU-2 disks & housings Gas Generator Case Entire case SermeTelT 5380 DP Al-ceramic coating Intake, compressed air Corrosion and oxidation to 550°C HPC Stators Snap diameters Stellite* LS-31A; aluminum Titanium steel Galling, fretting wear resistance bronze LCU-2 Inlet Guide Vanes (IGVs) Trunnions Nickel-aluminum LN-5B Self-mating, coated bearing Wear, corrosion resistance surfaces Inlet Guide Vanes (IGVs) Airfoil surfaces SermeTelT 5375, 5380DP, SermaFlowE Corrosion resistance; S4000 Al-ceramic coatings – aerodynamically smooth surface Variable Guide Vanes (VGVs) Bearing surfaces, trunnions, Tungsten carbide LW-1N40 Self-mating, coated bearing Fretting wear resistance drive arms, sync ring surfaces Variable Guide Vanes (VGVs) Airfoil surfaces SermeTelT 5375, 5380DP, SermaFlowE Corrosion resistance; S4000 Al-ceramic coatings – aerodynamic surface finish Front Frames O.D. and gas path surfaces SermeTelT W, 725, 2F-1, 6F-1 Intake air Corrosion resistance Al-ceramic coatings Shafts I.D. and O.D. surfaces SermeTelT W, 2241, 1083/1140, Hot oils, hydraulic fluids Corrosion and oxidation 984/985 Al-ceramic coatings resistance to 550°C

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