期刊
APPLIED SURFACE SCIENCE
卷 585, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.152501
关键词
Stick-slip; Topographies; Stability; Friction; Wear
类别
资金
- National Natural Science Foundation of China [52075225]
- Science and Technology Planning Social Development Project of Zhenjiang City (CN) [ZD2020004]
The influence of different surface topography types on stick-slip behavior was investigated. Micro-dimple textures inhibit stick-slip behavior by trapping wear debris and forming effective oil film, while micro-bulge textures reduce contact area and thus decrease the propensity of stick-slip behavior.
Stick-slip behavior, a common problem of contact under severe lubrication, is closely related with surface topography. To investigate the influence of surface topography types on stick-slip behavior, micro-dimple and micro-bulge textures, typical concave and convex topographies, were fabricated by pulse picosecond laser and CW fiber, respectively. A gyroscope sensor was mounted on the pin-on-disc modular of multifunctional tribometer to conduct friction dynamics tests. The intensity of stick-slip behavior is characterized by the amplitude and duration of stick-slip behavior. The results show that, under the same starved lubrication, the micro-bulge textured disc showed the lowest intensity while the untextured one showed the highest intensity. In comparison with micro-dimple and micro-bulge textured disc exhibits higher efficiency in inhibiting stick-slip behavior as well as starting stable sliding. The mechanism of inhibiting stick-slip behavior for micro-dimple textures is generated by trapping wear debris and forming effective oil film. However, the cause of micro-bulge textures is the reduced contact area, which result in the reduction of the propensity of secondary plateaus, plastic flow, and adhesive junctions between asperities.
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