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CAPS and COLD SPRAY

Thermal spray laboratory at the Competence Center for Spray Processing (C2P): CAPS plasma spray and cold spray facilities

Multi-processes plasma spraying equipment with controlled atmosphere and cryogenic cooling

The Competence Center for Spray Processing (C2P) of the Materials Research Center of the Ecole des Mines de Paris owns one multi-processes «CAPS» facilities (Controlled atmosphere Plasma Spraying).

The CAPS system consist in a 18 m3 chamber equipped with a robotized plasma spray unit (Sulzer-Metco). It is fitted for technology transfer and to achieve for coupons and demonstrating parts. With the controlled atmosphere: nature of filling gas (air, argon ou nitrogen), chamber pressure (2 to 350 kPa), temperature control (cooling and recirculating gas exchangers), this large scale facility can operate all the existing plasma spraying modes:

  • APS (100 kPa, air): «Air Plasma Spraying»
  • IPS (100 kPa, argon): «Inert Plasma Spraying»
  • VPS or LPPS (<100 kPa, argon): «Vacuum» or «Low-Pressure Plasma Spraying»
  • HPPS (100-350 kPa, argon): «High-Pressure Plasma Spraying»
  • RPS (2-350 kPa, azote): «Reactive Plasma Spraying».

In addition to this various range of plasma spray processes for metals and ceramics, a cryogenic cooling can also be applied using the «ATC» system (CEA patented) with liquid pulsed argon (plasma forming of thick parts and spraying on heat sensitive polymers). Moreover, a semi-transferred arc (STA) system is also avalaible to combine an in situ treatment of the substrate (cleaning or heating) prior to plasma spraying.

Cold gas dynamic spraying or «cold-spray»

The Ecole des Mines de Paris has been equipped (with help of the Essonne's department Councyl, ASTRE fundings) with the more innovative spraying process to achieve the deposition of metals and cermet coatings applying the cold gas dynamic spraying or «cold-spray» technology.

This new facility, machined for industry and laboratory (CGT kinetic 3000 M, 30 kW, 30 bar, 600°C N2, 450°C He, Buse de Laval WC) improve the battery of spraying facilities avalaible at the C2P.The cold spray gun can be installed within the robotized CAPS chamber (then, the cold spray technology can be applied with vaccum and controlled atmosphere that make the equipment CAPS + COLD SPRAY unique in the world). When the cold spray system is not in the CAPS chamber, a conventional cold spray booth is also avalaible for the cold spraying of small coupons and the testing of powders.

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