The tribological tests were performed on a SRV[R] tribometer
(Optimol Instruments Pruftechnik GmbH, Germany) under reciprocating sliding conditions using a point contact with the test parameters given in Table 1.
Friction coefficient and wear rate were determined by the method "ball on disk" using Tribometer
Figure 11 shows the friction coefficients of Cr-Cu-N coatings with various Cu content against an [Al.sub.2][O.sub.3] ball on a ball-on-disk tribometer
under a normal load of 2 N as a function of sliding distance at room temperature.
(f) Four-ball (4-ball) tribological test instrument: tests were conducted on a model KTR-30L 4-ball tribometer
(Koehler Instrument Company, Bohemia, NY), equipped with TriboDATA software (Koehler Instrument Company, Bohemia, NY).
The coefficient of friction was determined on a pin-on-disc tribometer
equipped with a 100Cr6 steel ball of 6 mm diameter.
cradle is rotatable mounted on the holder fixed on the dynamometer, which is bolted to the longitudinal traction support of the lathe (Fig.
 dispersed with tribometer
and Four- graphite and MWCNTs ball tester in concentration 0.1 to 0.6 Wt%.
The tribological properties of the coatings were evaluated using a reciprocating-type ball-on-disc tribometer
(JLTB-02, J&L Tech Co.
Cheng, "Evaluation on wear behavior of Cr-Ag-N and Cr-W-N PVD nanocomposite coatings using two different types of tribometer
," Surface and Coatings Technology, vol.
, a sophisticated device, is used to clarify the friction coefficient ([micro]T) from the nano-, micro-, and macroscopic texture of a surface .