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Possible mechanism in dry micro-electro-discharge machining of carbon-nanotube forests: A study of the effect of oxygen Dahmardeh, Masoud; Nojeh, Alireza; Takahata, Kenichi
Abstract
The working principle of dry micro-electro-discharge machining of vertically aligned carbon-nanotube forests is investigated by evaluating the effect of oxygen on the process. The machining experiments with controlled oxygen/nitrogen ratios indicate a correlation between the peak current of discharge pulses and the oxygen concentration, suggesting not only a vital role for oxygen in the process, but also a removal mechanism fundamentally different from that in typical electro-discharge machining based on direct melting and evaporation of the sample material. The highest surface quality and uniformity in the machined forest microstructures as well as smooth machining without short circuiting are achieved at an approximate oxygen concentration of 20% under the discharge condition of 30 V and 10 pF, revealing that air is an optimal medium for the removal process. Elemental and molecular analyses show no evidence of significant crystalline deterioration or contamination in the nanotubes processed with the technique.
Item Metadata
Title |
Possible mechanism in dry micro-electro-discharge machining of carbon-nanotube forests: A study of the effect of oxygen
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Creator | |
Date Issued |
2011
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Description |
The working principle of dry micro-electro-discharge machining of vertically aligned carbon-nanotube
forests is investigated by evaluating the effect of oxygen on the process. The machining experiments
with controlled oxygen/nitrogen ratios indicate a correlation between the peak current of discharge
pulses and the oxygen concentration, suggesting not only a vital role for oxygen in the process, but also
a removal mechanism fundamentally different from that in typical electro-discharge machining based
on direct melting and evaporation of the sample material. The highest surface quality and uniformity in
the machined forest microstructures as well as smooth machining without short circuiting are achieved
at an approximate oxygen concentration of 20% under the discharge condition of 30 V and 10 pF,
revealing that air is an optimal medium for the removal process. Elemental and molecular analyses
show no evidence of significant crystalline deterioration or contamination in the nanotubes processed
with the technique.
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Genre | |
Type | |
Language |
eng
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Date Available |
2013-05-18
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0070772
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URI | |
Affiliation | |
Citation |
Journal of Applied Physics vol.109, pp. 093308-1 - 093308-4 (2011)
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Publisher DOI |
10.1063/1.3587158
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International