Title

Molybdenum Disulfide as a Lubricant and Catalyst in Adaptive Nanocomposite Coatings

Author(s)

Christopher Muratore, University of DaytonFollow
Andrey A. Voevodin, Air Force Research Laboratory

Document Type

Article

Publication Date

12-2006

Publication Source

Surface and Coatings Technology

Abstract

Nanocomposite YSZ–Ag–Mo–MoS₂ coatings with different MoS₂ additions (0–100 at.%) were deposited with a hybrid pulsed laser/magnetron sputtering/filtered cathodic arc process. Wear testing was performed from 25 to 700 °C for each of the coatings. Electron microscopy and other characterization techniques were used to examine the surfaces and wear tracks of the coatings and to determine the mechanisms resulting in the measured tribological properties. Adaptive coatings containing 8 at.% MoS₂demonstrated a friction coefficient of 0.2 throughout the temperature range examined here, compared to 0.4 for YSZ–Ag–Mo with no MoS₂. Characterization of the YSZ–Ag–Mo–8% MoS₂ coating revealed that MoS₂ and silver provided lubrication at temperatures ≤ 300 °C, while silver molybdate phases and MoO₃ were effective lubricants at higher temperatures. Silver molybdate was not observed in the coatings containing 0% MoS₂. The role of sulfur in the formation of silver molybdate is briefly discussed.

Inclusive pages

4125–4130

ISBN/ISSN

0257-8972

Comments

Permission documentation is on file.

Copyright

Copyright © 2006, Elsevier

Publisher

Elsevier

Volume

201

Peer Reviewed

yes

Issue

7

eCommons Citation

Muratore, Christopher and Voevodin, Andrey A., "Molybdenum Disulfide as a Lubricant and Catalyst in Adaptive Nanocomposite Coatings" (2006). Chemical and Materials Engineering Faculty Publications. 159.
https://ecommons.udayton.edu/cme_fac_pub/159