Friction and Wear in Cryogenic Liquids for Composites of Phenolic and of Polytetrafluoroethylene of Various Particle Sizes and Concentrations.

Abstract

Experiments conducted with phenolic-PTFE (polytetrafluoroethylene) composites sliding against 440-C steel in liquid nitrogen and in liquid hydrogen showed that lubricating properties of phenolic can be improved by the addition of as little as 15 weight percent of PTFE. Experiments further showed that 15 weight percent PTFE of the 0.2- to 8-micron particle size gave the best results in both liquid nitrogen and in liquid hydrogen. Compressive-modulus and shear-strength tests at room temperature and in liquid nitrogen indicated that these properties were reduced by a factor of 2 to 3 by the addition of 15 weight percent PTFE.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1969
Accession Number
ADA309361

Entities

People

  • Donald W. Wisander
  • Lawrence P. Ludwig
  • Robert L. Johnson

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bearings
  • Composite Materials
  • Contracts
  • Films
  • Fluoropolymers
  • Friction
  • Glass Fibers
  • Liquid Hydrogen
  • Materials
  • Materials Testing
  • Mechanical Properties
  • Modulus Of Elasticity
  • Particle Size
  • Rocket Engines
  • Shear Strength
  • Tensile Strength
  • Tensile Testers

Readers

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