Effect of Carbon Nanotubes on Mechanochemical Synthesis of d-Metal Carbide Nanopowders and Nanocomposites

Nakonechna, O.; Dashevskyi, M.; Boshko, O.; Zavodyannyi, Viktor; Belyavina, N. N.

doi:10.15407/ufm.20.01.005

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…On the other hand, lattice parameter of the known YC 0.33 carbide with NaCl-type structure is somewhat higher (0.5102 nm [7]) than that of starting value of lattice parameter for Y 1−x Cu x O 0.5 C 0.5 (x = 0.1), while this starting value is similar to that for Y 2 OC oxycarbide (0.4948 nm [8]). Previously YC 0.44 binary carbide with a = 0.5015 nm was successfully synthesized by us after 60 min of milling the Y-CNT charge [9]. It was found that the lattice parameter of the Y 2 O 3 oxide formed at processing of the both charges in a ball mill dose not change (a = 1.060(1) nm).…”

Section: Resultsmentioning

confidence: 99%

Effect of the Carbon Nanotubes on Oxidation Behaviour of Mechanically Alloyed Y–Cu Powders

Nakonechna¹,

Dashevskyi²,

Kuryliuk³

et al. 2020

Metallofiz. Noveishie Tekhnol.

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A set of experiments on mechanical alloying of Cu and Y powders of two compositions is performed in a high-energy planetary mill in air. The first composition consists of equiatomic Y-Cu mixture, while the second composition contains an admixture of 1% vol. of multiwalled carbon nanotubes (CNTs). The synthesis products of Y-Cu and Y-Cu-CNT mixtures, selected after each 10 min of processing, are studied by a combination of X-ray diffraction methods (qualitative and quantitative phase analysis, refinement of the crystal structure of individual phases). Based on the data obtained, the effect of atmospheric oxygen and carbon dopants (CNTs) on the phase composition and the crystalline structure of reaction products are analyzed. As shown, the oxidation of reaction products is accompanied by the formation of a mixture of oxygen-containing phases, namely, Y 2 O 3 /Y 1−x Cu x O for the Y-Cu composition and Y 2 O 3 /Y 1−x Cu x O 0.5 C 0.5 for the Y-Cu-CNT composition. Moreover, it is established that Y 1−x Cu x O oxide and Y 1-x Cu x O 0.5 C 0.5 carboxide (both crystallized in a NaCl type structure) are the substitutional solid solutions, the copper content of which increases to 25 at.%. As shown, the phase transformations during Y-Cu mixture processing occur 10 min earlier than similar transformations during Y-Cu-CNT mixture processing, which means that the carbon dopants (in form of CNTs) could be an oxidation inhibitor at mechanochemical synthesis.

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Section: Resultsmentioning

confidence: 99%

Effect of the Carbon Nanotubes on Oxidation Behaviour of Mechanically Alloyed Y–Cu Powders

Nakonechna¹,

Dashevskyi²,

Kuryliuk³

et al. 2020

Metallofiz. Noveishie Tekhnol.

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“…We have successfully applied mechanical alloying to obtain a number of carbides using elemental transition dmetal powders and multiwalled carbon nanotubes (CNT) as charge components. As a result, nanoscaled TiC, ZrC, HfC, VC, NbC, TaC monocarbides [12,13], Mo2C, W2C, WC carbides [14], Fe3C [15] and Co3C [16] were synthesized.…”

Section: Introductionmentioning

confidence: 99%

Features of cubic Ni3C and NiC carbides obtained by HT-HP sintering

Nakonechna

Stratiіchuk

Kuryliuk

et al. 2022

Phys. Chem. Solid St.

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In this work NiC carbides were manufactured by HP-HT sintering of mechanically alloyed charges of the elemental Ni–carbon nanotubes (CNT) or Ni–Graphite. Structural features of the materials obtained were characterized by X-ray diffraction and scanning electron microscopy. X-ray diffraction studies have revealed that the crystal lattice of nickel carbide obtained from mechanically alloyed Ni–CNT charge is supplemented with additional Carbon atoms from the graphite shell of the high-pressure cell at HT-HP sintering. On the other hand, nickel carbide fabricated from mechanically alloyed Ni–Graphite charge retains its composition. It is shown that materials studied in this work demonstrate an advanced value of microhardness (up to 7 GPa).

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“…Mechanical alloying has recently been gaining increasing application due to the possibility of obtaining novel nanoscale materials with an interesting set of functional properties. Previously we have successfully synthesized such well-known d-metal carbides as TiC, ZrC, HfC, VC, NbC, TaC, Mo2C, W2C, WC, Fe3C and Co3C using multi-walled carbon nanotubes (CNTs) as a carbon component of the charge [1][2][3][4][5]. It was also shown that the crystal structures of the carbides obtained have certain features in the atoms arrangement [5].…”

Section: Introductionmentioning

confidence: 99%

“…Previously we have successfully synthesized such well-known d-metal carbides as TiC, ZrC, HfC, VC, NbC, TaC, Mo2C, W2C, WC, Fe3C and Co3C using multi-walled carbon nanotubes (CNTs) as a carbon component of the charge [1][2][3][4][5]. It was also shown that the crystal structures of the carbides obtained have certain features in the atoms arrangement [5]. At the same time the mechanically alloyed Ni-CNT (3:1) powder obtained significantly differs from the synthesis products obtained by other authors.…”

Section: Introductionmentioning

confidence: 99%

Parameters of crystal and electronic structure and magnetic properties of mechanically alloyed Ni3C cubic carbide

Nakonechna

Ivanenko

Kuryliuk

et al. 2021

Phys. Chem. Solid St.

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The cubic Ni3.3C carbide has been fabricated by mechanical alloying of elemental Ni powder and the multiwalled carbon nanotubes in a high energy planetary ball mill. Crystal structure of carbide obtained belongs to the defective structure of ZnS sphalerite type according to x-ray diffraction data. Parameters of the electronic structure of Ni3.3C were calculated by linearized muffin-tin orbitals method within the plane-wave approximation using as an input the defined parameters of crystal structure. Magnetic properties, such as temperature and field dependences of the magnetic susceptibility of Ni3.3C have been studied. Based on experimental data obtained by studying the crystal structure and magnetic properties of Ni3.3C, as well as on the basis of calculations of electronic structure parameters, a preferred displacement of the carbon atoms in tetrahedral voids of Ni crystal lattice has revealed.

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Effect of Carbon Nanotubes on Mechanochemical Synthesis of d-Metal Carbide Nanopowders and Nanocomposites

Cited by 14 publications

References 36 publications

Effect of the Carbon Nanotubes on Oxidation Behaviour of Mechanically Alloyed Y–Cu Powders

Effect of the Carbon Nanotubes on Oxidation Behaviour of Mechanically Alloyed Y–Cu Powders

Features of cubic Ni3C and NiC carbides obtained by HT-HP sintering

Parameters of crystal and electronic structure and magnetic properties of mechanically alloyed Ni3C cubic carbide

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