LUBRICATING PROPERTIES OF CERAMIC-BONDED CALCIUM FLUORIDE COATINGS ON NICKEL-BASE ALLOYS FROM 75 DEGREES TO 1900 DEGREES F
Abstract
A detailed investigation was conducted of the effects of sliding velocity, temperature, load, and modifications in coating procedure on the endurance life and the friction properties of CaF2 coatings. The lubricating properties of ceramic-bonded CaF2 on several Ni base alloys were determined at ambient temperatures from 75 to 1900 F, sliding velocities from 430 to 5200 fpm, and loads of 1000 and 2000 grams. The specimen configuration was 3/16-in-radius hemisphere sliding against the flat surface of a rotating disk. Modifications in coating procedures studied were preoxidation of the base metal, treatment of the coating after application to the metal, and control of coating thickness. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1962
- Accession Number
- AD0271899
Entities
People
- Harold E. Sliney
Organizations
- National Aeronautics and Space Administration