Effect of textured DLC coatings on tribological properties of titanium alloy under grease lubrication

AbstractDiamond-like carbon (DLC) and graphite-like carbon (GLC) coatings have good prospects for improving the surface properties of engine parts. However, further understanding is needed on the effect of working conditions on tribological behaviors. In this study, GLC and two types of DLC coatings were deposited on GCr15 substrate for investigation. The friction and wear properties of self-mated and steel-mated pairs were evaluated. Two temperatures (25 and 90 °C), three lubrication conditions (base oil, molybdenum dithiocarbamate (MoDTC)-containing oil, MoDTC+zinc dialkyldithiophosphate (ZDDP)-containing oil), and high Hertz contact stress (2.41 GPa) were applied in the experiments. The results showed that high temperature promoted the effect of ZDDP on steel-mated pairs, but increased wear under base oil lubrication. The increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO3 and β-FeMoO4. It was also found that in most cases, the tribological properties of self-mated pairs were better than those of steel-mated pairs.

Download Full-text

The influence of self-assembled monolayers on tribological properties of Si-DLC coatings

Surface Topography Metrology and Properties ◽

10.1088/2051-672x/ab4347 ◽

2019 ◽

Vol 7 (4) ◽

pp. 045006 ◽

Cited By ~ 3

Author(s):

M Cichomski ◽

A Kisielewska ◽

M Prowizor ◽

E Borkowska ◽

I Piwoński ◽

...

Keyword(s):

Tribological Properties ◽

Self Assembled Monolayers ◽

Dlc Coatings ◽

Assembled Monolayers ◽

Self Assembled

Download Full-text

Corrosion and bio-tribological properties of Ti(CN)x hard coating on titanium alloy by the pulsed plasma electrolytic carbonitriding process

Tribology International ◽

10.1016/j.triboint.2014.07.023 ◽

2015 ◽

Vol 82 ◽

pp. 543-550 ◽

Cited By ~ 9

Author(s):

Yongkun Qin ◽

Dangsheng Xiong ◽

Jianliang Li ◽

Rajneesh Tyagi

Keyword(s):

Titanium Alloy ◽

Tribological Properties ◽

Hard Coating ◽

Pulsed Plasma ◽

Plasma Electrolytic

Download Full-text

Tribological Properties of DLC Coatings in Helium

Tribology Letters ◽

10.1007/s11249-012-9982-z ◽

2012 ◽

Vol 47 (2) ◽

pp. 223-230 ◽

Cited By ~ 5

Author(s):

B. Podgornik ◽

J. Vižintin ◽

U. Borovšak ◽

F. Megušar

Keyword(s):

Tribological Properties ◽

Dlc Coatings

Download Full-text

Tribological properties of DLC coatings and comparison with test results: Development of a database

Materials Characterization ◽

10.1016/j.matchar.2006.12.008 ◽

2008 ◽

Vol 59 (2) ◽

pp. 151-161 ◽

Cited By ~ 45

Author(s):

M. Sedlaček ◽

B. Podgornik ◽

J. Vižintin

Keyword(s):

Tribological Properties ◽

Test Results ◽

Dlc Coatings

Download Full-text

THE TRIBOLOGICAL PROPERTIES OF THE Ti6Al4V ALLOY WITH NITROGEN ION IMPLANTATION

Tribologia ◽

10.5604/01.3001.0013.1434 ◽

2019 ◽

Vol 283 (1) ◽

pp. 37-47

Author(s):

Katarzyna PIOTROWSKA ◽

Paweł BARANOWICZ ◽

Joanna WYSOKIŃSKA-MISZCZUK ◽

Monika MADEJ ◽

Monika SKÓRA

Keyword(s):

Titanium Alloy ◽

Ion Implantation ◽

Tribological Properties ◽

Contact Angles ◽

Ti6al4v Alloy ◽

Surface Geometry ◽

Tribological Tests ◽

Ringer’S Solution ◽

Nitrogen Ions ◽

Titanium Alloy Ti6al4v

The article presents the analysis of the influence of ion implantation on the properties of titanium alloy used in biotribological systems. The object of the study was the titanium alloy Ti6Al4V implanted with nitrogen ions. Tribological model tests were carried out in combination with a sphere with Al2O3 – a Ti6Al4V alloy disc implanted with N+ ions. Experimental friction tests were carried out on pin-on-disc testers in conditions of technically dry conditions and in conditions of lubrication with the Ringer’s solution. The tests on the TRB tester were carried out in a swinging motion, while on the T-01 tester in a sliding movement. Friction coefficient and wear were determined for all tests. Surface morphology testing and chemical composition analyses were performed using the Jeol JSM-7100F scanning electron microscope, equipped with an EDS microanalyzer. Surface geometry measurements prior to and after tribological tests were performed on a Taylor Hobson’s Talysurf CCI contactless optical profilometer. The optical tensiometer was used to determine the contact angles with demineralized water and Ringer’s solution. The tribological tests of the titanium alloy Ti6Al4V lead to the conclusion that implantation of N+ ions results in better tribological properties of the alloy. The best tribological characteristics were obtained for a titanium alloy implanted with nitrogen ions under technically dry friction conditions. The influence of the tribological system on Ringer’s fluid influenced the reduction of coefficients of friction in the oscillating movement (Tribometer TRB) and sliding motion (Tester T-01M). In the case of a oscillating movement, higher wear of the tested friction pair was observed under friction conditions with the Ringer solution lubrication.

Download Full-text