Plasma Spraying

plasma-1Plasma is the term used to describe gas which has been raised to such a high temperature that it ionises and becomes electrically conductive. In the case of Plasma spraying, the plasma is created by an electric arc burning within the nozzle of a plasma gun and the arc gas is formed into a plasma jet as it emerges from the nozzle. Powder particles are injected into this jet where they soften and then strike the surface at high velocity to produce a strongly adherent coating.

PS 50 Metallisation Plasma Spray system

With 90% of all plasma coatings being sprayed with 40Kw or less, the Metallisation PS50M system is designed to meet Aerospace standards as well as the general thermal spray market.

The system comprises of six main elements:
The Plasma spray gun PLA5000
Mass flow control unit
PS50M powder feeder
PS50M inverter power supply
Supplies package
Heat exchanger to suit site conditions

Features of the PS 50:

Simple to operate and maintain
Accepts a full range of plasma metallising materials including metals, ceramics and plastics.
Long electrode life
Low power consumption
Low noise
Low substrate temperatures
Straight and deflector plasma extension nozzles available

Applications

Spraying of seal ring grooves in the compressor area of aeroengine turbines with tungsten carbide/cobalt to resist fretting wear.
Spraying of zirconia-based thermal barrier coatings (TBCs) onto turbine combustion chambers.
Spraying of wear resistant alumina and chromium oxide ceramic onto printing rolls for subsequent laser and diamond engraving/etching.
Spraying of molybdenum alloys onto diesel engine piston rings.
Biocompatible hydroxyapatite coatings for prostheses.