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Post Processing

POCO materials can be purified to less than 5 ppm, densified to reduce open porosity by as much as 80%, or impregnated with resins, oxidation inhibitors or metals. Surface treatments and coatings are available to provide a sealed surface, to improve wear characteristics or to reduce particles.

 

Some of these additional processes are applied to bulk materials and others are recommended after final machining.

  

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Bulk Materials

All POCO grades are available as bulk product, but post processing is normally done on 5-micron grain size materials.

Machined Parts

Surface treatments such as pyrolytic coatings should only be done on finished, machined parts. Machining after treatment will expose the graphite substrate.