Spraying Using Electromagnetically Accelerated Plasma

Hirokazu Tahara; Naozumi Yoshimura; Yoji Koshiro

doi:10.4028/www.scientific.net/SSP.127.319

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Spraying Using Electromagnetically Accelerated Plasma
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HomeSolid State PhenomenaSolid State Phenomena Vol. 127Spraying Using Electromagnetically Accelerated...

Spraying Using Electromagnetically Accelerated Plasma

Abstract:

In magneto-plasma-dynamic (MPD) arcjet generators, plasma is accelerated by electromagnetic body forces. Silicon nitride reactive spraying was carried out using an MPD arcjet generator with crystal silicon rods and nitrogen gas. Because higher-velocity, higher-temperature and higher-density and larger-area plasmas are produced with the MPD arcjet generator than those with conventional thermal plasma torches, nitriding of silicon can be enhanced. A dense and uniform β-Si3N4 coating with 30 μm in thickness was formed after 200 shots at a repetitive frequency of 0.03 Hz with a discharge current of 9 kA and a substrate temperature of 700 °C. The Vickers hardness reached about 1300. Furthermore, silicon carbide and aluminum nitride sprayings were conducted with some spraying systems. All results showed that the MPD arcjet generator had high potentials for spraying.

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Periodical:

Solid State Phenomena (Volume 127)

Pages:

319-324

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.127.319

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Cite this paper

Online since:

September 2007

Authors:

Hirokazu Tahara, Naozumi Yoshimura, Yoji Koshiro

Keywords:

Aluminium Nitride Coating, Electromagnetic Force, Electromagnetic Plasma Acceleration, Magneto-Plasma-Dynamic Arcjet Generator, Reactive Plasma Spraying, Silicon Carbide Coating, Silicon Nitride Coating

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