Cryotribology of diamond and graphite
- Francis Bitter Magnet Lab., Cambridge, MA (United States)
An experimental study was carried out on the tribological behavior of materials of interest in cryogenic applications, focusing on diamond and graphite. Both natural diamond (referred in the text as diamond) and chemical-vapor-deposition (CVD) diamond (CVD-diamond) were used. The experiment was carried out using a pin-on-disk tribometer capable of operating at cryogenic temperatures, from 4.2 to 293 K. Two basic scenarios of testing were used: (1) frictional coefficient ({mu}) vs velocity (v) characteristics at constant temperatures; (2) {mu} vs temperature (T) behavior at fixed sliding speeds. For diamond/CVD-diamond, graphite/CVD-diamond, stainless steel/CVD-diamond pairs, {mu}`s are virtually velocity independent. For each of diamond/graphite, alumina/graphite, and graphite/graphite pairs, the {partial_derivative}{mu}/{partial_derivative}v characteristic is favorable, i.e., positive. For diamond/CVD-diamond and graphite/CVD-diamond pairs, {mu}`s are nearly temperature independent between in the range 77 - 293 K. Each {mu} vs T plot for pin materials sliding on graphite disks has a peak at a temperature in the range 100 - 200 K.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- OSTI ID:
- 415061
- Report Number(s):
- CONF-9605186-; ON: DE96015339; TRN: 96:005794-0010
- Resource Relation:
- Journal Volume: 37; Journal Issue: 12; Conference: 14. symposium on energy engineering sciences: mechanical sciences, Argonne, IL (United States), 15-17 May 1996; Other Information: PBD: [1996]; Related Information: Is Part Of Proceedings of the fourteenth symposium on energy engineering sciences: Mechanical sciences: Solids and fluids; PB: 226 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cryotribology: Development of cryotribological theories and application to cryogenic devices. Interim report, June 15, 1985--August 31, 1992
Cryotribology: Development of cryotribological theories and application to cryogenic devices