Cubic SiC nanowire synthesis by DC arc discharge under ambient air conditions

Pak, A. Ya.; Ивашутенко, А. С.; Захарова, А. А.; Vassilyeva, Yuliya Z.

doi:10.1016/j.surfcoat.2020.125554

Cited by 40 publications

(11 citation statements)

References 37 publications

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“…The main goal of this work is to develop new ways of efficient and inexpensive synthesis of a hard and economically interesting material. In this research, we proposed and investigated a new experimental method of synthesis of WB 5– x using a vacuumless technique proposed by Pak et al , We optimized the parameters of the synthesis to obtain WB 5– x –WB 2 samples containing over 60% of WB 5– x by volume displaying high hardness.…”

Section: Introductionmentioning

confidence: 99%

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

et al. 2022

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We proposed an efficient method toward the synthesis of higher tungsten boride WB5–x in the vacuumless direct current atmospheric arc discharge plasma. The crystal structure of the synthesized samples of boron-rich tungsten boride was determined using computational techniques, showing a two-phase system. The ab initio calculations of the energies of various structures with similar X-ray diffraction (XRD) patterns allowed us to determine the composition of the formed higher tungsten boride. We determined the optimal parameters of synthesis to obtain samples with 61.5% WB5–x by volume. The transmission electron microscopy measurements showed that 90% of the particles have sizes of up to 100 nm, whereas the rest of them may have sizes from 125 to 225 nm. Our study shows the possibility of using the proposed vacuumless method as an efficient and inexpensive way to synthesize superhard WB5–x without employing resource-consuming vacuum techniques.

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Section: Introductionmentioning

confidence: 99%

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

et al. 2022

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“…Electric arc synthesis was carried out in an open air [23][24]. A direct current energy source with a maximum operating current of 220 A was used.…”

Section: Electric Arc Discharge Synthesismentioning

confidence: 99%

“…The relatively high oxygen content could be associated with its presence in the initial biochar, incomplete processing of the initial silicon dioxide, and the presence of an amorphous oxide shell on the surface of silicon carbide particles. The formation of an amorphous oxide layer on the surface of micro-and nanoparticles of silicon carbide is a well-known phenomenon, and is characteristic for materials both obtained by electric arc discharge plasma in atmospheric air [23] or inert gas [30][31][32].…”

Section: Arc Discharge Synthesismentioning

confidence: 99%

“…However, a group of vacuum-free electric arc methods has appeared recently. In our previous works the synthesis of silicon and tungsten carbides in the plasma of a DC arc discharge in air [23] was executed. This synthesis method application was possible because of selfshielding of the reaction zone by formed carbon monoxide and dioxide [24].…”

Section: Introductionmentioning

confidence: 99%

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Advanced Arc Plasma Synthesis of Biomorphic Silicon Carbide Using Charcoal and Silicon Dioxide in Air

Pak

Ларионов

Korchagina

et al. 2021

Preprint

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The paper presents the results of experimental studies on the advanced synthesis method for a cubic phase of silicon carbide using charcoal and silicon dioxide as precursors. The charcoal used for the synthesis was obtained by steam pyrolysis of wood wastes (sawdust). It was found that the arc synthesis could be executed in air due to the protective CO and CO2 environment formation by charcoal oxidation. With an increase of the amount of supplied energy by direct current arc plasma synthesis, the products of two crystalline phases were formed: graphite and cubic phase of silicon carbide. The phase of silicon carbide was extracted from the synthesis product by its annealing in air at 850 °C. The resulting cubic SiC phase was characterized by an elementary cell parameter of 4.359 Å. According to the data of scanning electron microscopy, the morphology of crystals obtained is common for the biomorphic silicon carbide which was identified in the synthesis product. The ceramics synthesized by spark plasma sintering from the obtained material was characterized by a density of ~2.0 g/cm3.

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“…For instance, the art of pre-patterning the substrate in the bottom-up approach along with the vapor-liquidsolid growth process yields a well-defined ordered array of vertically aligned NWs [12,13]. However, the commonly adapted NW synthesis processes are discharge [14], cation exchange [15], chemical vapor deposition [16], electrodeposition [17], laser ablation [18], selected-control deposition [16], the sol-gel method [19], thermal decomposition [20], and template methods [21,22]. Among these techniques, the template-assisted method, particularly porous anodic aluminum oxide (AAO, i.e., Al 2 O 3 ), has been extensively reported due to its simple fabrication process and low cost [21].…”

Section: Introductionmentioning

confidence: 99%

Tailoring InSb Nanowires for High Thermoelectric Performance Using AAO Template-Assisted Die Casting Process

Vivekanandan

Lee

et al. 2022

Nanomaterials

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Herein, we demonstrate a facile technique for the fabrication of one-dimensional indium antimonide (InSb) nanowires using anodic aluminium oxide (AAO) template-assisted vacuum die-casting method. The filling mechanism of the vacuum die-casting process is investigated on varying AAO pore structures through different electrolytes. It is found that the anodizing electrolytes play a vital role in nanowire growth and structure formation. The as-obtained InSb nanowires from the dissolution process show a degree of high crystallinity, homogeneity, and uniformity throughout their structure. The TEM and XRD results elucidated the InSb zinc-blende crystal structure and preferential orientation along the c-axis direction. The thermoelectric characteristics of InSb nanowires were measured with a four-electrode system, and their resistivity, Seebeck coefficient, power factor, thermal conductivity, and ZT have been evaluated. Further, surface-modified nanowires using the reactive-ion etching technique showed a 50% increase in thermoelectric performance.

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Cubic SiC nanowire synthesis by DC arc discharge under ambient air conditions

Cited by 40 publications

References 37 publications

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Advanced Arc Plasma Synthesis of Biomorphic Silicon Carbide Using Charcoal and Silicon Dioxide in Air

Tailoring InSb Nanowires for High Thermoelectric Performance Using AAO Template-Assisted Die Casting Process

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Cubic SiC nanowire synthesis by DC arc discharge under ambient air conditions

Cited by 40 publications

References 37 publications

Efficient Synthesis of WB5–x–WB2 Powders with Selectivity for WB5–x Content

Efficient Synthesis of WB5–x–WB2 Powders with Selectivity for WB5–x Content

Advanced Arc Plasma Synthesis of Biomorphic Silicon Carbide Using Charcoal and Silicon Dioxide in Air

Tailoring InSb Nanowires for High Thermoelectric Performance Using AAO Template-Assisted Die Casting Process

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Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content

Efficient Synthesis of WB_5–x–WB₂ Powders with Selectivity for WB_5–x Content