Temperature and Water Vapor Pressure Effects on the Friction Coefficient of Hydrogenated Diamondlike Carbon Films

Abstract

Microtribological measurements of a hydrogenated diamondlike carbon film in controlled gaseous environments show that water vapor plays a significant role in the friction coefficient. These experiments reveal an initial high friction transient behavior that does not reoccur even after extended periods of exposure to low partial pressures of H2O and O2. Experiments varying both water vapor pressure and sample temperature show trends of a decreasing friction coefficient as a function of both the decreasing water vapor pressure and the increasing substrate temperature. Theses trends are examined with regard to first order gas-surface interactions. Model fits give activation energies on the order of 40 kJ/mol, which is consistent with water vapor desorption.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2009
Accession Number
ADA555124

Entities

People

  • Ali Erdemir
  • N. Argibay
  • Osman L. Eryilmaz
  • Pamela L. Dickrell
  • W. Gregory Sawyer

Organizations

  • Argonne National Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Vapor Deposition
  • Coatings
  • Coefficients
  • Crystal Lattices
  • Environment
  • Friction
  • Heat Of Activation
  • Materials
  • Mechanical Properties
  • Partial Pressure
  • Steady State
  • Surface Temperature
  • Tribology
  • Vapor Deposition
  • Vapor Pressure
  • Vapors
  • Water Vapor

Readers

  • Combustion science or combustion engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).