Studying tribotechnical properties of nanostructured lubricating oils with various dispersive media

Болотов, А. Н.; Новиков, В. В.; Новикова, О. О.

doi:10.3103/s1068366617020040

Cited by 17 publications

(8 citation statements)

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“…High frictional properties of KhS-2-1BB can be explained by the ability to react chemically with the active chlorine metal of a phenyl nucleus and further formation of iron chlorides on the friction surface, which prevent scoring and seizing of the surfaces. However, when a boundary friction mode is clear (tests on a ball friction machine MTSh-M [3] under a high contact pressure), KhS-2-1BB has slightly worse anti-wear properties on the steel-steel friction pair than other liquids. At the same time, PES-5 liquid is very good in protecting against wear at high contact loads.…”

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 98%

“…Based on the requirements to magnetic oils for friction units, a dispersion medium (carrier liquid or substrate), which reaches 80 vol%, should have the following characteristics: low volatility, optimal viscosity-temperature properties, good lubricating properties at boundary lubrication, high resistance to oxidation when there is finely dispersed magnetite, magnetic and rheological stability, and low cost. It was established [3] that magnetic oil lubricating properties correlate well with the similar properties of the dispersion medium at a qualitative level.…”

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

“…During tests on a finger friction testing machine MTF [3], the liquid KhS-2-1BB showed low wear and a friction coefficient (*0.03) at the contact pressure of 4.2 MPa. High frictional properties of KhS-2-1BB can be explained by the ability to react chemically with the active chlorine metal of a phenyl nucleus and further formation of iron chlorides on the friction surface, which prevent scoring and seizing of the surfaces.…”

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

“…However, oxidation products of this oil (phosphoric acid, incomplete phosphoric acid esters) produced by thermomechanical influences show strong corrosive activity, which limits the use of phosphates as a lubricant basis. The lubricating properties of POM perfluoroester are far from the best, but these properties of the magnetic oil on its basis become uniquely high [3]. However, POM-based magnetic oil is not suitable for widespread use due to its high cost.…”

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

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Magnetic Nanodispersed Lubricating Oils Based on Organosilicon Fluids: Basics of the Technology

Болотов

Novikov

Новикова

2018

Proceedings of the 4th International Conference on Industrial Engineering

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The results of studying tribotechnical and physicochemical properties of various liquids have proved applicability of a dispersion medium, which is based on organosilicon liquids, for producing new-generation magnetic lubricating oils. The paper gives recommendations for choosing a dispersed magnetic phase. It analyzes the accumulated experience on choosing the materials to stabilize colloidal particles. It also shows an original approach to selecting surfactants that are intended for stabilization of a magnetic oil colloidal structure, taking into account their dielectric properties and the effect on friction. There are data on the preliminary selection of additives and fillers for a magnetic oil, which are characterized by various mechanisms for reducing friction and wear of lubricated surfaces. The paper shows the efficacy of additives under various operating conditions of a friction unit with a magnetic oil. It describes technological features of the synthesis of lubricating oils based on polyethylsiloxane PES-5 and chlorophenylsiloxane KhS-2-1VV containing nanosized magnetite. The authors have obtained promising magnetic lubricating oils with good lubricating properties: low volatility and a wide temperature operating range.

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Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 98%

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

Section: Selecting a Dispersion Medium For Magnetic Lubricating Oilsmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic Nanodispersed Lubricating Oils Based on Organosilicon Fluids: Basics of the Technology

Болотов

Novikov

Новикова

2018

Proceedings of the 4th International Conference on Industrial Engineering

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“…Оборудование для триботехнических испытаний масел. Испытания масел проводились в граничном режиме трения на трибометрах МТШ и МТП [21], которые позволяют проводить исследования в широком диапазоне давлений на контакте. В трибометре МТШ трение происходит между шаровым образцом и плоской поверхностью (давление на контакте -до нескольких гигапаскалей, скорость скольжения -0,32 м/с).…”

