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

Alexander Pak, Alexander Ivashutenko, Alena Zakharova, Yuliya Vassilyeva

Research output: Contribution to journalArticle

Abstract

Silicon carbide (SiC) is a widely used material characterized by unique physical and chemical properties. In the paper, cubic silicon carbide nanowires are synthesized via the non-vacuum DC (direct current) arc discharge method. DC arc is generated between the graphite rod and the graphite crucible under ambient air conditions without any vacuum or applying special defenses to the used atmosphere equipment. According to experimental data, the percentage of silicon carbide of the total product in interval from 70 A to 100 A increases from 3.9% up to 26.7% (mass), and in interval from 130 A to 200 A of arc discharge current decreases from 26.1% down to 19.9% (mass). The silicon carbide wires are characterized by the typical core-shell SiC–SiOx structure. It is possible to control the phase composition and increase the yield of SiC by changing the arc discharge current amplitude. The optimal synthesis parameters using the DC source with the maximum current of 200 A are a current of 200 A, synthesis time of 12 s and a silicon fraction in the initial mixture not more than 25% (mass) to completely process the initial silicon into its carbide.

Original languageEnglish
Article number125554
JournalSurface and Coatings Technology
Volume387
DOIs
Publication statusPublished - 15 Apr 2020

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Keywords

  • Ambient air conditions
  • DC Arc discharge
  • Nanowire
  • Silicon carbide
  • Synthesis

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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