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Thermospray Technology: Multi-Chamber Detonation Spraying (MCDS)

MCDS is designed for the deposition of high-quality cemented carbide and ceramic end metallic alloy coatings using HVOF/HVAF powders. An MCDS coating produces high particle velocity and temperature, which leads to an impermeable tungsten carbide coating. This coating has a hardness of up to 1300 HV300.

Sputtek serves a variety of industries with MCDS coating, including the printing, oil, gas, power generation, aerospace and paper industries. Please see the table below for a list of sample processes.

Powder Cut Velocity D.E. Spray Rate
WC-based powders -30+10 μm
-25+5 μm
600 - 800 m/s 80-90% 1,2 kg/h max
CrC-based powders -25+5 μm 600 m/s 70-80% 1.2 kg/h max
Al2O3 – based powders -20+5 μm 600 m/s 70-80% 1.2 kg/h max
ZrB2-MoSi2– based powders -15+5 μm 1000-1200 m/s 50-60% 0.6 kg/h max
ZrSiO4 - based powders -20+5 μm 1000-1200 m/s 60-70% 0.8 kg/h max
Metal (Ti,Ni,Cr,Mo,Cu…) – base powders -45+5 μm 800-1000 m/s 80-90% 2-3 kg/h max
  • WC-based coatings with hardness of up to 1300 HV300
  • Al2O3-based coatings with hardness of up to 1300 HV300
  • Ti-based coatings with hardness of up to 1000 HV300
  • Coating porosity typically below 0.5%
  • Low compressive residual stresses in coatings
  • Negligible oxide content in coatings
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