scholarly journals Multiwalled carbon nanotubes enhanced the friction layer evolution and self-lubricating property of TiAl-10 wt% Ag-1 wt% MWCNTs sample

RSC Advances ◽  
2017 ◽  
Vol 7 (64) ◽  
pp. 40592-40599 ◽  
Author(s):  
Kang Yang ◽  
Hongru Ma ◽  
Xiyao Liu ◽  
Yangming Zhang ◽  
Qiang He
Keyword(s):  
Carbon Nanotubes ◽  
Energy Consumption ◽  
Multiwalled Carbon Nanotubes ◽  
Friction And Wear ◽  
Wear Properties ◽  
Multiwalled Carbon ◽  
Tial Alloys ◽  
Lubricating Property ◽  
Friction And Wear Properties ◽  
Reducing Energy

The necessity of reducing energy consumption and usage of material in aerospace and aviation industries drives the further optimization of friction and wear properties of TiAl alloys.

Augmentation in tribological performance of polyalphaolefins by COOH- functionalized multiwalled carbon nanotubes as an additive in boundary lubrication conditions

2021 ◽  
pp. 1-27
Author(s):  
Homender Kumar ◽  
Harsha A P
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Friction And Wear ◽  
Analytical Techniques ◽  
Wear Volume ◽  
Wear Properties ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Functionalized Multiwalled Carbon Nanotubes

Abstract This current study emphasized the tribological performances of COOH-functionalized multiwalled carbon nanotubes (MWCNTs) dispersed in two different grades of polyalphaolefins (i.e., PAO 4 and PAO 6). The friction and wear properties have been estimated using SRV 5 tribometer with “ball on disc” configuration. Prior to tribo-testing, MWCNTs were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and Fourier transform infrared spectroscopy (FTIR). The varying dose of MWCNTs (0.025-0.15 wt.%) was incorporated into both PAO base oils to obtain the optimized lubrication behaviour. The test results revealed that PAO 4 exhibited a reduction in friction coefficient (~27%) and wear volume (~88 %) at a dose of 0.05 wt.% and 0.025 wt.% MWCNTs, respectively. However, in PAO 6, the minimum coefficient of friction and wear volume was obtained at a concentration of 0.075 wt.% and 0.05 wt. % of the additive. The results evidenced that PAO 6 based nanolubricants demonstrated the best frictional characteristics while attained the best anti-wear performance with PAO 4 based nanolubricants. For the better unveiling of the lubrication mechanism of MWCNTs, worn surfaces were characterized using various analytical techniques such as scanning electron microscopy (SEM), scan probe microscope (SPM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron microscopy (XPS).

Friction and wear properties of aligned carbon nanotubes reinforced epoxy composites under water lubricated condition

Wear ◽  
2013 ◽  
Vol 308 (1-2) ◽  
pp. 105-112 ◽  
Author(s):  
Lei Yan ◽  
Huaiyuan Wang ◽  
Chao Wang ◽  
Liyuan Sun ◽  
Dujuan Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Epoxy Composites ◽  
Wear Properties ◽  
Aligned Carbon Nanotubes ◽  
Friction And Wear Properties

scholarly journals The experiment research and engineering verification on the synergistic lubrication properties of silver and multiwalled carbon nanotubes

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401987979
Author(s):  
Kang Yang ◽  
Hongru Ma ◽  
Ming Ma ◽  
Haibo Lin ◽  
Xiaoxue Li
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Friction And Wear ◽  
Tial Alloy ◽  
Wear Behavior ◽  
Friction Reduction ◽  
Multiwalled Carbon ◽  
Lubrication Film ◽  
Plasma Sintering ◽  
Spark Plasma

A synergistic lubrication of silver and multiwalled carbon nanotubes was studied to minimize friction and decrease wear in the rotating mechanical components. Samples of TiAl alloy (TA), TiAl–10 wt% Ag (TAA), and TiAl–10 wt% Ag–1.0 wt% multiwalled carbon nanotubes (TAAM) were prepared using spark plasma sintering. The method of experimental test and engineered verification was used to explore the synergistic lubrication of silver and multiwalled carbon nanotubes in the TAAM sliding against Si3N4 balls on the ball-on-disk tribometer of No. HT-1000. The results showed that the friction and wear behavior of the TAA was more excellent than that of a TA. The TAAM obtained the smaller friction coefficient and wear rate in comparison to the TAA. The multiwalled carbon nanotubes were pulled out of the TAAM during sliding, were exposed on a wear scar, and were tightly combined with the silver to form a lubrication film. The lubrication film with silver and multiwalled carbon nanotubes resulted in an excellent friction reduction and wear-resistant property, and it caused the TAAM to obtain smaller friction and lower wear than those of the TA and TAA.

