Investigation of Third Body Processes by In Vivo Raman Tribometry (Preprint)

Abstract

A Raman tribometer has been used to study third body processes and friction during sliding against two low friction coatings: annealed boron carbide and Mo-S-Pb, a MoS2-based coating. Reciprocating sliding tests were performed in either dry or humid air with transparent hemispheres (glass or sapphire) loaded against the coatings. Videos and Raman spectra of the sliding contact were recorded during the tests. For annealed boron carbide, friction was controlled by a mix of H3BO3 and carbon; for amorphous Mo-S-Pb, friction was controlled by MoS2 generated by sliding. Friction changes in the former were correlated to the relative amount of the two materials; in the latter, the rise in friction was ascribed to a change in interfacial shear strength of MoS2, inferred from the deformation of transferred debris particles. For both coatings, interfacial sliding was the dominant mode of velocity accommodation in the sliding interface.

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Document Details

Document Type
Technical Report
Publication Date
Jun 14, 2000
Accession Number
ADA465339

Entities

People

  • Irwin L. Singer
  • Kathryn Wahl
  • S. D. Dvorak

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Bodies
  • Boron Carbides
  • Carbides
  • Chemistry
  • Friction
  • Hemispheres
  • Lubricants
  • Materials
  • Mechanical Engineering
  • Molecular Orbital Theory
  • Particles
  • Raman Spectra
  • Sapphire
  • Shear Strength
  • Sliding Contacts
  • Spectra
  • Spectroscopy

Readers

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

Technology Areas

  • AI & ML