High vacuum tribological performance of DLC-based solid–liquid lubricating coatings: Influence of atomic oxygen and ultraviolet irradiation

2013 ◽  
Vol 60 ◽  
pp. 36-44 ◽  
Author(s):  
Xiufang Liu ◽  
Liping Wang ◽  
Qunji Xue
Author(s):  
Dong shan Li ◽  
Ning Kong ◽  
Ruishan Li ◽  
Boyang Zhang ◽  
Yongshun Zhang ◽  
...  

Abstract Judicious selection of additives having chemical and physical compatibility with the DLC films may help improving the triboligical properties and durability life of DLC-oil composite lubrication systems. In this study, Cu nanoparticles were added to PAO6 base oil to compose a solid-liquid composite lubrication system with W-DLC film. The effects of nanoparticle concentration, test temperature and applied load on tribological performance were systematically studied by a ball-on-disk friction test system. The tribological results illustrated that Cu nanoparticles could lower the coefficient of friction (COF) and dramatically reduce the wear rates of W-DLC films. The optimal tribological behavior was achieved for the 0.1 wt.% concentration under 30 ℃ and the applied load of 100 N. The test temperature and applied load were vital influencing factors of the solid–liquid lubrication system. The bearing effect and soft colloidal abrasive film of spherical Cu nanoparticle contributed to the excellent tribological performance of the composite lubrication system under mild test conditions, meanwhile, the local delamination of W-DLC film and oxidation were the main causes of the friction failure under harsh test conditions. With test temperature and applied loads increase the degree of graphitization of the W-DLC film increased. In conclusion, there are several pivotal factors affecting the tribological performance of solid–liquid lubrication systems, including the number of nanoparticles between rubbing contact area, graphitization of the worn W-DLC films, tribofilms on the worn ball specimens and oxidation formed in friction test, and the dominant factor is determined by the testing condition.


2010 ◽  
Vol 39 (2) ◽  
pp. 102-103 ◽  
Author(s):  
Hiroyuki Matsumoto ◽  
Mikihiko Matsuoka ◽  
Tatsuyuki Iwasaki ◽  
Shinobu Kinoshita ◽  
Kazutoshi Noda ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 83065-83073 ◽  
Author(s):  
Mei Lv ◽  
Yanming Wang ◽  
Qihua Wang ◽  
Tingmei Wang ◽  
Yongmin Liang

AO and Pr–AO irradiations induced higher surface energy and wear rates, Pr and AO–Pr irradiations caused the opposite results.


Wear ◽  
2012 ◽  
Vol 292-293 ◽  
pp. 124-134 ◽  
Author(s):  
Xiufang Liu ◽  
Liping Wang ◽  
Zhibin Lu ◽  
Qunji Xue

2021 ◽  
Vol 268 ◽  
pp. 01065
Author(s):  
Man Li ◽  
Yuming Liu ◽  
Naiyuan Cui ◽  
Qiang Yu ◽  
Yu Li ◽  
...  

Due to its unique structure and superior performance, carbon nanotubes are proposed to have great potential applications in many fields. Recently, more and more concerns have been focused on the application of carbon nanotubes in space technology. It is believed that carbon nanotubes can have a broad impact on space missions in future with benefits principally in space technology, such as lightweight structure materials, environment protection materials, energy gerneration and storage and nanoelcetronics. However, carbon nanotubes would suffer chemical and physical damage from the space environment when it was used in spacecraft, just like all the other space materials. The environment where spacecrafts operate is extremely intricate, primarily represented by electromagnetic irradiation, charged particle irradiation, high vacuum, cold and hot alternation, atomic oxygen erosion, clash from space debris, and other factors. The mostly effect in space environment is atomic oxygen and debris for grapheme. This paper is about the research on the experimental methods of carbon nanotubes space environment effect with atomic oxygen and space debris as examples, in a bid to propose the experimental scheme of carbon nanotubes space environment effect. It will be great helpful to promote the applications of carbon nanotubes in space technology.


Wear ◽  
2013 ◽  
Vol 297 (1-2) ◽  
pp. 972-985 ◽  
Author(s):  
Jianwei Qi ◽  
Liping Wang ◽  
Fengyuan Yan ◽  
Qunji Xue

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