Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: An in Situ TEM Study

Aleksander A. Tedstone, David J. Lewis, Rui Hao, Shi Min Mao, Pascal Bellon, Robert S. Averback, Christopher P. Warrens, Kevin R. West, Philip Howard, Sander Gaemers, Shen J. Dillon, Paul OBrien

Research output: Contribution to journalArticle

Abstract

Direct observations on nanopillars composed of molybdenum disulfide (MoS2) and chromium-doped MoS2 and their response to compressive stress have been made. Time-resolved transmission electron microscopy (TEM) during compression of the submicrometer diameter pillars of MoS2- and Cr-doped MoS2 (Cr: 0, 10, and 50 at %) allow the deformation process of the material to be observed and can be directly correlated with mechanical response to applied load. The addition of chromium to the MoS2 changed the failure mode from plastic deformation to catastrophic brittle fracture, an effect that was more pronounced as chromium content increased.

Original languageEnglish (US)
Pages (from-to)20829-20834
Number of pages6
JournalACS Applied Materials and Interfaces
Volume7
Issue number37
DOIs
StatePublished - Sep 23 2015

Keywords

  • antiwear films
  • in situ electron microscopy
  • transition metal dichalcogenides
  • tribology

ASJC Scopus subject areas

  • Materials Science(all)

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    Tedstone, A. A., Lewis, D. J., Hao, R., Mao, S. M., Bellon, P., Averback, R. S., Warrens, C. P., West, K. R., Howard, P., Gaemers, S., Dillon, S. J., & OBrien, P. (2015). Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: An in Situ TEM Study. ACS Applied Materials and Interfaces, 7(37), 20829-20834. https://doi.org/10.1021/acsami.5b06055