Wear Rate and Friction Coefficient in Liquid Nitrogen and Hydrogen of Steel Sliding on Polymer Laminates (Various Fabrics and Polymers.
Abstract
Wear rates and coefficients of friction of polymer laminates were determined in environments of liquid nitrogen and liquid hydrogen. The polymers included PTFE (polytetrafluoroethylene), phenolic, epoxy, and melamine; the fabrics included glass, graphite, nylon, and cotton. The reference material used was not a laminate (80 percent PTFE, 15 percent glass fiber, and 5 percent graphite). Wear and friction experiments were conducted with a 3/16-inch- (4. 8-mm-) radius hemispherical rider sliding on a flat disk, which was rotated to produce sliding velocities of 2300 feet per minute (701 m/min). The 304 stainless-steel riders were under a 1- kilogram load against the polymer laminate disks. The results of this investigation indicated that the graphite-fabric phenolic laminate is a potentially useful material for sliding contact in liquid nitrogen and that glass-fabric PTFE and graphite-fabric PTFE laminates are potentially useful in both liquid nitrogen and liquid hydrogen. The wear rates and coefficients of friction of 304 stainless-steel riders against the laminates were appreciably lower in liquid nitrogen than in liquid hydrogen. p2
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- ADA307855
Entities
People
- Donald W. Wisander
- Robert L. Johnson
Organizations
- Glenn Research Center