Electroless Ni-P-PTFE Composite Coatings on Titanium Alloy and Their Tribological Properties

2011 ◽  
Vol 291-294 ◽  
pp. 12-17 ◽  
Author(s):  
Zhong Dong Yang ◽  
Di Wu ◽  
Meng Fei Liu
Keyword(s):  
Titanium Alloy ◽  
Friction And Wear ◽  
Composite Coatings ◽  
Wear Properties ◽  
Ptfe Composite ◽  
Composite Plating ◽  
Lubricating Property ◽  
Plating Solution ◽  
Friction And Wear Properties ◽  
Electroless Ni

In this study, it was the first attempt to fabricate Ni-P-PTFE composite coatings on titanium alloy (manufactured through electroless composite plating). The effects of suspended PTFE concentration, temperature and surfactant concentration in the plating solution on the PTFE content in the resulting coatings were investigated. In addition, the friction and wear properties of the samples were analyzed. The results showed that co-deposition of Ni-P and PTFE can obviously decrease the friction coefficient of the coatings, reduce wear and improve lubricating property of the coatings.

Effect of Carbon Nanotubes on Friction and Wear Properties of Glass Fiber/Epoxy Composites

2010 ◽  
Vol 44-47 ◽  
pp. 2181-2185 ◽  
Author(s):  
Yong Kun Wang ◽  
Zhi Wei Xu ◽  
Li Chen
Keyword(s):  
Carbon Nanotubes ◽  
Glass Fiber ◽  
Friction And Wear ◽  
Block Type ◽  
Wear Properties ◽  
Surface Fracture ◽  
Frictional Properties ◽  
Friction And Wear Properties ◽  
Wear Tests ◽  
Properties Of Composites

Glass fiber (GF)/epoxy (EP) composites added by carbon nanotubes (CNTs) were fabricated to investigate the effects of CNTs on the friction and wear properties of GF/EP composites. The surface of the CNTs was treated with acid mixtures to improve their dispersion in the GF/EP composites. The changes of surface properties of CNTs were investigated by using fourier transform infrared spectroscopy. Ring-on-block type wear tests were performed to evaluate the frictional properties of composites. Results show that CNTs after acid treatments can improve the wear resistance and reduce the friction coefficient of GF/EP composites more remarkably than CNTs. The surface fracture of the composite was observed by scanning electron microscope.

Investigation on Friction, Anti-wear, and Extreme Pressure Properties of Different Grades of Polyalphaolefins With Functionalized Multi-walled Carbon Nanotubes as an Additive

2020 ◽  
Vol 142 (8) ◽  
Author(s):  
Homender Kumar ◽  
A. P. Harsha
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Outer Diameter ◽  
Test Results ◽  
Extreme Pressure ◽  
Wear Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Friction And Wear Properties ◽  
Analytical Tools ◽  
Walled Carbon Nanotubes

Abstract In the present investigation, the COOH-functionalized multi-walled carbon nanotubes (MWCNTs) having an outer diameter of 20–30 nm and length 1−2 μm were dispersed in four different grades of polyalphaolefins (PAOs; i.e., PAO 4, PAO 6, PAO 40, and PAO 100) at various concentrations (0.025, 0.05, 0.075, 0.10, and 0.15 wt%) to evaluate friction, anti-wear, and extreme pressure properties. The tribological test was conducted as per ASTM standard using four-ball tester. The test results showed that with the addition of MWCNTs, the friction and wear properties of PAOs had been improved significantly as compared to the base oils. It was also observed that MWCNTs exhibited excellent anti-wear properties than friction properties. The possible reasons for the improvement in friction and wear properties are discussed with the aid of various analytical tools.

Friction and wear properties of copper matrix composites reinforced by tungsten-coated carbon nanotubes

Rare Metals ◽  
2011 ◽  
Vol 30 (6) ◽  
pp. 657-663 ◽  
Author(s):  
Junhui Nie ◽  
Xian Jia ◽  
Chengchang Jia ◽  
Yi Li ◽  
Yafeng Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Wear Properties ◽  
Copper Matrix Composites ◽  
Friction And Wear Properties ◽  
Coated Carbon

Experimental investigation on tribological properties of carbon fabric composites: effects of carbon nanotubes and nano-silica

2017 ◽  
Vol 233 (5) ◽  
pp. 874-884 ◽  
Author(s):  
Majid R Ayatollahi ◽  
R Moghimi Monfared ◽  
R Barbaz Isfahani
Keyword(s):  
Carbon Nanotubes ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Nano Particles ◽  
Woven Composites ◽  
Carbon Fabric ◽  
Wear Properties ◽  
Low Friction ◽  
Fabric Composites ◽  
Friction And Wear Properties

In this study, the effects of nano-[Formula: see text] and carbon nanotubes on the friction and wear properties of carbon-epoxy woven composites have been explored. The unfilled carbon fabric composites and carbon fabric composites filled with carbon nanotubes and nano-[Formula: see text] were fabricated by vacuum infusion process. The worn surfaces were examined and possible wear mechanisms of unfilled and filled carbon fabric composites were discussed. In addition, the friction coefficient curves of unfilled and filled carbon fabric composites were analyzed and compared. The experimental results showed that either of the two nano-particles improved the friction coefficient and wear rate of carbon fabric composites; however, better improvement was observed for nano-SiO2. By adding these nano-particles to unfilled carbon fabric composites, a primary steady-state period with a low friction coefficient appeared in the friction coefficient curve of the composites, which indicates enhancement in bonding strength between carbon fiber and epoxy matrix due to the interfacial reinforcing action of the nano-particles.

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