Areas of application
Tool making, machine and mold construction, machining of aluminum

  • Low coefficient of friction
  • Excellent wear protection
  • Extreme hardness
  • Excellent oxidation resistance
  • Brilliant look


TT®-DLC is a metal-free diamond-like layer of carbon and is deposited at low temperatures using the PACVD process. The combination of good wear-resistance and outstanding frictional and non-stick properties makes TT®-DLC coatings an ideal surface treatment for components and tools subject to high frictional forces./p>


TT®-C-DLC coatings are a sub-group of the amorphous, diamond-like carbon coatings (DLC – Diamond-
Like Carbon). Unlike the majority of the commercially available TT®-DLC coatings, they are not deposited
from gaseous hydrocarbons (e.g. acetylene or methane) using the plasma-activated CVD process
(PACVD – Plasma Assisted Chemical Vapor Deposition).

TT®-C-DLC coatings can achieve both a higher hardness and a lower coefficient of friction than the TT®-
DLC coatings deposited by the PACVD process. The properties of TT®-C-DLC coatings are summarized in
the table.

TT®-C-DLC coatings are normally deposited with a thickness of 1.5 ± 0.5 μm. Because of their properties,
these coatings are often used for standard components.


TT®-ta-C coatings are a sub-group of the amorphous, diamond-like carbon coatings (DLC – Diamond-Like Carbon).

TT®-ta-C is a tetahedral, amorphous, hydrogen-free carbon coating that is extracted from fixed carbon (graphite) by means of laser arc technology (PVD process).

Coating structure:

Hydrogen-free, tetahedral, amorphous carbon, sp³ content adjustable above 85 %


4500–7000 HV, adjustabl


300–450 GPa, adjustabl

Coefficient of friction:

0.05–0.10 (dry on steel)

Wear coefficient:

1*10-8 mm³/Nm (dry on steel)

Temp. resistance:

400– 500°C in air, <800°C in vacuum

Coating thickness:

0.1–4.0 μm