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Abstract
This paper presents studies on the morphology, mechanical and tribological properties of hydrogen-free diamond-like carbon (DLC) coatings deposited via magnetron sputtering under different bias voltages. Atomic force microscope (AFM), transmission electron microscope (TEM), Raman spectroscopy, nano-indentation and ball-ondisc tribotest were employed to characterize the deposited coatings. Diamond-like carbon coatings had very smooth surface with the roughness (Ra) of less than 3.5 nm (for 1.2 μm - thick coatings on Si wafer). Under high bias voltage, superhard coatings with hardness of more than 30 GPa were obtained. The self-lubrication mechanism of diamond-like carbon combined with smooth surface resulted in very low coefficients friction of less than 0.15. Magnetron sputtered diamond-like carbon show a big potential for tribological applications, especially, under dry or poorly lubricated conditions.
Issue: Vol 11 No 10 (2008)
Page No.: 100-109
Published: Oct 31, 2008
Section: Natural Sciences - Research article
DOI: https://doi.org/10.32508/stdj.v11i10.2707
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