Coefficient of Friction Measurement in the Presence of High Current Density

Abstract

On the micro-scale, armature rail interface contact is accomplished through surface asperity interaction. In this imperfect contact model (a version of the Bowden-Tabor model), we postulate the coexistence of one or more contact regimes, such as solid solid contact, liquid metal lubricated contact, and arcing contact. We are developing microscopic models and experimental apparatus to study this postulate. This work in particular describes the experimental apparatus developed to assist in the investigation of possible contact regimes and presents preliminary data that indicate a possible decrease in coefficient of friction in the presence of high current density when compared to a no-current condition.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2006
Accession Number
ADA476178

Entities

People

  • Duanyang Xu
  • K. Ravi-chandar
  • Lemuel A. Brown
  • S. Satapathy

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Coefficients
  • Current Density
  • Data Acquisition
  • Detectors
  • Electrical Resistance
  • Electron Microscopy
  • Frequency
  • Friction
  • Materials
  • Measurement
  • Metals
  • Microscopes
  • Optical Detectors
  • Power Supplies
  • Resistance
  • Scanning Electron Microscopy
  • United States Naval Academy

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Materials Science and Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).