Modeling of interaction nanoparticles with cracks on the surface of solids

Vakhrushev, A. V.

doi:10.1016/j.prostr.2020.06.032

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…To start the reaction of bromine with hydrocarbon, the system must be supplied with energy capable for breaking the bromine atoms contained in the solution into radicals. The dissociation energy of bromine [14,15] is 45.5 kcal/mol = 190 kJ/mol = 15894 cm -1 . For example, for a solution of bromine 5×10 -6 m 3 and concentration 6.2×10-11 mol/m 3 to start a chemical reaction requires energy 4.7×10 -7 J.…”

Section: Methods Of Diagnostics Of Bearing Unitsmentioning

confidence: 99%

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Gryadunova

Polyakov

Tokmakov

2018

SSP

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The article is devoted to the diagnosis of bearing units working with hydrocarbon mixtures. The diagnostic is based on the photometric method. This method allows you to determine the internal damage to the bearing unit at the stage of the appearance of the microcrack. The photometric method is based on changing the color of the indicator fabric. As the indicator substance, a bromine solution was used which had a dark brown color. If there is a leak, the hydrocarbon reacts with bromine molecules and a bright spot appears on the tape. Indicator fabric is applied to the bearing unit during assembling.The material of the article contains a model of the physicochemical process, which is the basis of the photometric method. Various stages of leakage of hydrocarbon mixtures through microcracks were studied. The results of the experimental studies are consistent with the theoretical propositions. The proposed diagnostic method can be used as a method for non-destructive testing of bearing units.

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Section: Methods Of Diagnostics Of Bearing Unitsmentioning

confidence: 99%

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Gryadunova

Polyakov

Tokmakov

2018

SSP

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“…Частинки порошку сильно деформуються, подрібнюються і також стають елементами субзеренної структури. Частина їх заповнює мікрокаверни на поверхнях тертя, за рахунок чого загальна шорсткість поверхонь зменшується, а площа контакту суттєво зростає [16][17][18][19]. Така структура забезпечує підвищені характеристики міцності матеріалу, включаючи твердість, опір руйнуванню і тріщиностійкість, за рахунок чого і підвищується зносостійкість пар тертя.…”

Section: вступunclassified

Study of the wear resistance of the surfaces of wheels and rails when using a lubricant composition

2023

RTU

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Nanopowders of Different Chemical Composition Added to Industrial Lubricants and Their Impact on Wear Resistance of Steel Friction Pairs

et al. 2022

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The authors have previously proposed and tested a method for increasing the wear resistance of heavy-loaded friction pairs by saturating industrial lubricants with the metallic nanopowder of the friction pair’s component that has a lower hardness. To confirm the effectiveness of this concept, this paper presents the results of experimental investigations into the tribological characteristics of two medium carbon steels (rail steel K74 and structural steel 20) during sliding friction. Friction surfaces lubricated with compositions based on the Bio Rail industrial lubricant were saturated with nanopowder additives of copper, carbon, and magnesium alloy, as well as K74 and 20 steels. The research findings indicate that lubricants saturated with nanomaterials of K74 and 20 steels help achieve the highest wear resistance, as compared to lubricants based on pure grease and lubricating compositions based on copper, magnesium alloy and carbon powders. The test results confirmed that the mean friction coefficient of the rail steel remained at the level of 0.25 for three hours of operation, which is optimal for the “wheel–rail” friction pair. The proposed method of manufacturing lubricating compositions can be used to improve the efficiency of lubrication of railway rails and rolling stock wheels.

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Modeling of interaction nanoparticles with cracks on the surface of solids

Cited by 3 publications

References 10 publications

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Photometric Method of Diagnosis of Bearing Units Operating with Hydrocarbon Mixtures

Study of the wear resistance of the surfaces of wheels and rails when using a lubricant composition

Nanopowders of Different Chemical Composition Added to Industrial Lubricants and Their Impact on Wear Resistance of Steel Friction Pairs

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