Micro-Tribological Performance of MoS2 Lubricants with Varying Au Content

Abstract

Microtribological testing with a spherical diamond tip {radius = 100 pm) was conducted on two AU-M0S2 coatings with 32 at.% and 84 at.% Au. For lower loads (0.2 to 2.0 mN), the performance of both coatings was similar, with minimal wear (<50 nm depth) and relatively stable friction coefficients. At higher loads (3,0- 5.0 mN), similar trends were found for the 84 at.% Au specimen, but the 32 at,% Au sample wore severely and the friction became unstable. Non-linear curve fitting of friction coefficient versus normal load was conducted using a model containing an elastic (Hertzian) term and a plastic (plowing) term. Changes in the two contributions to the friction with time were used to explain the differences in performance observed between the two coatings,

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Document Details

Document Type
Technical Report
Publication Date
Feb 05, 2011
Accession Number
ADA634599

Entities

People

  • J. Z. Fishman
  • Jeffrey R. Lince
  • Pantcho Stoyanov
  • Richard R Chromik

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Coefficients
  • Curve Fitting
  • Engineering
  • Friction
  • Lubricants
  • Lubrication
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Mechanical Properties
  • Microelectromechanical Systems
  • Modulus Of Elasticity
  • Solid Lubricants
  • Steady State
  • Stresses
  • Yield Strength

Readers

  • Computational Modeling and Simulation
  • Thin Film Deposition Science.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).