On the Self-Repair of WS2/a-C Tribocoating

被引：11
作者：
Cao, Huatang [1 ]
Wen, Feng [1 ,2 ]
De Hosson, Jeff Th. M. [3 ]
Pei, Yutao [1 ]
机构：
[1] Univ Groningen, Dept Adv Prod Engn, Engn & Technol Inst Groningen, Nijenborgh 4, NL-9747 AG Groningen, Netherlands
[2] Hainan Univ, Sch Mat Sci & Engn, Haikou 570228, Hainan, Peoples R China
[3] Univ Groningen, Zernike Inst Adv Mat, Dept Appl Phys, Nijenborgh 4, NL-9747 AG Groningen, Netherlands
来源：
ADVANCED MATERIALS INTERFACES | 2020年 / 7卷 / 01期
关键词：
basal plane reorientation; damage self-healing; magnetron sputtering deposition; ultralow friction; WS2; a-C tribocoating; TRIBOLOGICAL PROPERTIES; NANOCOMPOSITE COATINGS; WEAR MECHANISMS; FRICTION; WS2; MOS2; PERFORMANCE; SURFACES; HARD; TRIBOPERFORMANCE;
D O I：
10.1002/admi.201900938
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This study investigates the self-healing capacity of a WS2/amorphous carbon (a-C) tribocoating. It is found that prenotches up to 45 mu m wide in the WS2/a-C coating surface can be completely healed under the stimulus of sliding operations. The in situ tribotest of 100, 500, 2000, and 6000 laps confirms a dynamic filling of tribofilms that patch the voids and prenotched damages. The stabilized coefficient of friction (CoF) remains at an ultralow value down to 0.02, independent of the prenotched damage at the top of coating. The sites of notched damage in fact act as lubricant reservoirs to accumulate the otherwise "wasted" debris, which are restored as a superlubricant by the sliding operation. High resolution transmission electron microscopy reveals that WS2 (002) nanoplatelets in the healed notch are parallel to the top coating surface but conformal to the coating/notch interface. The patchy tribofilm holds excellent promise for the self-repair of damages in the field of tribology.
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页数：15
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