Plasma

This technique is based on the creation of an electric arc in a mixture of plasma gases. The plasma, whose temperature can reach 16,000°C, is used to melt a stream of powder as it passes through the torch.

Different “plasmagen” gases are used such as argon, helium, nitrogen or hydrogen. The gas mixture and the spraying conditions can be adjusted in order to modify the thermal properties of the plasma as well as the speed of the particles.

The powder flux used depends on the material to be deposited. These can be metals, metal alloys, carbides, oxides, etc., whose composition and particle size are finely controlled. This is propelled by a carrier gas in order to be injected into the plasma gas mixture.

This technology is optimal for ceramics and abradables.

• Projected materials: powder – ceramics, abradables, metals and their alloys
• Maximum arc temperature: 16,000°C
• Particle speed: 200 – 400 m/s

Plasma projection is done under atmospheric pressure and notably makes it possible to reinforce parts intended for use in extreme conditions.

The coatings obtained by this method are used in many sectors: aerospace, automotive, energy, defense…

This process is:

• Ultra pure
• Suitable for all types of materials including ceramics and high melting point materials