EFFECTS OF REACTOR RADIATION ON FIVE HIGHTEMPERATURE SOLID-FILM LUBRICANTS.
Abstract
Nuclear reactor irradiation and laboratory testing were performed on five high-temperature solid-film lubricants (Midwest Research Institute, PbS + MoS2 + B2O3; NASA Lewis Research Center, CaF2 coating, Navy Aeronautical Materials Laboratory, MoS2 + graphite + sodium silicate; Almasol Corporation, Almasol SFD-810; and General Dynamics/Fort Worth, Dynalube). The specimens were exposed to an average gamma dose of 2.2 x 10 to 11th power ergs/gm(C) and associated neutrons of 5.2 x 10 to 16th power n/sq cm (E>2.9 Mev). The lubricants were applied by the developing agencies. Inconel-X was used as substrate material for all films; Timken standard test races were also used on the Midwest film. The Hohman A-6 wear tester was used for all wear-life measurements. Rub shoes were of Rex AAA; load, 110 lb per shoe; sliding speed, 128 ft/min; machine cutoff, automatic at mu = 0.4. Several test temperatures were investigated for each lubricant. Weibull plots and a ranking method were employed for data analysis. Reactor radiation had no significant effect on the wear life of the PbS + MoS2 + B2O3 or the CaF2 lubricants. However, detectable decreases in wear life were noted at 80F for Dynalube and at 900F for Almasol SFD-810. The wear life of MoS2 + graphite + sodium silicate suffered a decrease at 80F but improved at 600F and 1200F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1965
- Accession Number
- AD0613561
Entities
People
- R. H. Daniel
Organizations
- General Dynamics