Investigation of Structure and Wear Resistance of Nanocomposite Coating of Chemical Nickel

Safonov, V.V.; Shishurin, Sergey Aleksandrovich; Gorbushin, P.A.; Chumakova, S.; Kolomeichenko, A. V.; Kuznetsov, Yu. A.; Kalashnikova, Larisa

doi:10.24874/ti.2018.40.04.02

Cited by 1 publication

(2 citation statements)

References 9 publications

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“…As a result, there is the possibility of the formation of branched dislocations, both at the layer surface and between the layer and the base material, which make it difficult for the output of the dislocations, directly to the surface and lead to an increase in the stresses, in the material below this layer [3,16,17].…”

Section: Establishing the Tangential Component Of The Sliding Stress/tension (Tct) And Of Methodologymentioning

confidence: 99%

“…By analogy with the superficial tension of the liquids, which tends to shrink their surface, the linear tension of the dislocation is defined as a force T guided on the direction of the dislocation, which tends to reduce its length. Based on relationships (16) and (18) it results that dislocation will tend to have a length, as small as possible, attained by shrinking its associated energy, to get in this way a configuration as close as possible to the equilibrium configuration. Under these conditions, the linear tension, T is obtained by deriving the dislocation energy in relation to the length L; preceding in this way, from the relation (16) it results that the linear tension of a linear dislocation becomes:…”

Section: Linear Tension Of the Dislocations In The Selective-transfer Conditionsmentioning

confidence: 99%

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A Modelling Study of the Correlation between the Layer Obtained by Selective Transfer and the Dislocations Movement at the Friction Surfaces Limit

Ilie

Ipate

2022

Metals

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The selective transfer phenomenon (STP) is based on physico-chemical processes occurring in the contact area of a friction pair, with an element from a copper alloy and allows the metallic transfer of particles of micro/nanometric size, forming a thin superficial tribologically performing layer under energy and relative motion conditions. During the formation of the layer, its crystalline network has an excess of defects and this makes the dislocations to come to the surface. The layer thickness is small, porous, and with comparable dimensions to those of the tensions field of the dislocations. This paper presents a review and analysis of the STP based on dislocations movement to establish and know the tensions field influence, the energy (about 0.25 J/m), and the linear tension of dislocations (~2.42 × 10−9 N) at the contact surfaces zone of a friction pair, by which we can ensure a low wear state (~4.16 × 10−5–2.16 × 10−4 g/min), and a reduced friction coefficient (~0.014–0.034). Therefore, the purpose of the paper is to analyze the STP based on the dislocations movement because is proves the existence (presence), importance, and utility of the dislocations, respectively, the dislocations movements during the conditions’ selective transfer, at the limit of the friction surfaces, under the action of a tensions field, whose components are determined analytically by modelling, together with energy and the linear tension. Also, the layer formed through STP has the property of ensuring during the deformation process an agglomeration of dislocations (structural defects) which protects it from destruction, and therefore, a self-regulation of the equilibrium processes, disturbed during the friction process, to maintain the friction and wear of the friction pairs within reduced limits.

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Section: Establishing the Tangential Component Of The Sliding Stress/tension (Tct) And Of Methodologymentioning

confidence: 99%

Section: Linear Tension Of the Dislocations In The Selective-transfer Conditionsmentioning

confidence: 99%

A Modelling Study of the Correlation between the Layer Obtained by Selective Transfer and the Dislocations Movement at the Friction Surfaces Limit

Ilie

Ipate

2022

Metals

View full text Add to dashboard Cite

show abstract

Investigation of Structure and Wear Resistance of Nanocomposite Coating of Chemical Nickel

Cited by 1 publication

References 9 publications

A Modelling Study of the Correlation between the Layer Obtained by Selective Transfer and the Dislocations Movement at the Friction Surfaces Limit

A Modelling Study of the Correlation between the Layer Obtained by Selective Transfer and the Dislocations Movement at the Friction Surfaces Limit

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