Environmental Factors in Degradation of MoS₂ Tribological Behavior

J.F. Curry*, B.A. Krick, T.F. Babuska, M.A. Wilson, M.A. Sidebottom, H.S. Luftman, N.C. Strandwitz, N. Argibay, M.E. Chandross

Material, Physical, and Chemical Sciences Center, Sandia National Laboratories, Albuquerque, NM, 87185, USA.

∗ Primary Presenter E-mail: jcurry@sandia.gov

The role of environment in the degradation of structure and tribological behavior in MoS2 coatings has been extensively studied over decades. This talk provides insight into the oxidation of MoS2 and how oxygen interacts with amorphous or ordered microstructures, via characterization by HS-LEIS and XPS. Simulations of these interactions in molecular dynamics are also presented. Additional studies shown elucidate on the role of adsorbed species on friction behavior as a function of time in a range of pressures down to UHV.

This work was funded by the Laboratory Directed Research and Development program at Sandia National Laboratories, a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.