Some Effects of Composition on Friction and Wear of Graphite-Fiber-Reinforced Polyimide Liners in Plain Spherical Bearings

Abstract

Oscillating, plain spherical bearings with graphite-fiber-reinforced polyimide (GFRPI) liners were tested for friction and wear from 25 deg to 315 deg C. A condensation polymer was compared with an addition polymer, and a high-modulus fiber was compared with a lower cost, low-modulus fiber. All polymer-fiber combinations gave friction coefficients from 0.05 to 0.18 and low wear. Adding CdO and CdI2 reduced the wear of degassed bearings in dry air. These additives were not needed when the bearing liners contained adsorbed moisture. Although, at 25 deg C, MoS2 reduced the friction and wear of the base composite at unit loads above 7.0x10(exp 7) N/m2 (10,000 psi), it had no beneficial effect at lighter loads.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA330163

Entities

People

  • Harold E. Sliney
  • Thomas P. Jacobson

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Carbon Fiber Reinforced Polymer
  • Carbon Fibers
  • Composite Materials
  • Fiber Reinforced Polymers
  • Friction
  • Graphitic Materials
  • Lubricants
  • Lubrication
  • Materials
  • Materials Processing
  • Plastics
  • Polyimide Resins
  • Polymer Matrix Composites
  • Reinforced Plastics
  • Resins
  • Solid Lubricants

Fields of Study

  • Materials science

Readers

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