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The amorphous hydrogenated carbon lms (a-C:H) were formed on the stainless steel substrates from an argonnacetylene gas mixture at atmospheric pressure using a direct current plasma torch discharge. The carbon lms were deposited using Ar=C2H2 gas volume ratios 100:1, 150:1, and 200:1 and plasma torch power of 600 and 870 W. It has been obtained that the increase of the torch power leads to higher lm growth rate and increases surface roughness. The growth rate varies from 20 up to 425 nm=s depending on the coating formation conditions. The structure and dominant bonds of the lms were investigated by Fourier transform infrared (FTIR) and Raman spectroscopy (RS) measurements. RS results indicated that the sp 2 =sp 3 content in the lms depended on the torch power and C2H2 amount in argon plasma. It was demonstrated that a diamond-like / graphite-like carbon and glassy carbon lms could be deposited by varying the Ar=C2H2 ratio and plasma torch power.

Influence of torch power and Ar/C2H2ratio on structure of amorphous carbon films

Influence of torch power and Ar/C₂H₂ratio on structure of amorphous carbon films