Tribological characteristics of MoS2–Nb solid lubricant film in different tribo-test conditions
✍ Scribed by Ihsan Efeoglu; Özlem Baran; Fatih Yetim; Sabri Altıntaş
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 985 KB
- Volume
- 203
- Category
- Article
- ISSN
- 0257-8972
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✦ Synopsis
MoS 2 coatings lose their lubricating properties through mechanisms that depend on atmospheric conditions. The tribological performance at the different atmospheres of MoS 2 solid lubricant films have been improved by the co-deposition of a small amount of metal. In this study, we investigated the tribological properties of MoS 2 co-sputtered with Nb. MoS 2 -Nb solid lubricant composite film was deposited on AISI 52100 steel substrates and silicon wafers by closed field unbalanced magnetron sputtering (CFUBMS). Composition, morphology and structure were analyzed by a variety of techniques including EDS, SEM, and XRD. The friction and wear properties of air, dry nitrogen, distillated water and oil were determined using pin-on disc tribo-tester. Friction coefficient (COF) and wear rate obtained in dry nitrogen as maximum and in oil as minimum. MoS 2 -Nb films exhibited one type of crystallite orientation and characteristic dense structure. Also there is a sign of the humidity sensitive NbS 2 phase which was displayed better lubricating properties in the humid air than in the dry nitrogen conditions.