Tribological behavior of silver films prepared on ceramic surfaces by ion-beam-assisted deposition
This study was undertaken to achieve low friction and low wear on ceramic materials by using adherent silver films prepared by ion-beam-assisted deposition (IBAD). In this deposition technique, low-energy ions are used to bombard the substrates and films before and during deposition to achieve better film-to-substrate adhesion, which is essential for improved tribological behavior. Cross-sectional transmission electron microscopy (XTEM) was used to investigate the grain morphology and the nucleation and growth characteristics of IBAD-silver films at film-substrate interfaces. A ball-on-disk tribometer was used to evaluate the friction and wear properties of the silver-coated ceramics. The XTEM studies indicated that the films exhibited an equiaxed grain structure with grain sizes ranging from 5 to 10 nm. Gaps and/or discontinuity were not detected at the interfaces, indicating that the silver films bond intimately to the alumina substrates. Tribological test results indicated that the wear of disks coated with IBAD-silver was unmeasurably low; wear of alumina balls was by factors of 10 to 50 lower than the wear of balls sliding against uncoated disks. The friction coefficient was one-half to one-third that of sliding pairs without IBAD-silver films. 29 refs., 12 figs., 2 tabs.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5481119
- Report Number(s):
- ANL/CP-72519; CONF-9109243-1; ON: DE91017306
- Resource Relation:
- Conference: 5. international conference on surface modification technologies, Birmingham (United Kingdom), 2-4 Sep 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
COATINGS
FRICTION
WEAR
SILVER
DEPOSITION
INTERFACES
ION BEAMS
SUBSTRATES
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
TRIBOLOGY
ZIRCONIUM OXIDES
ALUMINIUM COMPOUNDS
BEAMS
CHALCOGENIDES
ELECTRON MICROSCOPY
ELEMENTS
FILMS
METALS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies