Layered Atomic Structures of Double Oxides for Low Shear Strength at High Temperatures

Author(s)

D'Arcy S. Stone, Southern Illinois University Carbondale
Jia Liu, Southern Illinois University Carbondale
Dinesh P. Singh, Southern Illinois University Carbondale
Christopher Muratore, University of DaytonFollow
Andrey A. Voevodin, Air Force Research Laboratory
Sanjay Mishra, University of Memphis
Claus Rebholz, University of Cyprus
Qingfeng Ge, Southern Illinois University Carbondale
Samir M. Aouadi, University of North Texas

Document Type

Article

Publication Date

5-2010

Publication Source

Scripta Materialia

Abstract

Double oxide phases combining a transition metal and a noble metal have recently become a subject of investigation as solid lubricant materials for high-temperature tribological applications. Here, we study the changes in chemistry and crystal structure of silver molybdate (Ag₂Mo₂O₇) and silver tungstate (Ag₂WO₄) thin films and powders from 25 to 600 °C. We show, using ab initio molecular dynamics, high-temperature X-ray diffraction, high-temperature Raman spectroscopy and differential scanning calorimetry in combination with sliding tests, that the layered atomic structure of silver molybdate facilitates sliding, resulting in a low coefficient of friction (<0.2) from 300 to 500 °C.

Inclusive pages

735–738

ISBN/ISSN

1359-6462

Comments

Permission documentation is on file.

Copyright

Copyright © 2010, Elsevier

Publisher

Elsevier

Volume

62

Peer Reviewed

yes

Issue

10

eCommons Citation

Stone, D'Arcy S.; Liu, Jia; Singh, Dinesh P.; Muratore, Christopher; Voevodin, Andrey A.; Mishra, Sanjay; Rebholz, Claus; Ge, Qingfeng; and Aouadi, Samir M., "Layered Atomic Structures of Double Oxides for Low Shear Strength at High Temperatures" (2010). Chemical and Materials Engineering Faculty Publications. 140.
https://ecommons.udayton.edu/cme_fac_pub/140