Effect of Tantalum on the Texture of Copper Vacuum Condensates

Glushchenko, M. A.; Belozyorov, V. V.; Sоbоl, O. V.; Subbotinа, Valeria; Zelenskaya, G. I.; Зубков, А. И.

doi:10.21272/jnep.9(2).02015

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…are used. However, in recent years, thanks to the use of the structural engineering method (structural design), it has been possible to develop new mechanisms for the formation of composite materials [3][4][5], expand the possibilities of managing the structural state in non-equilibrium conditions [6] and stabilize metastable phase-structural states [7].…”

Section: Introductionmentioning

confidence: 99%

The Use of Negative Bias Potential for Structural Engineering of Vacuum-Arc Nitride Coatings Based on High-Entropy Alloys

Sоbоl¹,

Андреев²,

Gorban³

et al. 2019

Problems of Atomic Science and Technology

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The effect of negative bias potential (Ub = -40, -110, and -200 V) during the deposition of multi-element coat-ings on their composition, structure and mechanical properties was studied. It was established that during the transi-tion from a multi-element alloy to a nitride, a single-phase state possible to form on its basis (based on the fcc metal lattice, structural type NaCl). In this case, the composition (FeCoNiCuAlCrV)N of coatings with increasing Ub is de-pleted by the element with the lowest enthalpy of formation of nitride (Cu). In (AlCrTiNbSi)N and (AlCrTiZrNbV)N coatings, the content of low-mass elements (Si and Al) decreases with increasing Ub. In (TiZrHfVNb)N coatings of strong nitride-forming elements with increasing Ub to 200 V, the composition practically does not change. The struc-ture of such coatings is characterized by the presence of a texture with the [111] axis. The presence of weak nitride-forming elements in (FeCoNiCuAlCrV)N coatings leads to the formation of texture [110] for large Ub = 110…200 V. In such coatings, the hardness does not exceed 35 GPa. It is shown that to achieve high hardness at high Ub it is necessary to increase the content in the high-entropy alloy of elements with high nitride-forming ability. In this case, in (TiZrHfVNb)N coatings (made of strong nitride-forming elements with a large mass) at Ub = 200 V, the hardness exceeds 45 GPa.

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Section: Introductionmentioning

confidence: 99%

The Use of Negative Bias Potential for Structural Engineering of Vacuum-Arc Nitride Coatings Based on High-Entropy Alloys

Sоbоl¹,

Андреев²,

Gorban³

et al. 2019

Problems of Atomic Science and Technology

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“…The processes of surface layer modification usually occur under non-equilibrium conditions and are a component of structural surface engineering. In most cases, the use of appropriate technologies of this orientation leads to a decrease in the size of crystalline grains to the nano level [8,9].…”

Section: Introductionmentioning

confidence: 99%

Methods of Structural Engineering of Surface in Solving the Problems of Multifactorial Increase of the Level of Operational Characteristics of Materials

Volkov,

Subbotina,

Subbotin

et al. 2023

SSP

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In the course of the study, several different methods of surface structural engineering are reviewed. The methods described in this paper are characterized by different process physics on the way to obtaining the result, but they are aimed at modifying the structure and properties of the surfaces to which they are applied. Among them, two different technological directions are considered. The first area involves technologies that include a friction component, namely thermofriction treatment (TFT) for thermofriction strengthening (TFS), additional thermofriction strengthening (ATFS) or thermofriction welding (TFW). The second direction is a technology that involves the use of an anode-cathode electrolysis mode in an alkaline-silicate electrolyte – micro-arc oxidation (MAO). The paper describes the features and results of the application of such technologies and the feasibility of using this or that method for materials of different classes, and presents schemes of the corresponding installations. The result of additional hardening of the surface of U8A steel from a microhardness level of 7.2 GPa to 14.7 GPa using the ATFS method after its thermal hardening to almost the maximum possible level is shown. The microstructure of the cross-section of a prehardened specimen of U8A steel after ATFS is presented, where the degree and nature of surface hardening are reliably visible. It is emphasized that in previous studies, consistently effective hardening of steels of various classes has been achieved, even up to the level of 22 GPa in 65G steel. Regarding the method of microarc oxidation, the structure and properties of coatings on low-alloy aluminum alloys AB and AD1 formed in an alkaline-silicate electrolyte in the anode-cathode MAO mode were investigated. It is shown that the method of MAO in alkaline-silicate electrolyte allows to obtain a coating thickness of up to 300 μm, a coating growth rate of ~ 2 μm/min, and a coating hardness of 10-20 GPa. The coatings have high adhesion to the substrate; they have a layered structure. The properties of the coatings are determined by the properties of the base layer. The coatings have a crystalline structure and consist of the following phases: γ-Al2O3, α-Al2O3, mullite (3Al2O3·2SіO2), the ratio between the phases depends on the electrolysis conditions. It has been established that phase formation begins with the γ-Al2O3 phase, which in the process of further coating growth turns into the α-Al2O3 phase or interacts with silicon oxide to form the mullite phase.

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“…The current trend towards constant updating of technologies in mechanical engineering to increase the competitiveness of products requires the creation of new materials to achieve the required functional properties [1,2]. In this regard, structural engineering is the most effective method for achieving the required material properties [3,4]. This method is especially effective for highly non-equilibrium conditions of material formation, when process modeling is not possible due to the multiparametry and uncertainty of the final solutions [5,6].…”

Section: Introductionmentioning

confidence: 99%

Identification of regularities of formation of the phase-structural state and properties of coatings obtained by micro-arc oxidation of high-strength V95 alloy

Subbotinа

Sоbоl

Belozerov

2020

EEJET

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Effect of Tantalum on the Texture of Copper Vacuum Condensates

Cited by 5 publications

References 2 publications

The Use of Negative Bias Potential for Structural Engineering of Vacuum-Arc Nitride Coatings Based on High-Entropy Alloys

The Use of Negative Bias Potential for Structural Engineering of Vacuum-Arc Nitride Coatings Based on High-Entropy Alloys

Methods of Structural Engineering of Surface in Solving the Problems of Multifactorial Increase of the Level of Operational Characteristics of Materials

Identification of regularities of formation of the phase-structural state and properties of coatings obtained by micro-arc oxidation of high-strength V95 alloy

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