Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature

In the current-assisted sintering technique, graphite is mainly used to fabricate die and other components (such as electrodes and spacers) because of its excellent thermoelectric properties, high melting point and high ratio of the tensile strength to the compressive strength. As widely known, grap...

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Main Authors: Al-Jothery, H.K.M., Albarody, T.M.B., Megat-Yusoff, P.S.M., Al-Shaibani, N., Mohammed, H.G.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23705 /
Published: Universiti Malaysia Pahang 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110552474&doi=10.15282%2fijame.18.2.2021.16.0672&partnerID=40&md5=ecca985f14ec15010e6e67d848c783aa
http://eprints.utp.edu.my/23705/
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spelling utp-eprints.237052021-08-19T09:14:45Z Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature Al-Jothery, H.K.M. Albarody, T.M.B. Megat-Yusoff, P.S.M. Al-Shaibani, N. Mohammed, H.G. In the current-assisted sintering technique, graphite is mainly used to fabricate die and other components (such as electrodes and spacers) because of its excellent thermoelectric properties, high melting point and high ratio of the tensile strength to the compressive strength. As widely known, graphite is one of the brittle materials, and the failure is difficult to be anticipated before it happens. Besides, there is a lack of information about the effects of sintering process, environment and impurity on the graphite structure of the furnace, especially the die, which is the weakest part of the graphite structure. Therefore, the effects of electrical field and oxidation on the graphite die of microwave-current assisted sintering apparatus were investigated at a high temperature of 600�1900°C based on physical characteristics and mechanical strength. In this article, the spark discharge phenomenon was experimentally proved during the sintering process of nonconductive material. The tensile strength of the upper punch after the sintering process was 20.2 higher than the pristine one because of the transforming of micro-graphite to carbon nanotubes which increased with increasing the temperature. On the other hand, the tensile strengths of graphite lower punch and sleeve were slightly dropped. While, the oxidation of GW-6S graphite in the air caused a mass loss that led to the reduction in tensile and compressive strengths. © The Authors 2021. Published by Penerbit UMP. This is an open access article under the CC BY license. Universiti Malaysia Pahang 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110552474&doi=10.15282%2fijame.18.2.2021.16.0672&partnerID=40&md5=ecca985f14ec15010e6e67d848c783aa Al-Jothery, H.K.M. and Albarody, T.M.B. and Megat-Yusoff, P.S.M. and Al-Shaibani, N. and Mohammed, H.G. (2021) Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature. International Journal of Automotive and Mechanical Engineering, 18 (2). pp. 8781-8789. http://eprints.utp.edu.my/23705/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description In the current-assisted sintering technique, graphite is mainly used to fabricate die and other components (such as electrodes and spacers) because of its excellent thermoelectric properties, high melting point and high ratio of the tensile strength to the compressive strength. As widely known, graphite is one of the brittle materials, and the failure is difficult to be anticipated before it happens. Besides, there is a lack of information about the effects of sintering process, environment and impurity on the graphite structure of the furnace, especially the die, which is the weakest part of the graphite structure. Therefore, the effects of electrical field and oxidation on the graphite die of microwave-current assisted sintering apparatus were investigated at a high temperature of 600�1900°C based on physical characteristics and mechanical strength. In this article, the spark discharge phenomenon was experimentally proved during the sintering process of nonconductive material. The tensile strength of the upper punch after the sintering process was 20.2 higher than the pristine one because of the transforming of micro-graphite to carbon nanotubes which increased with increasing the temperature. On the other hand, the tensile strengths of graphite lower punch and sleeve were slightly dropped. While, the oxidation of GW-6S graphite in the air caused a mass loss that led to the reduction in tensile and compressive strengths. © The Authors 2021. Published by Penerbit UMP. This is an open access article under the CC BY license.
format Article
author Al-Jothery, H.K.M.
Albarody, T.M.B.
Megat-Yusoff, P.S.M.
Al-Shaibani, N.
Mohammed, H.G.
spellingShingle Al-Jothery, H.K.M.
Albarody, T.M.B.
Megat-Yusoff, P.S.M.
Al-Shaibani, N.
Mohammed, H.G.
Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
author_sort Al-Jothery, H.K.M.
title Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
title_short Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
title_full Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
title_fullStr Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
title_full_unstemmed Experimental Investigations on Microwave-Current Assisted Sintering Process and Oxidation of Graphite Die at High Temperature
title_sort experimental investigations on microwave-current assisted sintering process and oxidation of graphite die at high temperature
publisher Universiti Malaysia Pahang
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110552474&doi=10.15282%2fijame.18.2.2021.16.0672&partnerID=40&md5=ecca985f14ec15010e6e67d848c783aa
http://eprints.utp.edu.my/23705/
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score 11.62408

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