scholarly journals Effects of magnetic ionic liquid as a lubricant on the friction and wear behavior of a steel-steel sliding contact under elevated temperatures

Friction ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 61-74 ◽  
Author(s):  
Jiajia Jia ◽  
Guangbin Yang ◽  
Chunli Zhang ◽  
Shengmao Zhang ◽  
Yujuan Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Friction And Wear ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Disk Surface ◽  
Frictional Pair ◽  
Lubrication Film ◽  
Lubricating Film ◽  
Boundary Film ◽  
Magnetic Ionic Liquid

AbstractA magnetic ionic liquid (abridged as MIL) [C6mim]5[Dy(SCN)8] was prepared and used as the magnetic lubricant of a steel-steel sliding pair. The tribological properties of the as-prepared MIL were evaluated with a commercially obtained magnetic fluid lubricant (abridged as MF; the mixture of dioctyl sebacate and Fe3O4, denoted as DIOS-Fe3O4) as a control. The lubrication mechanisms of the two types of magnetic lubricants were discussed in relation to worn surface analyses by SEM-EDS, XPS, and profilometry, as well as measurement of the electric contact resistance of the rubbed steel surfaces. The results revealed that the MIL exhibits better friction-reducing and antiwear performances than the as-received MF under varying test temperatures and loads. This is because the MIL participates in tribochemical reactions during the sliding process, and forms a boundary lubrication film composed of Dy2O3, FeS, FeSO4, nitrogen-containing organics, and thioether on the rubbed disk surface, thereby reducing the friction and wear of the frictional pair. However, the MF is unable to form a lubricating film on the surface of the rubbed steel at 25 °C, though it can form a boundary film consisting of Fe3O4 and a small amount of organics under high temperature. Furthermore, the excessive Fe3O4 particulates that accumulate in the sliding zone may lead to enhanced abrasive wear of the sliding pair.

Tribological Behavior of Ni-Based Self-Lubricating Composites at Elevated Temperatures

2015 ◽  
pp. 72-106
Author(s):  
Jianliang Li ◽  
Dangsheng Xiong ◽  
Yongkun Qin ◽  
Rajnesh Tyagi
Keyword(s):  
High Temperature ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Solid Lubricants ◽  
Friction And Wear Behavior ◽  
Nickel Base ◽  
Self Lubricating Composites

This chapter illustrates the effect of the addition of solid lubricants on the high temperature friction and wear behavior of Ni-based composites. Ni-based composites containing solid lubricant particles both in nano and micrometer range have been fabricated through powder metallurgy route. In order to explore the possible synergetic action of a combination of low and high temperature solid lubricant, nano or micro powders of two or more solid lubricants were added in the composites. This chapter introduces the fabrication of the Ni-based self-lubricating composites containing graphite and/or MoS2, Ag and/or rare earth, Ag and/or hBN as solid lubricants and their friction and wear behavior at room and elevated temperatures. The chapter also includes information on some lubricating composite coatings such as electro-deposited nickel-base coating containing graphite, MoS2, or BN and graphene and their tribological characteristics.

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.

Friction and Wear Behavior of 30CrMnSiA Steel at Elevated Temperatures

2016 ◽  
Vol 25 (4) ◽  
pp. 1407-1415 ◽  
Author(s):  
Sheng-guan Qu ◽  
Fu-qiang Lai ◽  
Guang-hong Wang ◽  
Zhi-min Yuan ◽  
Xiao-qiang Li ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Friction And Wear Behavior

Effect of Humidity on the Friction and Wear Properties of Sn

1995 ◽  
Vol 117 (4) ◽  
pp. 737-741 ◽  
Author(s):  
Y. Imada ◽  
K. Nakajima
Keyword(s):  
Relative Humidity ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Disk Surface ◽  
Wear Loss ◽  
Wear Properties ◽  
Friction And Wear Behavior ◽  
Low Humidity ◽  
Friction And Wear Properties ◽  
Pin On Disk

