Plasma Spray Process
A high temperature plasma stream is created by non-transferred
plasma arc within the torch. Many gases may be ionized this way,
argon or nitrogen with small additions of hydrogen and helium
are popular choices.
In an ionized gas, free electrons have been stripped from the
atoms and recombination releases very significant thermal
energy. The plasma stream can reach temperatures of
10,000-50,000 degrees Fahrenheit.
Plasma Sprayed Chromium Oxide Coating
The microstructure shows a very dense coating with microhardness
values in excess of 1200 HV 0.3