In situ ultrahigh vacuum friction measurement and wear track analysis of ion implanted 304 stainless steel
The dual ion implantation of Ti and C into 304 stainless steel has been found to reduce friction and wear in uhv. The implantation treatment producting this result, 4.6 x 10/sup 17/ Ti/cm/sup 2/ (180 keV) followed by 2.0 x 10/sup 17/ C/cm/sup 2/ (50 keV), produced TiC precipitates dispersed in an amorphous surface layer. Friction and wear track compositions were measured in situ with a scanning Auger microprobe without removing the pin from the track. This treatment decreased the friction coefficient from 1.2 to 0.6 to 0.8 and the wear track width from 342 ..mu..m after 1000 cycles. Relative to unimplanted 304, wear tracks formed in uhv and air on implanted 304 had more N and less C, with O and the metallic elements similar in concentration, in addition to the presence of Ti. Friction coefficients measured in air were less than those in uhv; track composition suggests that oxides or adsorbed moisture (and perhaps hydrocarbons) helped lower the friction in air. 22 refs., 3 figs., 1 tab.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5681555
- Report Number(s):
- SAND-87-1607C; CONF-871124-25; ON: DE88004537
- Resource Relation:
- Conference: Fall meeting of the Materials Research Society, Boston, MA, USA, 30 Nov 1987; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEEL-304
FRICTION
ION IMPLANTATION
WEAR
AIR
AUGER ELECTRON SPECTROSCOPY
CARBON IONS
CHEMICAL COMPOSITION
CRYSTALLIZATION
FILMS
HELIUM IONS
MEASURING METHODS
MICROSTRUCTURE
PRECIPITATION HARDENING
SURFACE PROPERTIES
TITANIUM CARBIDES
TITANIUM IONS
ULTRAHIGH VACUUM
YIELD STRENGTH
ALLOYS
CARBIDES
CARBON COMPOUNDS
CHARGED PARTICLES
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELECTRON SPECTROSCOPY
FLUIDS
GASES
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IONS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
PHASE TRANSFORMATIONS
SPECTROSCOPY
STAINLESS STEELS
STEELS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360106* - Metals & Alloys- Radiation Effects
360103 - Metals & Alloys- Mechanical Properties