Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease
Magnetorheological grease (MRG) is one of the smart materials that experiences a high off state viscosity, which hassles the operation of devices at the beginning and causes more energy consumption upon operation. Therefore, this paper investigates the off-state viscosity of MR lithium-based grease...
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| Format: | Article |
| Language: | English English |
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Journal of Materials Research and Technology
2020
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| Online Access: | https://eprints.ums.edu.my/id/eprint/27126/1/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease.pdf https://eprints.ums.edu.my/id/eprint/27126/2/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease1.pdf |
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| author | S.M.A. Tarmizi N.A. Nordin S.A. Mazlan Norzilawati Mohamad H.A. Rahman S.A.A. Aziz N. Nazmi M.A. Azmi |
| author_facet | S.M.A. Tarmizi N.A. Nordin S.A. Mazlan Norzilawati Mohamad H.A. Rahman S.A.A. Aziz N. Nazmi M.A. Azmi |
| author_sort | S.M.A. Tarmizi |
| collection | UMS |
| description | Magnetorheological grease (MRG) is one of the smart materials that experiences a high off state viscosity, which hassles the operation of devices at the beginning and causes more energy consumption upon operation. Therefore, this paper investigates the off-state viscosity of MR lithium-based grease with various percentages of cobalt ferrite (CoFe2O4), as these particles are believed to potentially enhance the field-dependent stress of MRG by reducing the off-state viscosity and increasing mobility of the magnetic particles as the magnetic field applied. The MRG with various concentrations of CoFe2O4 at a ratio of 1 e5 wt.% were investigated via Field-Emission Scanning Electron Microscopy (FESEM) and Vibrating Sample Magnetometer (VSM) to analyze their morphology and magnetic properties, respectively. The rheological test of MRG samples in terms of viscosity, shear stress and yield stress were investigated upon shear rate, using rheometer. The results demonstrated that with the incorporation of 5wt.% CoFe2O4 particles, the initial off-state viscosity was reduced by 86% as compared to the pure MRG. The presence of CoFe2O4 particles triggered more chaotic motion thus restricted the formation of agglomeration of particles during shearing process. Meanwhile, the initial viscosity of MRG increased as a 0.64 T of magnetic field was applied along with the increased of CoFe2O4 particles. In fact, there was an enhancement of shear stress and yield stress on the CoFe2O4 incorporated MRG samples as compared with pure MRG. This study underlined the influence of CoFe2O4 particles, which could reduce the initial viscosity of MRG and improve the rheological properties upon the application of magnetic field. |
| first_indexed | 2024-03-06T03:06:54Z |
| format | Article |
| id | ums.eprints-27126 |
| institution | Universiti Malaysia Sabah |
| language | English English |
| last_indexed | 2024-03-06T03:06:54Z |
| publishDate | 2020 |
| publisher | Journal of Materials Research and Technology |
| record_format | dspace |
| spelling | ums.eprints-271262021-06-02T04:25:48Z https://eprints.ums.edu.my/id/eprint/27126/ Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease S.M.A. Tarmizi N.A. Nordin S.A. Mazlan Norzilawati Mohamad H.A. Rahman S.A.A. Aziz N. Nazmi M.A. Azmi T Technology (General) TA Engineering (General). Civil engineering (General) Magnetorheological grease (MRG) is one of the smart materials that experiences a high off state viscosity, which hassles the operation of devices at the beginning and causes more energy consumption upon operation. Therefore, this paper investigates the off-state viscosity of MR lithium-based grease with various percentages of cobalt ferrite (CoFe2O4), as these particles are believed to potentially enhance the field-dependent stress of MRG by reducing the off-state viscosity and increasing mobility of the magnetic particles as the magnetic field applied. The MRG with various concentrations of CoFe2O4 at a ratio of 1 e5 wt.% were investigated via Field-Emission Scanning Electron Microscopy (FESEM) and Vibrating Sample Magnetometer (VSM) to analyze their morphology and magnetic properties, respectively. The rheological test of MRG samples in terms of viscosity, shear stress and yield stress were investigated upon shear rate, using rheometer. The results demonstrated that with the incorporation of 5wt.% CoFe2O4 particles, the initial off-state viscosity was reduced by 86% as compared to the pure MRG. The presence of CoFe2O4 particles triggered more chaotic motion thus restricted the formation of agglomeration of particles during shearing process. Meanwhile, the initial viscosity of MRG increased as a 0.64 T of magnetic field was applied along with the increased of CoFe2O4 particles. In fact, there was an enhancement of shear stress and yield stress on the CoFe2O4 incorporated MRG samples as compared with pure MRG. This study underlined the influence of CoFe2O4 particles, which could reduce the initial viscosity of MRG and improve the rheological properties upon the application of magnetic field. Journal of Materials Research and Technology 2020 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/27126/1/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease.pdf text en https://eprints.ums.edu.my/id/eprint/27126/2/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease1.pdf S.M.A. Tarmizi and N.A. Nordin and S.A. Mazlan and Norzilawati Mohamad and H.A. Rahman and S.A.A. Aziz and N. Nazmi and M.A. Azmi (2020) Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease. Journal of Materials Research and Technology, 9 (6). pp. 15566-15574. ISSN 2238-7854 file:///C:/Users/user/Downloads/1-s2.0-S2238785420319955-main.pdf |
| spellingShingle | T Technology (General) TA Engineering (General). Civil engineering (General) S.M.A. Tarmizi N.A. Nordin S.A. Mazlan Norzilawati Mohamad H.A. Rahman S.A.A. Aziz N. Nazmi M.A. Azmi Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title | Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title_full | Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title_fullStr | Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title_full_unstemmed | Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title_short | Incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| title_sort | incorporation of cobalt ferrite on the field dependent performances of magnetorheological grease |
| topic | T Technology (General) TA Engineering (General). Civil engineering (General) |
| url | https://eprints.ums.edu.my/id/eprint/27126/1/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease.pdf https://eprints.ums.edu.my/id/eprint/27126/2/Incorporation%20of%20cobalt%20ferrite%20on%20the%20field%20dependent%20performances%20of%20magnetorheological%20grease1.pdf |
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