Section: методы исследований и материалыunclassified

The Effect of the Nanodisperse Phase of Magnetic Oils on Their Lubricating Properties

Болотов¹,

Новикова²

2022

Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials

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Работа посвящена изучению процессов, протекающих в граничном смазочном слое, в которых нанодисперсные магнитные частицы играют определяющую или значительную роль. Исследовалось трение между металлическими поверхностями смазанными маслами с различной концентрацией магнитной нанодисперсной фазы. Дисперсионная среда магнитных масел состояла из жидкостей с различными физико-химическими свойствами: диоктилсебацината, триэтаноламина, полиэтилсилоксана. Было показано, что интенсивность изнашивания поверхностей с твердостью выше, чем у наночастиц монотонно возрастает по мере увеличения концентрации частиц, а износ носит абразивный характер. Интенсивность изнашивания более мягких материалов проходит через минимум при концентрации частиц около 2 об.%. Магнитная сепарация крупных агломератов в масле позволяет на некоторое время уменьшить абразивный износ, пока они не образуются снова в условиях трения. Выявить закономерности влияния нанодисперсных частиц на силу трения не удалось, вероятно оно несущественное. Рассмотрено несколько примеров косвенного влияния нанодисперсных частиц на граничное трение. Во всех примерах определяющую роль играет огромная по площади активная поверхность частиц в единице объема масла. Например, в условиях трения может активно образовываться атомарный водород при химическом взаимодействии жирных кислот с поверхностью. Атомарный водород аккумулируется в подповерхностных порах, молизуется там. Повышенное давление в порах, создаваемое молекулами водорода, приводит к увеличению износа по механизму отслаивания. Представляют научный интерес установленные закономерности влияния нанодисперсных частиц на скорость формирования граничного смазочного слоя и коррозионный износ поверхностей, вызванный поверхностно-активными присадками в магнитном масле. The work is devoted to the study of processes occurring in the boundary lubricant layer, in which nanodisperse magnetic particles play a decisive or significant role. The friction between metal surfaces with lubricated oils of different concentrations of the magnetic nanodisperse phase was studied. The dispersion medium of magnetic oils consisted of liquids with various physico-chemical properties: dioctylsebacinate, triethanolamine, polyethylsiloxane. It has been shown that the wear intensity of surfaces with a hardness higher than that of nanoparticles monotonically increases with increasing the particle concentration, and wear is abrasive in nature. The wear rate of softer materials passes through a minimum at a particle concentration of about 2 vol.%. Magnetic separation of large agglomerates in oil allows for some time to reduce the abrasive wear until they are formed again under friction conditions. It was not possible to identify the regularities of the influence of nanodispersed particles on the friction force, it is probably insignificant. Several examples of the indirect effect of nanodispersed particles on the boundary friction are considered. In all the examples, the determining role plays huge area of the active surface of particles per unit volume of oil. For example, under conditions of friction, atomic hydrogen can be actively formed during the chemical interaction of fatty acids with the surface. Atomic hydrogen accumulates in the subsurface pores and is crystallized there. The increased pressure in the pores created by hydrogen molecules leads to an increase in wear by the peeling mechanism. The established regularities of the influence of nanodispersed particles on the rate of formation of the boundary lubricant layer and the corrosion wear of surfaces caused by surface-active additives in magnetic oil are of scientific interest.

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Fabrication and Triboengineering Properties of Aluminum Composite Ceramic Coatings

Болотов

Новиков

Новикова

2019

Lecture Notes in Mechanical Engineering

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Studying tribotechnical properties of nanostructured lubricating oils with various dispersive media

Cited by 17 publications

References 1 publication

Magnetic Nanodispersed Lubricating Oils Based on Organosilicon Fluids: Basics of the Technology

Magnetic Nanodispersed Lubricating Oils Based on Organosilicon Fluids: Basics of the Technology

The Effect of the Nanodisperse Phase of Magnetic Oils on Their Lubricating Properties

Fabrication and Triboengineering Properties of Aluminum Composite Ceramic Coatings

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