Glossary

See preferred term Blasting.

Material such as sand, crushed chilled cast iron, crushed steel grit, aluminum oxide, silicon carbide, flint, garnet, of crushed slag used for cleaning or surface roughening.

To take in and engulf wholly.

A filter lens designed to attenuate the effects of glare and reflected and stray light. See Filter Plate.

A soundproof enclosure, containing thermal spraying and sometimes related auxiliary equipment. Its design and construction prevent any unacceptable process noises from interfering with normal work in the environment surrounding the enclosure.

A binding force that holds together molecules of substances whose surfaces are in contact or near proximity.

The magnitude of attractive forces, generally physical in character, between a coating and substrate. Two principle interactions that contribute to the adhesion are van der Waals forces and permanent dipole bonds.

To take in on the surface.

A device for forming, shaping and directing an air flow pattern for the atomization of wire or ceramic rod.

See preferred term Workpiece Cooler.

A thermal spraying process variation in which an air stream carries the powdered surfacing material through the gun and into the heat source.

Mechanism for cleaning air of contaminants such as water, oil, and solid matter.

A chemical compound (aluminum oxide);a ceramic used in powder or rod form in thermal spraying operations. May also be a blasting medium.

A supplemental method of locking the thermal spray deposit to the substrate by screw heads, studs, or similar means.

The electrode maintained at a positive electrical potential. In typical plasma thermal spraying gun designs, this is the front electrode, constructed as a hollow nozzle and usually fabricated from copper. In electric arc thermal spraying guns, one feed wire is the positive electrode.

The ratio of the measured density of an object to the absolute density of a perfectly solid material of the same composition, usually expressed as a percentage.

The ratio of the measured density of an object to the absolute density of a perfectly solid material of the same composition, usually expressed as a percentage.

A luminous discharge of electrical current crossing the gap between two electrodes.

The confined space within the plasma thermal spraying gun enclosing the anode and cathode, in which the arc is struck.

The confined space within the plasma thermal spraying gun enclosing the anode and cathode, in which the arc is struck.

The axial force developed by an arc plasma.

The gas introduced into the arc chamber and ionized by the arc to form a plasma.

Primary. See preferred term Primary Gas.

Secondary. See preferred term Secondary Gas. Arc Plasma. A gas that has been heated by an electric arc to at least a partially ionized condition, enabling it to conduct an electric current.

A thermal spraying process using an arc between two consumable electrodes of surfacing materials as a heat source and a compressed gas to atomize and propel the surfacing material to the substrate.

(1) The division of molten material at the end of the wire or rod into fine particles. (2) The process used in the manufacture of powder.

A device used to direct compressed air to prevent overheating of the thermal spraying deposit or the substrate.