Effects of Interfacial Bonding on Friction and Wear at Silica/Silica Interfaces
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11249_2014_Article_425.pdf
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2.14 MB
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Checksum (MD5)
0482a69d9f634c6461c8d4cd07154ec9
Author(s)
Li, Ao
Szlufarska, Izabela
Liu, Y.
Date Issued
October 2014
Journal
Tribology Letters
Publisher
Springer US
Citation
Li, Ao et al. “Effects of Interfacial Bonding on Friction and Wear at Silica/Silica Interfaces.” Tribology Letters 56.3 (2014): 481–490
Version
Author's final manuscript
Abstract
Static friction between amorphous silica surfaces with a varying number of interfacial siloxane (Si–O–Si) bridges was studied using molecular dynamic simulations. Static friction was found to increase linearly with the applied normal pressure, which can be explained in the framework of Prandlt–Tomlinson’s model. Friction force was found to increase with concentration of siloxane bridges, but with a decreasing gradient, with the latter being due to interactions between neighboring siloxane bridges. In addition, we identified atomic-level wear mechanisms of silica. These mechanisms include both transfer of individual atoms accompanied by breaking interfacial siloxane bridges and transfer of atomic cluster initialized by rupturing of surface Si–O bonds. Our simulations showed that small clusters are continually formed and dissolved at the sliding interface, which plays an important role in wear at silica/silica interface.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s11249-014-0425-x
