Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride

The effect of using sulphur hexafluoride (SF6), a high-dielectric-strength gas, for dry micro-electro-discharge machining (μEDM) of carbon-nanotube (CNT) forests is investigated. It is found that SF6 enables μEDM of CNTs without O2, which is known to be essential for CNT machining in N2. The process...

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Main Authors:	Saleh, Tanveer, Dahmardeh, Masoud, Nojeh, Alireza, Takahata, Kenichi
Format:	Article
Language:	English
Published:	Elsevier Limited 2013
Subjects:	QC Physics
Online Access:	http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/1/Dry_micro-electro-discharge_machining_of_carbon-nanotube.pdf

id	iium-26832
recordtype	eprints
spelling	iium-268322018-05-24T07:05:47Z http://irep.iium.edu.my/26832/ Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride Saleh, Tanveer Dahmardeh, Masoud Nojeh, Alireza Takahata, Kenichi QC Physics The effect of using sulphur hexafluoride (SF6), a high-dielectric-strength gas, for dry micro-electro-discharge machining (μEDM) of carbon-nanotube (CNT) forests is investigated. It is found that SF6 enables μEDM of CNTs without O2, which is known to be essential for CNT machining in N2. The process in the SF6 ambient at a discharge voltage of 25 V is found to lead to a smaller discharge gap, i.e., tighter tolerance as well as higher machining quality compared with the N2 case at the same voltage. The N2 environment produces smaller discharge gap when 10 V is used; however, both the quality and rate of machining are somewhat lower in this case. The mixture with 20% O2 in SF6 is revealed to be an optimum condition for machining tolerance and quality. CNT forests are used as the cathode in the process, as opposed to conventional μEDM where the workpiece forms the anode. This configuration in the SF6–O2 mixture is observed to generate higher discharge currents at low voltages, presumably due to effective field-emission by the CNTs, leading to finer and cleaner machining. Energy-dispersive X-ray analysis reveals that the optimal conditions result in less contamination by the electrode element on the processed forest surfaces. Elsevier Limited 2013 Article PeerReviewed application/pdf en http://irep.iium.edu.my/26832/1/Dry_micro-electro-discharge_machining_of_carbon-nanotube.pdf Saleh, Tanveer and Dahmardeh, Masoud and Nojeh, Alireza and Takahata, Kenichi (2013) Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride. Carbon, 52. pp. 288-295. ISSN 0008-6223 http://www.sciencedirect.com/science/article/pii/S0008622312007671 10.1016/j.carbon.2012.09.030
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	QC Physics
spellingShingle	QC Physics Saleh, Tanveer Dahmardeh, Masoud Nojeh, Alireza Takahata, Kenichi Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
description	The effect of using sulphur hexafluoride (SF6), a high-dielectric-strength gas, for dry micro-electro-discharge machining (μEDM) of carbon-nanotube (CNT) forests is investigated. It is found that SF6 enables μEDM of CNTs without O2, which is known to be essential for CNT machining in N2. The process in the SF6 ambient at a discharge voltage of 25 V is found to lead to a smaller discharge gap, i.e., tighter tolerance as well as higher machining quality compared with the N2 case at the same voltage. The N2 environment produces smaller discharge gap when 10 V is used; however, both the quality and rate of machining are somewhat lower in this case. The mixture with 20% O2 in SF6 is revealed to be an optimum condition for machining tolerance and quality. CNT forests are used as the cathode in the process, as opposed to conventional μEDM where the workpiece forms the anode. This configuration in the SF6–O2 mixture is observed to generate higher discharge currents at low voltages, presumably due to effective field-emission by the CNTs, leading to finer and cleaner machining. Energy-dispersive X-ray analysis reveals that the optimal conditions result in less contamination by the electrode element on the processed forest surfaces.
format	Article
author	Saleh, Tanveer Dahmardeh, Masoud Nojeh, Alireza Takahata, Kenichi
author_facet	Saleh, Tanveer Dahmardeh, Masoud Nojeh, Alireza Takahata, Kenichi
author_sort	Saleh, Tanveer
title	Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
title_short	Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
title_full	Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
title_fullStr	Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
title_full_unstemmed	Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
title_sort	dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride
publisher	Elsevier Limited
publishDate	2013
url	http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/ http://irep.iium.edu.my/26832/1/Dry_micro-electro-discharge_machining_of_carbon-nanotube.pdf
first_indexed	2023-09-18T20:39:54Z
last_indexed	2023-09-18T20:39:54Z
_version_	1777409294950465536

Dry micro-electro-discharge machining of carbon-nanotube forests using sulphur-hexafluoride

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