Structural Characteristics and Tribological Properties of Ti-Al-Cr-(Si)-C-N Nanocomposite Films Coated on the Spk 1.2080 Tool Steel Using Pvd Technique

In the present work, structural characteristics and tribological properties of ti-al-cr-(si)-c-n nanocomposite films coated on spk 1.2080 tool steel by pvd technique have been investigated. the pvd coating process was carried out using ti (si) al and cral cathodes at 150 a current, 40 v bias and (ar)0.1(ch4)0.45(n2)0.45 gas mixture for 50 min. evaluations were conducted by om, fesem, afm, xrd, nano and micro-indenters, and pin-on-disk tribometer. the uniform films with an about 2.5 μm thickness and 11.7 and 9.5 nm crystallite size values were respectively formed on the ti-al-cr-c-n and ti-al-cr-(si)-c-n coated specimens. surface hardness of the ti-al-cr-c-n and ti-al-cr-si-c-n-coated samples was respectively obtained 8.7 and 10.8 gpa compared to 2.16 gpa for the un-coated substrate. roughness (rms), reduced modulus (e) and h/e ratio related to the si-incorporated film were respectively determined 4.6 nm, 477 gpa and 0.081 while the mentioned values were 9.7 nm, 364 gpa and 0.075 for the si-emptied film. tribological properties were significantly enhanced by both films particularly by the si-incorporated kind