- Engineering, Chemical.
- Reddy, Naveen Krishna.
- McGill University
- Electronic Thesis or Dissertation
- alephsysno: 002600997
- proquestno: AAIMR32616
- © Naveen Krishna Reddy, 2006
- Master of Engineering (Department of Chemical Engineering.)
- Cathode erosion under the action of an electric arc
is a major problem in plasma torches. The reduction of cathode
erosion through the development of superior cathode materials would
result in more economical operation of plasma torches. Carbon
nanotubes have favorable electron emission properties; they are
studied here for the fabrication of superior cathode
- In this work, the growth of carbon nanotubes (CNT)
using thermal CVD is studied on different metal and metal alloy
electrodes. Electroless Ni coated on Monel substrates and Ni
deposited Si wafer substrates with 20 nm Cr under layer gave the
highest density of CNT growth. Variations of the CNT coverage
density was observed when varying the surface roughness on pure Ni
and Monel with various degree of polishing prior to the CNT growth.
Cupro-Nickel alloys and electroless Ni plated Cu did not show to be
favorable for the growth of CNT. Tests on the growth of CNT in a
PECVD reactor were not successful; the transport of the carbon
precursor to the electrodes still needs further study. Other
applications such as the use of the CNT layer as a nanoparticle
filter and collector, the formation of a CNT-nanoparticle composite
film, the growth of a 3D structure of a multi-branched CNT, and the
growth of CNT on alloy meshes were also studied and discussed in
- Master of Engineering (Department of Chemical
- Theses scanned by UMI/ProQuest.
- Instructions in case access is denied
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