Microstructural analysis on the compatibility of various dilution oils on magnetorheological grease performance

Zheng Bin Pang and Saiful Amri Mazlan and Ubaidillah Ubaidillah and Nur Azmah Nordin and Norzilawati Mohamad and Shahir Yasin Mohd Yusuf and Muntaz Hana Ahmad Khairi and Siti Aishah Abdul Aziz (2024) Microstructural analysis on the compatibility of various dilution oils on magnetorheological grease performance. Engineering Research Express, 6 (3). pp. 1-14.

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Abstract

This research explores the effects of dilution oils on the storage stability of magnetorheological grease (MRG) by studying the effect of dilution oil viscosity on the microstructure of carrier fluids medium for MRG, which can help address practical challenges encountered in the development and deployment of MRG. Three samples of MRG with 70 wt% CIP are prepared; a control, and 2 samples diluted until 10 wt% hydraulic fluid and kerosene respectively. The resulting samples were analysed using a modular compact rheometer (MCR) for oscillatory strain sweep and rotational current sweep. Rheological analyses were repeated after one year in storage. Fourier-Transform Infrared (FTIR) spectroscopy and Atomic Force Microscopy (AFM) results show significant microstructural and performance deterioration of grease thickener in the sample with kerosene, which concludes that kerosene had a very significant effect on the degradation of the grease thickener. From this study, it was revealed that low viscosity oils disrupt the reconstruction of the thickener of lithium grease, which in turn causes deteriorating shear rheological performance of MRG at off-state conditions. This comprehensive analysis explains the relationships between MRG composition, microstructural characteristics, and performance parameters, offering a foundational framework for further exploration and advancement in this scientific field.

Item Type:	Article
Keyword:	Dilution oil, Grease degradation, Infrared spectroscopy, Magnetorheological grease, Microstructure analysis, Compatibility, Rheology
Subjects:	Q Science > Q Science (General) > Q1-390 Science (General) T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General)
Department:	FACULTY > Faculty of Engineering
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	18 Oct 2024 15:48
Last Modified:	18 Oct 2024 15:48
URI:	https://eprints.ums.edu.my/id/eprint/41478

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