Technique of Formation of an Axisymmetric Heterogeneous Flow During Thermal Spraying of Powder Materials

Кузьмин, В. С.; Mikhalchenko, A. A.; Ковалев, О. Б.; Kartaev, E. V.; Rudenskaya, N. A.

doi:10.1007/s11666-011-9701-6

Cited by 36 publications

(9 citation statements)

References 10 publications

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“…The level of anode erosion in such a plasma torch in selected operating mode of the present study is within 10 -9 -10 -11 kg per Coulomb, which provides very low contamination of the powder by erosion products [25].…”

Section: Methodsmentioning

confidence: 67%

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

Kartaev

Emel’kin

Aul’chenko

2017

AIP Conference Proceedings

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Abstract. The experimental and numerical investigations of synthesis of silica (SiO2) nanoparticles from premixed gaseous silicon tetrachloride (SiCl4) and oxygen of dry air in the high-temperature nitrogen flow of plasma-chemical reactor have been carried out. The regime of counter flow jet quenching of high-temperature heterogeneous flow has been utilized. The latter provided a rapid cooling of silica particles under nonequilibrium conditions with substantial temperature gradients. Synthesized silica particles were amorphous, with surface-average size being about 28 nm. The results of numerical calculations are found to agree qualitatively with experimental data.

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Section: Methodsmentioning

confidence: 67%

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

Kartaev

Emel’kin

Aul’chenko

2017

AIP Conference Proceedings

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“…The supersonic plasma torch using air as a carrier gas is developed on the basis of the PNK-50 plasma torch, which is the basic thermal plasma generator of the Thermoplasma 50-03 facilities developed at the ITPM SB RAS [17]. The main element of the plasma torch, which radically distinguishes it from the mass-produced plasma equipment, is the patented radial-ring powder injection unit with gas-dynamic focusing [17].…”

Section: Supersonic Plasma Torch For Spraying Powder Materialsmentioning

confidence: 99%

The Structure and Characteristics of Wear-Resistant Coatings, Obtained by Supersonic Plasma Spraying

Кузьмин¹,

Gulyaev²,

Sergachev³

et al. 2022

KEM

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The characteristics of coatings designed to protect against cavitation and waterjet wear, obtained by supersonic atmospheric plasma spraying using air as a plasma-forming gas, are studied. The following powder materials were selected for coating: WC/10Co4Cr; Ni-Cr-B-Si-C; Ni-Al; Ni-Ti; bronze. Metallographic studies of the structures of specimens with applied coatings and measurements of their microhardness were carried out. Due to the fact that the tests of materials for hydroabrasive wear are not standardized, studies were carried out on the resistance of coatings to dry abrasive wear according to the ASTM G65-04 standard and to dry reciprocating friction according to the ASTM G133 standard. The conducted studies of the structures of the sprayed coatings suggest that the use of supersonic deposition modes guarantees the production of high-density coatings with a porosity of less than 1 %.

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“…The key element of the plasma torch construction is the original unit for annular injection of powder with gas-dynamic focusing (Fig. 1, b) [2]. This injection scheme ensures the material input in the axial part of the plasma flow, which is characterized by the higher values of speed and temperature.…”

Section: The Plasma Torch For Powder Sprayingmentioning

confidence: 99%

Equipment and technologies of air-plasma spraying of functional coatings

et al. 2017

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This article presents a short description of the DC plasma torch "PNK-50" structural features (ITAM SB RAS, Novosibirsk) used for spraying of functional coatings with powder materials as well as gives the results of thermophysical and technological studies of spraying regimes. We present preliminary results of the plasma torch supersonic modification development and the results of industrial approbation of the plasma torch and of multi-purposes functional coatings deposition processes.

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Technique of Formation of an Axisymmetric Heterogeneous Flow During Thermal Spraying of Powder Materials

Cited by 36 publications

References 10 publications

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

The Structure and Characteristics of Wear-Resistant Coatings, Obtained by Supersonic Plasma Spraying

Equipment and technologies of air-plasma spraying of functional coatings

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