What is an Atmospheric Plasma Spraying (APS) Coating System?
An atmospheric plasma spraying system is a device that forms a coating layer on a substrate surface by melting and spraying materials using plasma as a heat source under atmospheric pressure, without requiring a vacuum environment.
Inert gases (mainly argon, helium, nitrogen, etc.) are ionized by applying a high-frequency electric arc to generate plasma.
The plasma jet has ultra-high temperature (about 10,000–16,500℃) and high velocity (about 600 m/s).
Metal, alloy, or ceramic powders are injected into the plasma jet.
The powders become fully or partially molten and collide at high speed with the substrate surface.
Upon impact, they rapidly cool and solidify, forming a layered coating structure.
Dense and smooth coating layer → excellent mechanical strength and adhesion.
Improved wear resistance, corrosion resistance, and heat resistance.
Substrate temperature rise is limited to below 200℃, minimizing thermal deformation and enabling application to various materials (metals, ceramics, plastics, etc.).
Aerospace: Heat- and wear-resistant coatings for turbine blades and rocket nozzles.
Semiconductors & Electronics: Enhanced insulation and surface modification.
Energy & Industrial Equipment: Corrosion- and heat-resistant coatings for boiler tubes and gas equipment.
Medical: Surface modification of implants (e.g., hydroxyapatite coating on titanium).