Reorientation of Randomly Oriented MoSxCoatings During Fretting Wear Tests
- Resource Type
- Authors
- W Lauwerens; Jean-Pierre Celis; Xiaoling Zhang; Jiawen He
- Source
- Tribology Letters. 17:607-612
- Subject
- Diffraction
Materials science
genetic structures
Friction force
Scanning electron microscope
Mechanical Engineering
Fretting
Surfaces and Interfaces
Tribology
behavioral disciplines and activities
Surfaces, Coatings and Films
Fretting wear
Mechanics of Materials
Transmission electron microscopy
biological sciences
Forensic engineering
Composite material
Coefficient of friction
- Language
- ISSN
- 1023-8883
The reorientation of as-deposited randomly oriented sulphur-deficient MoSx coatings during fretting wear tests has been investigated by X-ray diffraction (XRD), Scanning Electron Microscope and Transmission Electron Microscope. The driving force for the reorientation seems to be the plastic deformation induced by the tangential friction force during fretting tests. The evolution from an as-deposited randomly orientation into a basal one occurs above a threshold normal load and fretting frequency. This reorientation results in a lowering of the coefficient of friction as well as in a high resistance to humidity, but unfortunately a high wear rate is noticed. The effect of normal load and fretting frequency on that reorientation process in MoSx coatings is discussed.