Accession Number:
ADA257218
Title:
Structural and Tribological Studies of MoS sub 2 Solid Lubricant Films Having Tailored Metal-Multilayer Nanostructures
Descriptive Note:
Technical rept.
Corporate Author:
AEROSPACE CORP EL SEGUNDO CA MECHANICS AND MATERIALS TECHNOLOGY CENTER
Personal Author(s):
Report Date:
1991-12-15
Pagination or Media Count:
33.0
Abstract:
Molybdenum disulfide MoS2 solid lubricant films were prepared by rf magnetron sputtering on 440C steel, 52100 steel, and Si substrates. This study concentrated on films that were multilayer coatings of MoS2 with either Ni or Au-Pd20 metal interlayers. Multilayer thickness ranged from 0.2 nm to 1.0 run while the multilayer periodic spacing ranged from 3 to 10 nm. Scanning electron microscopy and X-ray diffraction revealed that the multilayer films had dense microstructures that, in some cases, exhibited significant orientation of their basal planes parallel to the substrate. Film endurance was assessed in sliding contact by using thrust washer tests and in rolling contact by using thrust bearing tests. Some film microstructures exhibited excellent endurance. Brale indentation indicated that the metal layers can improve film fracture toughness. Friction in air and ultra-high vacuum UHV was investigated using a UHV compatible test apparatus. Friction coefficients between 0.05 and 0.08 were measured in UHV.
Descriptors:
- *METALS
- *FILMS
- *MOLYBDENUM
- *SOLID LUBRICANTS
- SCANNING
- THICKNESS
- LAYERS
- TOUGHNESS
- SOLIDS
- STEEL
- BEARINGS
- NICKEL
- SILICON
- COEFFICIENTS
- DIFFRACTION
- ELECTRONS
- COATINGS
- ELECTRON MICROSCOPY
- MICROSCOPY
- HIGH VACUUM
- MAGNETRONS
- THRUST BEARINGS
- SLIDING CONTACTS
- SLIDING
- TRIBOLOGY
- SULFIDES
- PALLADIUM
- LUBRICANTS
- THRUST
- SPUTTERING
- FRICTION
- GOLD
- X RAYS
- SUBSTRATES
- X RAY DIFFRACTION
- VACUUM
- STRUCTURAL ANALYSIS
- AIR
- TEST AND EVALUATION
Subject Categories:
- Physical Chemistry
- Coatings, Colorants and Finishes
- Metallurgy and Metallography
- Lubricants and Hydraulic Fluids