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Diamolith DLC

Pure hard Diamond-like-Carbon Engineering Coatings

Diamolith is a pure diamond-like carbon coating deposited by Plasma enhanced Chemical Vapour Deposition (PECVD). Diamolith is deposited by vacuum based process where precursor gases are introduced into the process chamber and are broken down within the ionized plasma into various species of carbon, hydrogen and other dopants which are subsequently condensed as a solid entity onto the substrate surface.

The resultant coating has a number of unique properties that can be imparted on to the substrate to improve performance of the DLC coatings are a family of coatings made up primarily of carbon chains in an amorphous structure with sp2 (triagonal graphite form) and sp3 tetrahedral (diamond form) bondings.

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General Overview of Diamolith Coating Properties

Diamolith is a hard, wear resistant, carbon based Coating. Diamolith provides excellent surface finish and smooth surface replication. Also provides very low coefficient of friction, which improves with use and lubrication. Diamolith has a dense and amorphous structure providing excellent corrosion resistance. The PECVD process allows three dimensional parts to be coated with thickness conformity around the geometry.

Composition Typical 30-50% sp2(Graphitic)Bond / 50-70% sp3 (Diamond) bond. Variable with process
Deposition Temperature 180-300oC
Hardness Microhardness 10-40GPa / [1800-3000Hv]. Variable with process
Youngs Modulus 170-200 GPa
Stress 0.5-2.0 GPa
Sliding Wear Rate 5.1E -07mm/Nm2compared against 6.2 E-04for uncoated17-4 PH St St
ASTM G133. 25N load Dry
Abrasion Resistance ASTM G65 Test Dry Sand vs Rubber Wheel
60 times more than Hardened Steel
15 times more than Super Duplex Stainless Steel
Coefficient of Friction 0.04-0.08 . Dependant on substrate surface condition improved with polished surface. Test 25N load Non lubricated
Adhesion to substrate Lc1,10N / Lc2,25N / Lc3, 60N measured in scratch test
Coating Thickness 2-4 microns
Colour Black
Biocompatibility Non Toxic, Non Cyto-Toxic, Non-Gentotoxic, Non-Carcinotoxic
Max Operating Temperature 400-500oC
Electrical Resistivity 400-800Wm2/k (1010ΩCm)
Chemical Stability Stable in Acids, Alkalis, Solvents and Gases


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