There are different types of technology like PVD, CVD, PACVD,rfPACVD, DCPACVD... which one I should choose?
Ideally this should be a low hydrogen content DLC material. Filtered cathodic vacuum arc or Pulsed laser deposition would be best. If only hydrocarbon based CVD available PECVD with ion bombardment (high negative self bias) would give the best quality.
Ideally this should be a low hydrogen content DLC material. Filtered cathodic vacuum arc or Pulsed laser deposition would be best. If only hydrocarbon based CVD available PECVD with ion bombardment (high negative self bias) would give the best quality.
For hydrogenated DLC on e.g. piston rings or other mechanical components, it's possible to use pulsed-DC hollow cathode PECVD, or reactive sputtering (PVD) from pyrolytic graphite target in acetylene atmosphere. (There are already some companies using these processes for this type of coating commercially).
A very good process for DLC deposition is gas cluster ion beam. The equipment is available commercially from a company called Epion and the result is a well-adherent DLC film with low hydrogen. See
https://www.researchgate.net/publication/32140341_Hard_DLC_film_formation_by_gas_cluster_ion_beam_assisted_deposition
Article Hard DLC film formation by gas cluster ion beam assisted deposition
There are a multitude of different technologies that can be used to produce the DLC coatings, but this will be dictated by the parameter space in which the deposition can take place as well as the substrate type. For those interested in the different forms of DLC and the processes that can be used to deposit the same have a look at the following book ... Properties of Amorphous Carbon ...
http://books.google.co.uk/books?id=OemOXv486j0C&printsec=frontcover&dq=properties+of+amorphous+carbon&hl=en&sa=X&ei=PG52UYb4N8KLOYTEgUA&ved=0CDkQ6AEwAA
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