Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease

The incorporation of micro- and nanosized additives offers a significant potential solution to improve the viscous behavior which can minimize energy consumption and surpass pumpability demonstrated by magnetorheological grease (MRG). The role of the additives utilized, on the other hand, has piqued...

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Main Authors: Ahmad Tarmizi, Siti Maisarah, Nordin, Nur Azmah, Mazlan, Saiful Amri, A. Aziz, S. A., Ubaidillah, Ubaidillah, Johari, Mohd. Aidy Faizal, Ahmad Khairi, Muntaz Hana
Format: Article
Language:English
Published: Elsevier B.V. 2024
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Online Access:http://eprints.utm.my/108842/1/SitiMaisarahAhmad2024_RoleofMicroandNanoCobaltFerrite.pdf
http://eprints.utm.my/108842/
http://dx.doi.org/10.1016/j.jmrt.2024.01.219
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Institution: Universiti Teknologi Malaysia
Language: English
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spelling my.utm.1088422024-12-09T07:53:08Z http://eprints.utm.my/108842/ Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease Ahmad Tarmizi, Siti Maisarah Nordin, Nur Azmah Mazlan, Saiful Amri A. Aziz, S. A. Ubaidillah, Ubaidillah Johari, Mohd. Aidy Faizal Ahmad Khairi, Muntaz Hana TJ Mechanical engineering and machinery The incorporation of micro- and nanosized additives offers a significant potential solution to improve the viscous behavior which can minimize energy consumption and surpass pumpability demonstrated by magnetorheological grease (MRG). The role of the additives utilized, on the other hand, has piqued the interest of researchers. Therefore, cobalt-ferrite (CoFe2O4) in micro- (M) and nanosized (N) as an additive incorporated in this study to reduce the initial off-state viscosity and simultaneously maintain the resultant shear and yield stress of MRG during on-state conditions. To analyze the viscous behavior effect of MRG types, the samples underwent rheological tests in different parameters. Then, MRG was dried to elucidate the morphological changes. The results showed that micro-sized additives recorded the lowest off-state viscosity with 43.2 % of reduction, followed by nano-CoFe2O4 (26 %) and pure grease. It is due to M has shortened and disentangled the fibrous structures of grease thickener whilst N has filled in the voids among the thickener which contributed to the discharged of base oil thus reduced the viscosity of MRGs. Meanwhile, at on-state conditions, M1 and N1 exhibited enhanced performances of yield and shear stress as compared to pure MRG, O attributed to the improved magnetic attraction among particles in the grease medium. These findings are beneficial for MRG to be employed in MR devices for various purposes. Elsevier B.V. 2024-03 Article PeerReviewed application/pdf en http://eprints.utm.my/108842/1/SitiMaisarahAhmad2024_RoleofMicroandNanoCobaltFerrite.pdf Ahmad Tarmizi, Siti Maisarah and Nordin, Nur Azmah and Mazlan, Saiful Amri and A. Aziz, S. A. and Ubaidillah, Ubaidillah and Johari, Mohd. Aidy Faizal and Ahmad Khairi, Muntaz Hana (2024) Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease. Journal of Materials Research and Technology, 29 (NA). pp. 3355-3365. ISSN 2238-7854 http://dx.doi.org/10.1016/j.jmrt.2024.01.219 DOI:10.1016/j.jmrt.2024.01.219
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Ahmad Tarmizi, Siti Maisarah
Nordin, Nur Azmah
Mazlan, Saiful Amri
A. Aziz, S. A.
Ubaidillah, Ubaidillah
Johari, Mohd. Aidy Faizal
Ahmad Khairi, Muntaz Hana
Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
description The incorporation of micro- and nanosized additives offers a significant potential solution to improve the viscous behavior which can minimize energy consumption and surpass pumpability demonstrated by magnetorheological grease (MRG). The role of the additives utilized, on the other hand, has piqued the interest of researchers. Therefore, cobalt-ferrite (CoFe2O4) in micro- (M) and nanosized (N) as an additive incorporated in this study to reduce the initial off-state viscosity and simultaneously maintain the resultant shear and yield stress of MRG during on-state conditions. To analyze the viscous behavior effect of MRG types, the samples underwent rheological tests in different parameters. Then, MRG was dried to elucidate the morphological changes. The results showed that micro-sized additives recorded the lowest off-state viscosity with 43.2 % of reduction, followed by nano-CoFe2O4 (26 %) and pure grease. It is due to M has shortened and disentangled the fibrous structures of grease thickener whilst N has filled in the voids among the thickener which contributed to the discharged of base oil thus reduced the viscosity of MRGs. Meanwhile, at on-state conditions, M1 and N1 exhibited enhanced performances of yield and shear stress as compared to pure MRG, O attributed to the improved magnetic attraction among particles in the grease medium. These findings are beneficial for MRG to be employed in MR devices for various purposes.
format Article
author Ahmad Tarmizi, Siti Maisarah
Nordin, Nur Azmah
Mazlan, Saiful Amri
A. Aziz, S. A.
Ubaidillah, Ubaidillah
Johari, Mohd. Aidy Faizal
Ahmad Khairi, Muntaz Hana
author_facet Ahmad Tarmizi, Siti Maisarah
Nordin, Nur Azmah
Mazlan, Saiful Amri
A. Aziz, S. A.
Ubaidillah, Ubaidillah
Johari, Mohd. Aidy Faizal
Ahmad Khairi, Muntaz Hana
author_sort Ahmad Tarmizi, Siti Maisarah
title Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
title_short Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
title_full Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
title_fullStr Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
title_full_unstemmed Role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
title_sort role of micro- and nano-cobalt ferrite as an additive in enhancing the viscous behaviour of magnetorheological grease
publisher Elsevier B.V.
publishDate 2024
url http://eprints.utm.my/108842/1/SitiMaisarahAhmad2024_RoleofMicroandNanoCobaltFerrite.pdf
http://eprints.utm.my/108842/
http://dx.doi.org/10.1016/j.jmrt.2024.01.219
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