| High Velocity Plasma Coatings |
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| Typical power levels
employed are 40-80 KWDC. The additional energy available, coupled
with slightly modified torch design, translates to both higher
thermal energy and higher particle velocity. The result is more
complete melting of high temperature materials (ceramics) and
greater integrity of the resultant coating. PTI applies something
over two hundred coatings by the complementary plasma techniques. |
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| There are thirty-two
significant variables in the plasma coating process. The
manipulation of these variables enable coating properties to be
tailored to meet the properties desired for each application. It is
the control of these variables that determine the repeatability of
the process. |
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| Low Velocity Plasma Coatings |
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| 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. |
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| 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. |
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