Formation and Characterization of Nanostructured Composite Coatings Based on the TiN Phase

Komarov, F. F.; Konstantinov, S. V.; Pogrebnjak, A.D.; Пилько, В. В.; Kozak, C.; Opielak, Marek

doi:10.12693/aphyspola.125.1292

Cited by 21 publications

(3 citation statements)

References 13 publications

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“…The amount of nitrogen in the coatings is 50 at %. Consequently, stoichiometric titanium nitride TiN forms and the purely metallic phase is absent [11,12]. Moreover, the absence of carbon, oxygen, boron, and other impurities that can produce interstitial phases in metals suggests that 90-95% of octahedral pores in the crustal lattice are occupied by nitrogen atoms.…”

Section: Resultsmentioning

confidence: 99%

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

2015

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Abstract-The influence of high-fluence ion irradiation of nanostructured (Ti, Hf, Zr, V, Nb)N coatings is revealed for the first time. The energy of irradiating helium ions is equal to 500 keV, and their fluence falls into the interval 5 × 10 16 -3 × 10 17 ions/cm 2 . The performance of the coatings in a nuclear reactor is simulated by conducting post-irradiation thermal annealing at 773 K for 15 min. The elemental composition, structure, morphology, and strength properties of the (Ti, Hf, Zr, V, Nb)N coatings are studied before and after irradiation. No considerable structural and phase modifications in the coatings are found after irradiation, except for the fact that crystallites in the coatings drastically reduce in size to less than 10 nm. Nor does the atomic composition of the coatings change. It is shown that the microhardness of the coatings depends on the fluence of irradiating ions nonlinearly. It can be argued that the (Ti, Hf, Zr, V, Nb)N coatings are radiationresistant and hence promising for claddings of fuel elements in nuclear reactors. DOI: 10.1134/S1063784215100187INTRODUCTION High-entropy nitride alloys, such as (Ti, Hf, Zr, V, Nb)N compounds, are of great interest owing to their unique properties. It was shown [1][2][3][4][5][6][7] that when the entropy extremely rises, relaxation has no time to proceed and the system remains nonequilibrium. This improves the operating performance of coatings, specifically, their properties such as strength, wear resistance, corrosion resistance, heat resistance, and hightemperature stability [1][2][3][4][5]. High entropy is achieved in a multicomponent single-phase disordered solid solution prepared by vacuum deposition. In this method, a coating is deposited on a substrate at a low temperature as a result of which the coating nucleation and growth rates are high. This feature adds to the entropy of the forming system and favors the formation of an ultra-fine-grained structure of the nanocrystalline film.As is known [8], the state of the system is described in terms of the thermodynamic potential function(1) where G is the internal energy, p is the pressure, V is the volume, T is the temperature, and S is the entropy.The stability of a thermodynamic system is characterized by a minimum of the Helmholtz free energy,

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Section: Resultsmentioning

confidence: 99%

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

2015

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“…Исследования таких покрытий на подложках различного типа интенсивно и широко ведутся различными коллективами и представлены в циклах работ Погребняка, Береснева, Колесникова и др. [6][7][8][9][10][11][12][13]. В этих исследованиях большой объем занимают работы по изучению свойств сверхтвердых наноструктурных покрытий нового типа на основе (Ti−Hf−Si)N и (Ti−Hf)N на подложках кремния и стали [8][9][10][11][12][13].…”

Section: Introductionunclassified

Состав, структура и механические свойства (Ti-Hf)N-покрытий на титановом сплаве

Прохоров¹,

Гладких²,

Иванов³

et al. 2019

Журнал Технической Физики

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Приведены результаты исследования состава, структуры и механических характеристик (твердости, модуля упругости) (Ti−Hf)N-покрытий с разным содержанием гафния (соотношением Ti : Hf). Образцы представляли собой пластины титанового сплава ВТ6, на которые методом магнетронного напыления наносились покрытия нитрида титана и гафния. Для определения зависимости характеристик покрытия от содержания Hf были приготовлены и исследовались образцы четырех номинальных составов: (Ti 0.9 Hf 0.1 )N, (Ti 0.85 Hf 0.15 )N, (Ti 0.8 Hf 0.2 )N, и (Ti 0.7 Hf 0.3 )N. Установлено распределение элементов по поверхности и по толщине покрытий; определены фазовый состав и зависимость параметров решетки нитрида титана от содержания Hf в покрытии. Методом инструментального индентирования измерены изменения по толщине твердости и модуля упругости покрытий. Максимальные значения твердости (∼ 35 GPa) и модуля упругости (∼ 500 GPa) получены у покрытий состава (Ti 0.85 Hf 0.15 )N и (Ti 0.8 Hf 0.2 )N. У покрытий этих же составов установлено наиболее равномерное распределение Hf по толщине.

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“…The results of fundamental research of these materials demonstrate a large number of various physical and chemical properties [11,14,15]. The influence of surface on material properties is studied in [16][17][18]. The negative capacitance [19] and the shape memory [20] effects of the nanostructured materials are known as well.…”

Section: Introductionmentioning

confidence: 99%

Presence of Inductivity in (CoFeZr)_x(PZT)_1-xNanocomposite Produced by Ion Beam Sputtering

et al. 2015

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This paper presents the investigations of the electrical properties of the (CoFeZr)x(PZT)1−x nanocomposite with the metallic phase content x = 43.8 at.%, which was produced by ion beam sputtering. Such preparation took place under an argon atmosphere with low oxygen content with its partial pressure PO 2 = 2 × 10 −3 Pa. The measurements were performed using alternating current within the frequency range of 50 Hz-10 5 Hz for measuring temperatures ranging from 238 K to 328 K. The (CoFeZr)43.8(PZT)56.2 nanocomposite sample subjected to a 15 min annealing process in air at the temperature Ta = 423 K demonstrates a phase angle of −90 • ≤ θ ≤ 0 • in the frequency range 50 Hz-10 5 Hz. It corresponds to the capacitive type of conduction. In the frequency range 10 4-10 5 Hz sharp minima in selected conductivity vs. frequency characteristics occur, which corresponds to a current resonance phenomenon in RLC circuits. In case of a sample annealed at Ta = 498 K the inductive type of conduction with 0 • ≤ θ ≤ +90 • occurs in a high frequency area. At the frequency fr characterized by the phase angle θ = 0 • , the capacity value reaches its local minimum. It indicates a voltage resonance phenomenon in conventional RLC circuits. The θ = +90 • crossing in the frequency dependence of phase angle corresponds to the current resonance phenomenon, which is represented by a strong local minimum in the conductivity vs. frequency characteristics.

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Formation and Characterization of Nanostructured Composite Coatings Based on the TiN Phase

Cited by 21 publications

References 13 publications

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

Состав, структура и механические свойства (Ti-Hf)N-покрытий на титановом сплаве

Presence of Inductivity in (CoFeZr)_x(PZT)_1-xNanocomposite Produced by Ion Beam Sputtering

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Formation and Characterization of Nanostructured Composite Coatings Based on the TiN Phase

Cited by 21 publications

References 13 publications

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

Radiation Resistance of high-entropy nanostructured (Ti, Hf, Zr, V, Nb)N coatings

Состав, структура и механические свойства (Ti-Hf)N-покрытий на титановом сплаве

Presence of Inductivity in (CoFeZr)x(PZT)1-xNanocomposite Produced by Ion Beam Sputtering

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Product

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Presence of Inductivity in (CoFeZr)_x(PZT)_1-xNanocomposite Produced by Ion Beam Sputtering