EFFECTS OF REACTOR RADIATION ON FIVE HIGHTEMPERATURE SOLID-FILM LUBRICANTS.
Final rept. for 1 Oct 63-30 Sep 64,
GENERAL DYNAMICS/FORT WORTH TEX
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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 DynamicsFort Worth, Dynalube. The specimens were exposed to an average gamma dose of 2.2 x 10 to 11th power ergsgmC and associated neutrons of 5.2 x 10 to 16th power nsq cm E2.9 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 ftmin 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