Tarmizi, S. M. A. and Nordin, N. A. and Mazlan, S. A. and Ubaidillah, U. and Aziz, S. A. A. and Mohamad, N. and Mohd Hapipi, Norhiwani (2023) Improvement of rheological and transient response of magnetorheological grease with amalgamation of cobalt ferrite. Journal of Materials Research and Technology-JMR&T, 23. pp. 1285-1295. ISSN 2238-7854, DOI https://doi.org/10.1016/j.jmrt.2022.12.154.
Full text not available from this repository.Abstract
The time responsiveness of magnetorheological grease (MRG) towards magnetic field stimulus is crucial in order to ensure the high performance of MR devices. However, due to the thixotropic properties of grease, MRG has been restricted in terms of responding rapidly towards these magnetic fields. Therefore, polygonal shapes made up of 1-3 mm of cobalt -ferrite (CoFe2O4) particles with different concentrations from 0 to 5 wt.% were introduced to enhance the responsiveness of the MRG. The results revealed that the linear viscoelastic (LVE) region of the modified MRG improved between 29% and 43% during the off-state and on-state conditions, respectively. The absolute MR effect of MRG increased by at least 60% due to the improvement in the particle's chain alignment with that of the applied magnetic fields. In terms of transient responses, particularly within the highly acceptable LVE region (0.05%), the MRG with CoFe2O4 performed about 5-6 s faster as compared to pure MRG, which was attributed to the improvement in the particle's mobility in the grease medium.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
| Item Type: | Article |
|---|---|
| Funders: | Universiti Teknologi Malaysia (UTM) Zamalah (Grant No: 0060 N), Universitas Sebelas Maret |
| Uncontrolled Keywords: | Magnetorheological grease; Cobalt ferrite; Additive; Rheological properties; Transient response |
| Subjects: | Q Science > QC Physics T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Centre for Foundation Studies in Science > Physics Division |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 01 Dec 2023 02:02 |
| Last Modified: | 01 Dec 2023 02:02 |
| URI: | http://eprints.um.edu.my/id/eprint/38766 |
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