Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 127 (Sept. 2007), p. 319-324
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
In magneto-plasma-dynamic (MPD) arcjet generators, plasma is accelerated byelectromagnetic body forces. Silicon nitride reactive spraying was carried out using an MPDarcjet 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 arcjetgenerator 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 arepetitive frequency of 0.03 Hz with a discharge current of 9 kA and a substrate temperature of 700℃. The Vickers hardness reached about 1300. Furthermore, silicon carbide and aluminumnitride sprayings were conducted with some spraying systems. All results showed that the MPDarcjet generator had high potentials for spraying
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.127.319.pdf
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