Thermal spraying techniques are coating processes in which melted (or heated)
materials are sprayed onto a surface. The "feedstock" (coating precursor) is
heated by electrical (plasma or arc) or chemical means (combustion flame).
Thermal spraying can provide thick coatings (approx. thickness range is 20
micrometers to several mm, depending on the process and feedstock), over
a large area at high deposition rate as compared to other coating processes
such as electroplating, physical and chemical vapor deposition.
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