Comparison of the film property with prior DLC film

 
Tough Carbon film
DLC film
(Plasma CVD)
  Hardness
Hv 5000 [kg/mm2]
Hv 1500~3000 [kg/mm2]
  Thermal stability
500℃(O2 free atmosphere)
200℃
  Process temp.
below 100℃
above 200℃
  Contents of
  diamond elements
high
low
  Density
high
low
  Wear loss
1×10-7 [ mm3/Nm ]
3×10-7 [mm3/Nm]
  Young's modulus
270 [GPa]
140 [GPa]
  Adhesion
100 [N] 70 (substrate；WC)
70 (substrate；WC)
  Surface roughness
Ra < 0.5 [nm]
Ra < 0.5 [nm]
  Element
Only Carbon (Hydrogen free)
Carbon＋Hydrogen
  Friction   coefficient
0.1（in air）
0.1（in air）
  Transparency
of infrared rays
transparency
transparency
  Refractive index
2.30-2.35
2.30
  Contact angle
80º
70º

 

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