Role of the Third Body in Life Enhancement of MoS2

Abstract

A lubrication replenishment process that accounts for the long life of MoS2 coatings worn heavily early in sliding is described and quantified. Reciprocating sliding of a steel ball against MoS2 coated flats was performed using a new test methodology called stripe testing to monitor wear evolution. Worn surfaces were characterized with optical (Nomarski) and Michelson (interference) microscopy, as well as energy dispersive X-ray spectroscopy. Two important third-bodies, the ball transfer films and compacted debris patches at track turnaround points, were identified. Material transfer between the track and ball surfaces acts as a reservoir of solid lubricant and plays an important role in sustaining lubricated sliding of MoS2. Dynamics of the process were inferred from measurements of third-body material loss and buildup on track and ball surfaces.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1996
Accession Number
ADA465344

Entities

People

  • I. L. Singer
  • K. J. Wahl

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Coatings
  • Deposition (Materials Processing)
  • Dynamics
  • Films
  • Friction
  • Lubricants
  • Lubrication
  • Materials
  • Measurement
  • Mechanical Properties
  • Microscopy
  • Sliding Contacts
  • Solid Lubricants
  • Thickness
  • X Ray Spectroscopy
  • X Rays

Readers

  • Life Cycle Cost Analysis
  • Thin Film Deposition Science.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).

Technology Areas

  • AI & ML