Tribological properties of graphene oxide and polyethylene glycol composites under dry friction and oil lubrication conditions

2021 ◽  
pp. 51935
Author(s):  
Chengzhi Li ◽  
Guangshen Xu ◽  
Lisha Wang ◽  
Jianhui Li ◽  
Hailin Lu
Keyword(s):  
Graphene Oxide ◽  
Polyethylene Glycol ◽  
Tribological Properties ◽  
Dry Friction ◽  
Oil Lubrication ◽  
Lubrication Conditions

Tribological properties of ta-CNx coatings with different nitrogen content under oil lubrication conditions

2017 ◽  
Vol 621 ◽  
pp. 12-18 ◽  
Author(s):  
Xingrui Deng ◽  
Takafumi Hattori ◽  
Noritsugu Umehara ◽  
Hiroyuki Kousaka ◽  
Kazuyoshi Manabe ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Tribological Properties ◽  
Oil Lubrication ◽  
Lubrication Conditions

scholarly journals Microstructure and Tribological Properties of Fe-Based Laser Cladding Layer on Nodular Cast Iron for Surface Remanufacturing

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 974
Author(s):  
Dongya Zhang ◽  
Zhongwei Li ◽  
Hongwei Fan ◽  
Hongbin Rui ◽  
Feng Gao
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Tribological Properties ◽  
Dry Friction ◽  
Equivalent Stress ◽  
Nodular Cast Iron ◽  
Friction Coefficients ◽  
Cladding Layer ◽  
Starved Lubrication ◽  
Lubrication Conditions

In this study, a cladding layer and nitriding layer were prepared on nodular cast iron, to provide guidance for remanufacturing of nodular cast iron. Their microstructure and composition and the tribological properties under dry and starved lubrication conditions were studied. Meanwhile, the contact stresses at different friction stages were simulated through the finite element method. The micro-hardness of the cladding layer and nitriding layer were 694 HV0.5 and 724.5 HV0.5, which were 4 times and 4.2 times higher than that of the substrate. For dry friction conditions, the wear resistance of the cladding layer and nitriding layer were 113.2 times and 65.5 times that of the substrate. For starved lubrication conditions, the friction coefficients of the cladding layer and nitriding layer were lower than that of the substrate. In addition, their average friction coefficients and wear resistance were gradually reduced with the increase in load. Contact simulation showed that the maximum equivalent stress gradually increased with the friction coefficient during the dry friction, and the peak value of von Mises stress on the nitriding layer was larger than that of the cladding layer, and the nitriding layer was more likely to yield and peel off.

Effect of texture parameters on the tribological properties of spheroidal graphite cast iron groove-textured surface under sand-containing oil lubrication conditions

Wear ◽  
2019 ◽  
Vol 428-429 ◽  
pp. 470-480 ◽  
Author(s):  
Dongya Zhang ◽  
Feifei Zhao ◽  
Xian Wei ◽  
Feng Gao ◽  
Pengyang Li ◽  
...  
Keyword(s):  
Cast Iron ◽  
Tribological Properties ◽  
Spheroidal Graphite ◽  
Textured Surface ◽  
Oil Lubrication ◽  
Spheroidal Graphite Cast Iron ◽  
Graphite Cast Iron ◽  
Texture Parameters ◽  
Lubrication Conditions

Tribological properties of Ti-doped diamond-like carbon coatings under dry friction and PAO oil lubrication

2018 ◽  
Vol 51 (3) ◽  
pp. 361-370 ◽  
Author(s):  
Youzhi Guo ◽  
Peng Guo ◽  
Lili Sun ◽  
Xiaowei Li ◽  
Peiling Ke ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Dry Friction ◽  
Diamond Like Carbon ◽  
Oil Lubrication ◽  
Carbon Coatings

COMBINED PLASMA NITRIDING AND SURFACE TEXTURING FOR IMPROVING TRIBOLOGICAL PERFORMANCE OF 316 STAINLESS STEEL

2020 ◽  
Vol 27 (10) ◽  
pp. 1950226
Author(s):  
ZHIQI LIU ◽  
HUANHUAN WANG ◽  
NAIMING LIN ◽  
RENHUI DUAN
Keyword(s):  
Stainless Steel ◽  
Mass Loss ◽  
Dry Friction ◽  
Plasma Nitriding ◽  
Surface Texturing ◽  
Tribological Performance ◽  
Oil Lubrication ◽  
316 Stainless Steel ◽  
Nitrided Surface ◽  
Lubrication Conditions

Combined plasma nitriding and surface texturing approach were conducted on 316 stainless steel to enhance the tribological performance. Five different surfaces (316 substrates, plasma-nitrided 316, surface-textured 316, plasma-nitrided surface-textured 316, and surface-textured plasma-nitrided 316) were investigated. The tribological behaviors were studied using a ball-on-disk rotary tribometer against counterparts of Si3N4 balls in the air and under oil lubrication conditions. The results were analyzed from the aspects of friction coefficient, mass loss, and surface morphology about the tested specimens. The results presented that the frictional properties of the surface of plasma-nitrided surface-textured 316 were optimal under both friction conditions. Under dry friction conditions, the influence of plasma nitriding on mass loss was greater than that of surface texturing. Under oil lubrication conditions, the influence of surface texturing on mass loss was greater than that of plasma nitriding, and the processing sequence of surface texturing and plasma nitriding had little effect on the mass loss. The better wear resistance of plasma-nitrided surface-textured 316 resulted from the following aspects: first, the nitriding layer improved the surface hardness of the material. Secondly, the surface texture can capture the debris under dry friction conditions and provide continuous lubrication under oil lubrication condition.

The Tribological Characteristics of Polyimide Bonded Solid Lubricating Films under Different Lubrication Conditions

2011 ◽  
Vol 399-401 ◽  
pp. 2026-2030 ◽  
Author(s):  
Yin Ping Ye ◽  
Rui Jie Yang ◽  
Hong Qi Wan ◽  
Jian Min Chen ◽  
Hui Di Zhou
Keyword(s):  
Wear Resistance ◽  
Diesel Fuel ◽  
Dry Friction ◽  
Friction And Wear ◽  
Friction Condition ◽  
Oil Lubrication ◽  
Lubricating Film ◽  
Lubrication Oil ◽  
Lubrication Conditions ◽  
Paraffin Liquid

In this paper, the tribological behaviors of polyimide bonded PTFE solid lubricating film and polyimide bonded MoS2 solid lubricating film under dry sliding and under lubrication of kerosene oil, diesel fuel, paraffin liquid and lubrication oil were investigated by using a ring-on-block wear tester. The results show that the anti-friction and wear-resistance properties of both lubricating films are greatly improved under oil lubrication conditions as compared with the dry friction condition; the friction coefficients of both lubricating films under different oil lubrications keep steady-state value with 0.08; but both lubricating films under different oil lubrications reveal the different wear-resistance properties, such as the best wear-resistance properties under diesel fuel, followed by paraffin liquid, lubrication oil and kerosene oil; the differences in the wear-resistance properties of the lubricating films under different lubrication conditions are mainly ascribed to the influence of the oil’s characteristics, especially boiling point and viscosity.

Phase change-induced tunable dielectric permittivity of poly(vinylidene fluoride)/polyethylene glycol/graphene oxide composites

2019 ◽  
Vol 173 ◽  
pp. 106920 ◽  
Author(s):  
Junyang Tu ◽  
Hairong Li ◽  
Ziqing Cai ◽  
Jingjing Zhang ◽  
Xiang Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polyethylene Glycol ◽  
Dielectric Permittivity ◽  
Phase Change ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Oxide Composites
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