Wear and Friction of Various Polymer Laminates in Liquid Nitrogen and in Liquid Hydrogen.
Abstract
Wear and friction of polymer laminates were determined in liquid nitrogen and liquid hydrogen. Polymers included polytetrafluoroethylene (PTFE), phenol formaldehyde (phenolic), epoxy formaldehyde (epoxy), and melamine formaldehyde (melamine); fabrics included glass, graphite, cotton, and nylon. Wear and friction experiments were conducted with a 3/16-inch-radius hemispherically-tipped polymer laminate rider sliding on the flat surface of a rotating 304-stainless-steel disk. The sliding velocity was maintained at 2300 feet per minute. The polymer laminate riders were under a 1000-gram load against the disk. The results of the investigation indicate that a laminate of graphite fabric and phenolic resin is a potentially useful material for sliding contact in liquid nitrogen and that a laminate of glass fabric and PTFE resin is useful in liquid hydrogen. (The mechanical strengths of these materials were not evaluated.) Wear and friction of the laminates were appreciably higher in liquid hydrogen than in liquid nitrogen. p4
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- ADA307801
Entities
People
- Donald W. Wisander
- Lawrence P. Ludwig
- Robert L. Johnson
Organizations
- Glenn Research Center