Tribology and mechanical properties of excimer laser mixed Ti--Si--C surface alloys
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)
We have examined the wear and friction and surface hardness of the mixed phase Ti--Si--C alloy formed by excimer laser surface processing of Ti layers on SiC substrates. The friction between a ruby pin and the mixed surface shows a complex behavior depending on relative humidity, a behavior clearly moderated by the chemistry of the interface between the sliding pin and the surface. The friction is sometimes much lower and sometimes comparable to that between the ruby pin and the unalloyed substrate. Wear in the unalloyed case is characterized by fatigue fracture and flaking of the SiC surface which leads to abrasive wear of the ruby pin. In the alloyed case, a transfer film forms and even in the worst case, a smooth wear track results in the alloy and the pin is undamaged. The surface hardness is intermediate between that of the SiC and the unalloyed Ti surface layer. The wear results are understood in terms of changes in the grain boundary structure of the surface induced by the laser alloying process.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5734356
- Journal Information:
- Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:1; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
Similar Records
Excimer laser processing of tool steel: Tribological effects of multiple pulse processing and titanium alloying
Tribology and surface mechanical properties of excimer laser nitrided titanium
Related Subjects
360603* -- Materials-- Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FAILURES
FATIGUE
FRACTURES
FRICTION
GRAIN BOUNDARIES
HARDNESS
INFORMATION
MECHANICAL PROPERTIES
MICROSTRUCTURE
NUMERICAL DATA
SILICON ALLOYS
SILICON CARBIDES
SILICON COMPOUNDS
SURFACE PROPERTIES
TITANIUM ALLOYS
TRIBOLOGY
WEAR