Variation in friction and wear properties with relative humidity was obtained with an Sn pin sample on a Cu disk at a constant speed (0.4 m/s), load (6.4 N), and sliding distance (5 km), using a pin-on-disk apparatus. The influence of atmosphere on the tribological properties was investigated, including moisture ranging from 4% to 95 percent relative humidity (RH). It was found that the wear loss of the pin sample is very large at low humidity of around 5 percent RH, but it decreases and reaches saturation at about 50 percent RH. Factors characterizing the friction and wear at 50 percent RH were examined along with surface analysis of the disk. The results showed that the extensive transfer of Sn from pin to disk occurs during sliding and that the friction and wear behavior is determined by the friction and wear of an Sn sliding on Sn. An examination was carried out with an Sn pin sample on a stainless steel disk in comparison with an Sn-Cu couple. It was concluded that the friction and wear behavior is determined by the properties of the film transferred to the disk surface.

scholarly journals Friction and Wear Behavior of AlTiN-Coated Carbide Balls Against SKD11 Hardened Steel at Elevated Temperatures

2018 ◽  
Vol 31 (10) ◽  
pp. 1073-1083 ◽  
Author(s):  
Rui Wang ◽  
Hai-Juan Mei ◽  
Ren-Suo Li ◽  
Quan Zhang ◽  
Teng-Fei Zhang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
Hardened Steel ◽  
Friction And Wear Behavior ◽  
Coated Carbide

Temperature effect of friction and wear characteristics for solid lubricating graphite

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540018
Author(s):  
Yeonwook Kim ◽  
Jaehoon Kim
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Hot Gas ◽  
Lubricating Film ◽  
Effective Lubricant ◽  
Worn Surface ◽  
Sealing Materials ◽  
Friction And Wear Characteristics ◽  
Lubricating Properties

Graphite is one of the effective lubricant additives due to its excellent high-temperature endurance and self-lubricating properties. In this study, wear behavior of graphite used as sealing materials to cut off hot gas is evaluated at room and elevated temperature. Wear occurs on graphite seal due to the friction of driving shaft and graphite. Thus, a reciprocating wear test to evaluate the wear generated for the graphite by means of the relative motion between a shaft material and a graphite seal was carried out. The friction coefficient and specific wear rate for the changes of applied load and sliding speed were compared under different temperature conditions considering the actual operating environment. Through SEM observation of the worn surface, the lubricating film was observed and compared with test conditions.

Preparation and Tribological Performace of the Complex of β- Cyclodextrin and RC2540 Dialkyl Pentasulfide

2013 ◽  
Vol 662 ◽  
pp. 288-292
Author(s):  
Ji Ju Guan ◽  
Yi Shen Huang ◽  
Xue Feng Xu ◽  
Wei Peng
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Thermo Gravimetric Analysis ◽  
Wear Property ◽  
Gravimetric Analysis ◽  
Extreme Pressure ◽  
Thermo Gravimetric ◽  
Friction Process ◽  
Lubricating Film ◽  
Ball Test

The complex of β-cyclodextrin (β-CD) and RC2540 dialkyl pentasulfide was synthesized and characterised by means of fourier transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TG) and scanning electron microscope (SEM). Then the friction and wear behavior of RC2540, β-CD and complex were studied by four-ball test using the mixture of PEG-600 and water as base fluid, and finally the lubrication mechanism of β-CD and the complex were analyzed using energy-dispersive X-ray spectroscopy (EDS). The experimental results revealed that the complex had formed well and had better antifriction and anti-wear property than β-CD. RC2540 in complex was released and the extreme pressure film was formed on the friction interface in the friction process. The β-CD molecules in complex were cracked into fragments, and the fragments with hydroxyl also formed lubricating film and fragments with no hydroxyl were mainly carbonized. The lubricating film of the complex had a better tribological performace due to the cooperation of the lubricating film of β-CD and extreme pressure film of RC2540.

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