In situ friction, wear and electrical contact resistance of precious metal alloys
An in situ friction, wear and electrical contact resistance pin-on-plate system has been assembled and installed in a scanning Auger microprobe. Friction coefficients and electrical contact resistance were measured continuously as wear progressed. The surface composition and the topography of a wear track were measured intermittently without exposure of the surface to contaminating environments or removal of the pin from the wear track. Experiments were completed with known and controlled gaseous contaminants in the ambient. For a palladium based alloy pin (ASTM B540) sliding on a gold based alloy plate (ASTM B541), three stages of wear have been identified. The composition of the prow was essentially that of plate material during the first two stages of wear but was a mixture of pin and plate materials during the third stage of wear. In a helium ambient high electrical contact resistance occurred concomitantly with a transition to the third stage of wear.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6730110
- Report Number(s):
- SAND-86-1849C; CONF-870510-1; ON: DE87001423
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AUGER ELECTRON SPECTROSCOPY
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELEMENTS
EQUIPMENT
FLUIDS
FRICTION
GASES
GOLD ALLOYS
GOLD BASE ALLOYS
HELIUM
NONMETALS
PALLADIUM ALLOYS
PALLADIUM BASE ALLOYS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE GASES
SPECTROSCOPY
WEAR