Investigating the structure, adhesion and tribological properties of Al and Zr-doped TiN coatings with various substrate bias voltage and working pressure

Abstract

In this study, TiAlZrN films were coated on the hardened 1.2344 (X 40 CrMoV 5 1) steels using DC power supplied closed field unbalanced magnetron sputtering (CFUBMS) technique. Structural investigations of coatings were carried out using scanning electron microscope and X-ray diffraction. The thickness of coatings was measured from the cross-sectional scanning electron microscope images, and the grain size value and residual stress were calculated by using X-ray diffraction data in the Scherrer formula. Nano indentation method was used to investigate the surface hardness for reducing the substrate effect due to very thin coating thickness (∼2–3 µm). Scratch test was performed for determining the adhesion strength of the coatings. As a tribo-test, a ball-on-disk system was used. From the results, it was understood why TiAlZrN coatings were attractive. The highest hardness was observed as 50.67 GPa, and the highest scratch resistance was reached to 56 N. Also, it was determined that the coating having the highest tribological properties (5.46 × 10−5 mm3/Nm) increased the wear resistance of the substrate six times (3.06 × 10−4 mm3/Nm).

Investigation of the friction and wear properties of nitrided 7075-T6 aluminum alloy under vacuum and ambient air

“…At the beginning of the tests, all samples show a rapid increase in the friction coefficient due to Hertzian contact [31], [32]. Subsequently, the friction coefficients achieve stability in different durations, regimes, and values.…”

The Effect of Al and Ti Transition Metals on the Wear Resistance of Ceramic Based CrN Coatings; Investigation under Ambient Air and Vacuum Conditions

“…The density of the grain boundaries, which increases with the decrease in crystallite size, improves hardness by preventing the dislocation motion. 47 The superior hardness of CrTiAlN coatings compared to CrN can be attributed to the precipitation of Ti, which has 30% in its structure at the grain boundaries. As seen from the AFM images (Figure 2), there was a wavy surface in the CrAlN coating.…”

Dövme Kaliplarinda Aşinma Mekani̇zmalari

“…Literatür incelendiğinde, TiAlN kaplamalara son yıllarda eklenen bir diğer geçiş metali zirkonyumdur. Sert ve çalışma arkadaşlarının gerçekleştirdiği bir çalışmada, dövme kalıplarında da yaygın bir şekilde kullanılan AISI H13 kalıp çeliği yüzeyine kaplanan TiAlZrN kaplamalar sayesinde, malzeme sertliğinin çarpıcı bir şekilde arttığı, aşınma dayanımının ise taban malzemeye göre yaklaşık 10 kat iyileştiği belirlenmiştir [73].…”