Optimization of plasma dynamic synthesis of ultradispersed silicon carbide and obtaining SPS ceramics on its basis

Alexander Sivkov, Dmitriy Nikitin, Ivan Shanenkov, Alexander Ivashutenko, Iliyas Rahmatullin, Arthur Nassyrbayev

Research output: Contribution to journalArticle

Abstract

Obtaining SiC ceramics with high physical and mechanical properties requires the use of high purity products with a single crystal structure of particles. Such a product can be obtained by the plasma dynamic synthesis based on using a pulsed arc discharge. This paper presents that the way of an arc discharge ignition significantly influences both the effectiveness of the precursor sublimation and the phase composition of the final ultradispersed product. The arc discharge ignition through a thermal breakdown mechanism is the most efficient way to implement the plasma dynamic synthesis of silicon carbide β-SiC and achieve its yield up to ~99 wt% of the product. The synthesized powder is characterized by a single crystal structure of particles and their average size of ~70 nm. Spark plasma sintering of the as-prepared materials allows improving the ceramics quality in comparison with the ceramics sintered from the commercial silicon carbide. This effect is especially observed at sintering the ceramics with the use of Al-B-C additives, when the higher mechanical characteristics (ρ = 98.8%, H = 26 GPa) are achieved.

Original languageEnglish
Pages (from-to)123-130
Number of pages8
JournalInternational Journal of Refractory Metals and Hard Materials
Volume79
DOIs
Publication statusPublished - 1 Feb 2019

Fingerprint

Silicon carbide
Ignition
Crystal structure
Single crystals
Plasmas
Spark plasma sintering
Sublimation
Phase composition
Powders
Sintering
Physical properties
Mechanical properties
silicon carbide
Hot Temperature

Keywords

  • Ceramics
  • Plasma dynamic synthesis
  • Silicon carbide
  • Single crystal particles
  • Spark plasma sintering
  • Ultradispersed powder

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "Obtaining SiC ceramics with high physical and mechanical properties requires the use of high purity products with a single crystal structure of particles. Such a product can be obtained by the plasma dynamic synthesis based on using a pulsed arc discharge. This paper presents that the way of an arc discharge ignition significantly influences both the effectiveness of the precursor sublimation and the phase composition of the final ultradispersed product. The arc discharge ignition through a thermal breakdown mechanism is the most efficient way to implement the plasma dynamic synthesis of silicon carbide β-SiC and achieve its yield up to ~99 wt{\%} of the product. The synthesized powder is characterized by a single crystal structure of particles and their average size of ~70 nm. Spark plasma sintering of the as-prepared materials allows improving the ceramics quality in comparison with the ceramics sintered from the commercial silicon carbide. This effect is especially observed at sintering the ceramics with the use of Al-B-C additives, when the higher mechanical characteristics (ρ = 98.8{\%}, H = 26 GPa) are achieved.",
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author = "Alexander Sivkov and Dmitriy Nikitin and Ivan Shanenkov and Alexander Ivashutenko and Iliyas Rahmatullin and Arthur Nassyrbayev",
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AU - Sivkov, Alexander

AU - Nikitin, Dmitriy

AU - Shanenkov, Ivan

AU - Ivashutenko, Alexander

AU - Rahmatullin, Iliyas

AU - Nassyrbayev, Arthur

PY - 2019/2/1

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N2 - Obtaining SiC ceramics with high physical and mechanical properties requires the use of high purity products with a single crystal structure of particles. Such a product can be obtained by the plasma dynamic synthesis based on using a pulsed arc discharge. This paper presents that the way of an arc discharge ignition significantly influences both the effectiveness of the precursor sublimation and the phase composition of the final ultradispersed product. The arc discharge ignition through a thermal breakdown mechanism is the most efficient way to implement the plasma dynamic synthesis of silicon carbide β-SiC and achieve its yield up to ~99 wt% of the product. The synthesized powder is characterized by a single crystal structure of particles and their average size of ~70 nm. Spark plasma sintering of the as-prepared materials allows improving the ceramics quality in comparison with the ceramics sintered from the commercial silicon carbide. This effect is especially observed at sintering the ceramics with the use of Al-B-C additives, when the higher mechanical characteristics (ρ = 98.8%, H = 26 GPa) are achieved.

AB - Obtaining SiC ceramics with high physical and mechanical properties requires the use of high purity products with a single crystal structure of particles. Such a product can be obtained by the plasma dynamic synthesis based on using a pulsed arc discharge. This paper presents that the way of an arc discharge ignition significantly influences both the effectiveness of the precursor sublimation and the phase composition of the final ultradispersed product. The arc discharge ignition through a thermal breakdown mechanism is the most efficient way to implement the plasma dynamic synthesis of silicon carbide β-SiC and achieve its yield up to ~99 wt% of the product. The synthesized powder is characterized by a single crystal structure of particles and their average size of ~70 nm. Spark plasma sintering of the as-prepared materials allows improving the ceramics quality in comparison with the ceramics sintered from the commercial silicon carbide. This effect is especially observed at sintering the ceramics with the use of Al-B-C additives, when the higher mechanical characteristics (ρ = 98.8%, H = 26 GPa) are achieved.

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