Influence of Hydrogen on the Wear Resistance of Materials in the Friction Couples of Braking Units

Киндрачук, М. В.; Volchenko, D.A.; Volchenko, N.A.; Stebeletskaya, N. M.; Возный, А. В.

doi:10.1007/s11003-017-0073-z

Cited by 11 publications

(14 citation statements)

References 2 publications

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“…The results of the study prove the findings of earlier scientific research [9,[20][21][22][23][24][25][26], regarding the positive use of carbon nanoparticles of different shapes as "additives" and friction modifiers to lubricants. However, it should be noted that in papers [4,5,8,25], there were used the pure forms of carbon, mainly fullerenes, the cost of obtaining of which is by an order of magnitude higher than that of obtaining conglomerate of carbon of this study.…”

Section: Discussion Of Results From Studying the Influence Of Concentsupporting

confidence: 84%

Determining the influence of carbon black in oil on the wear resistance of elements in the tribological system "steel – oil – bronze"

Voronin

Suranov

Onopreichuk

et al. 2019

EEJET

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Section: Discussion Of Results From Studying the Influence Of Concentsupporting

confidence: 84%

Determining the influence of carbon black in oil on the wear resistance of elements in the tribological system "steel – oil – bronze"

Voronin

Suranov

Onopreichuk

et al. 2019

EEJET

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“…It was previously found that for the formation of a polymer matrix with improved physical and mechanical properties, the following components should be used in As it is known [5,12], a significant effect in improving the CMs properties is observed when introducing nanofillers in homeopathic doses. At the initial stage, the effect of the content of the ONA nanofiller on the elasticity modulus during bending of epoxy-polyester CMs was investigated.…”

Section: Resultsmentioning

confidence: 99%

“…The increase in requirements is conditioned by the reliability of parts and mechanisms by reducing failure probability, their durability and reducing the inter-repair operational period [7][8][9][10]. Nowadays, polymers are the most widely used structural materials that are replacing metals and alloys [11][12][13]. The use of polymeric materials instead of metals increases the cost-effectiveness, reduces manufacturing costs and the weight of parts, with saving the physical-mechanical and thermophysical properties [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Development of Epoxy-polyester Nanocomposite Materials with Improved Physical and Mechanical Properties for Increasing Transport Vehicle Reliability

Brailo¹,

Букетов²,

Yakushchenko³

et al. 2021

J. Nano- Electron. Phys.

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The significant attention is paid to the development of new composite materials which can be widely used in the manufacturing and repairing details and their components in different branches of industry including water transport. Intensity of cargo transportation by the water transport, an increase in the frequency of loading operations, their operation under the influence of aggressive environments put forward requirements for the improvement of indicators of resource saving of vehicle units and increasing the interresource period of work. In this context, the epoxy composite materials are one of the most promising materials, which meet the requirements of modern transport industry, due to their performance characteristics, which in most cases are better than traditional metals and alloys. Therefore, in the work, the physical and mechanical properties of composite materials with nanodispersed additives based on the epoxypolyester matrix, were studied. An oxidized nanoparticle additive and pyrogenic silicon dioxide were used as fillers. It was found that epoxy-polyester composites are characterized by improved properties at significant amount of the oxidized nanoparticle additive. An optimal ratio of the epoxy-polyester binder and additive was 100:0.06-0.08 pts. wt. It was ascertained that the introduction of pyrogenic silicon dioxide leads to a decrease in values of investigated properties of composite materials. In particular, the fracture surface of epoxy-polyester materials was analyzed with the method of optical microscopy. It was stated that composite materials filled with pyrogenic silicon dioxide were characterized by high residual stresses. The presence of low amount of fracture lines on the surface of composite materials filled with nanodispersed additive was revealed. Therefore, composite materials with nanofiller are characterized by higher resistance for fracture and impact loads.

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“…At the same time, an increase of particle size contributes to a decrease of heat transfer coefficients. In addition, during heat transfer in systems with nanofluids, the volume concentration of nanoparticles and their thermal conductivity coefficient have the main effect [35,53,77,84,89,95,114,132,150,158].…”

Section: Behavior Of Nanoparticles In the Engine Cylinder Head Cooling Systemmentioning

confidence: 99%

Hydrogen Containing Nanofluids in the Spark Engine’s Cylinder Head Cooling System

et al. 2021

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The article is devoted to the following issues: boiling of fluid in the cooling jacket of the engine cylinder head; agents that influenced the thermal conductivity coefficient of nanofluids; behavior of nanoparticles and devices with nanoparticles in the engine’s cylinder head cooling system. The permissible temperature level of internal combustion engines is ensured by intensification of heat transfer in cooling systems due to the change of coolants with “light” and “heavy” nanoparticles. It was established that the introduction of “light” nanoparticles of aluminum oxide into the water in a mass concentration of 0.75% led to an increase in its thermal conductivity coefficient by 60% compared to the base fluid at a coolant temperature of 90 °C, which corresponds to the operating temperature of the engine cooling systems. At the indicated temperature, the base fluid has a thermal conductivity coefficient of 0.545 W/(m °С), for nanofluid with particles its value was 0.872 . At the same time, a positive change in the parameters of the nanofluid in the engine cooling system was noted: the average movement speed increased from 0.2 to 2.0 m/s; the average temperature is in the range of 60–90 °C; heat flux density 2 × 102–2 × 106 ; heat transfer coefficient 150–1000 . Growth of the thermal conductivity coefficient of the cooling nanofluid was achieved. This increase is determined by the change in the mass concentration of aluminum oxide nanoparticles in the base fluid. This will make it possible to create coolants with such thermophysical characteristics that are required to ensure intensive heat transfer in cooling systems of engines with various capacities.

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Influence of Hydrogen on the Wear Resistance of Materials in the Friction Couples of Braking Units

Abstract: We describe a method for the industrial investigation of the friction couples of band-block brakes of drill winches preventing hydrogen release from the steel surface of the pulley rim by the electric field with like positive charges restricting the motion of hydrogen ions.

Cited by 11 publications

References 2 publications

Determining the influence of carbon black in oil on the wear resistance of elements in the tribological system "steel – oil – bronze"

Determining the influence of carbon black in oil on the wear resistance of elements in the tribological system "steel – oil – bronze"

Development of Epoxy-polyester Nanocomposite Materials with Improved Physical and Mechanical Properties for Increasing Transport Vehicle Reliability

Hydrogen Containing Nanofluids in the Spark Engine’s Cylinder Head Cooling System

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