Ceramic  Coatings

• Ceramics applied by Plasma  spray are used for
      • Dielectric strength
      • Sliding wear
      • Thermal barriers
      • Corrosion protection
• Typical thickness of 0.1 to 0.7mm
• Hard ceramic coating materials, 60-68 HRC
• Very dense to porous depending on application requirements
• Excellent adhesion
• Can be ground to a 0.4 Ra surface finish, or superfinished to  0.1Ra.

Common Coatings:

• Aluminum Oxide, : Al2O3, Al2O3/ 3TiO2, Al2O3/ 13TiO2, AlO3/40TiO2)
• Chromium Oxide: (Cr2O3 , Cr2O3+TiO2+SiO2) – Highest hardness
• Titania (TiO2)
• TBC : Yttria stabilized Zirconia ( thermal barrier coatings, ZrO2-8% Y2O3)
• Zirconia : (Ca or Mg Zirconium Oxide )

Metal and Metal Alloy  Coatings

• Metal alloys can be used as bond coatings for other thermal spray coatings
• Nickel and Ni alloys such as NiAl are commonly used for dimensional buildup of parts for ease of
  machining
• Stainless steel, NiCr, etc. can be used to restore dimensions or to put an improved surface for wear and
  corrosion.
• Stellite, Triballoy, and other tribological materials can be used for improved performance over an easily
  fabricated base material.
• Molybdenum (Mo) and other refractory metals can be used for high temperature wear resistance, for sliding
  wear, and applications requiring lubricity. Widely used on automotive parts.
• Cobalt (Co), Tantalum (Ta), Chromium (Cr), Tungsten (W) and similar types of materials offer specialized
  properties.
• Copper (Cu) and Aluminum (Al) based materials are used for corrosion resistance, electrical conductivity,
  thermal conductivity, and other applications
• MCrAlY’s, such as CoCAlY, NiCrAlY, CoNiCrAlY and NiCoCrAlY, are used for hot oxidation protection and
  corrosion protection in gas turbine applications and in high temperature wear and corrosion up to 1000°C.
  They are also excellent bond coat materials.

Common coatings:

• MCrAlY’s (NiCrAlY, CoCrAlY, NiCoCrAlY, CoNiCrAlY)
• Nickel Aluminum alloys (NiAl) ,Nickel Chrome
• Molybdenum (Mo) and Mo alloys
• Titanium (Ti)
• Stellite : # 1,12, 6, 20, 21
• Triballoy
• Ferrous alloys : SS 316, 304, 413, 420, 174Ph
• Non Ferrous alloys : Cu, Al, Ph Bronze, Al Bronze, Babbitt

Abradable Thermal Spray Coatings

Our Advanced Coatings Enhance the Performance of Your Parts by tight  clearance control
• These coatings are used in gas turbine engines for clearance control. As the rotating assemblies and blades heat up and cool down, they change in size because of thermal expansion. Manufacturing the assemblies to achieve close clearances during operation is difficult. The solution is to add a thick clearance control coating to the housing. As the blades rotate and heat up, they abrade a path through the abradable coating making a near perfect fit groove to run in. This close fit provides low leakage around the perimeter of the blades.
• This specialized coating must be soft enough to abrade away as desired. Yet tough and heat resistant enough to last for the long run.
• Ni-graphite, NiAl-Bentonite, Nickel-Aluminum, Aluminum Silicon-Graphite, AlSi-Polyimide, AlSi-Polyester are common abradable coating materials.