Polymer Science Faculty Research
Title
Layered atomic structures of silver vanadate compounds for low shear strength at high temperatures
Document Type
Article
Publication Date
Spring 2010
Abstract
The aerospace industry has been a strong driving force for the creation of new and effective wear-resistant and lubricious materials at high temperatures (T > 500 \r{ }C). Solid lubricants (SLs) such as graphite and molybdenum disulfide oxidize and, hence, degrade rapidly at T > 350 \r{ }C. The selection of oxides is a clear viable alternative for the choice of SLs when confronting the problem of oxidation. Double metal oxides of the form MexTMyOz, where Me is a noble metal and TM a transition metal, were found to exhibit relatively low coefficients of friction in the 500 to 700 \r{ }C range (μ = 0.1-0.3) . Very recently, our group has undertaken to understand the friction properties of a silver vanadate, which was shown to be an effective lubricant up to 1000 \r{ }C. We show, using \textit{ab-initio }calculations within the density functional theory framework, that the layered atomic structure of silver vanadate with weak inter-planar bonds that facilitate sliding, resulted in a low coefficient of friction.
Volume
55
Recommended Citation
Tsige, Mesfin, "Layered atomic structures of silver vanadate compounds for low shear strength at high temperatures" (2010). Polymer Science Faculty Research. 389.
https://ideaexchange.uakron.edu/polymerscience_ideas/389