eprintid: 14513
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/45/13
datestamp: 2023-11-10 03:29:06
lastmod: 2023-11-10 03:29:06
status_changed: 2023-11-10 01:57:06
type: article
metadata_visibility: show
creators_name: Mohd Nasir, N.A.
creators_name: Nazmi, N.
creators_name: Mohamad, N.
creators_name: Ubaidillah, U.
creators_name: Nordin, N.A.
creators_name: Mazlan, S.A.
creators_name: Abdul Aziz, S.A.
creators_name: Shabdin, M.K.
creators_name: Yunus, N.A.
title: Rheological performance of magnetorheological grease with embedded graphite additives
ispublished: pub
keywords: Additives; Expansion; Graphite; Rheology; Scanning electron microscopy; Viscoelasticity; Viscosity, Apparent viscosity; Application performance; Environmental scanning electron microscopes; Graphite additives; Linear viscoelastic regions; Magnetorheological grease; Magnetorheological grease (MRG); Rheological property, Yield stress
note: cited By 11
abstract: The use of highly viscous grease as a medium in magnetorheological grease (MRG) provides the benefit of avoiding sedimentation from occurring. However, it limits the expansion of yield stress in the on-state condition, thus reducing the application performance during operation. Therefore, in this study, the improvement in the rheological properties of MRG was investigated through the introduction of graphite as an additive. MRG with 10 wt  graphite (GMRG) was fabricated, and its properties were compared to a reference MRG sample. The microstructure of GMRG was characterized using an environmental scanning electron microscope (ESEM). The rheological properties of both samples, including apparent viscosity, yield stress, and viscoelasticity, were examined using a shear rheometer in rotational and oscillatory modes. The results demonstrated a slight increase in the apparent viscosity in GMRG and a significant improvement in yield stress by 38.8 at 3 A with growth about 32.7 higher compared to MRG from 0 to 3 A. An expansion of the linear viscoelastic region (LVE) from 0.01 to 0.1 was observed for the GMRG, credited to the domination of the elastic properties on the sample. These obtained results were confirmed based on ESEM, which described the contribution of graphite to constructing a more stable chain structure in the GMRG. In conclusion, the findings highlight the influence of the addition of graphite on improving the rheological properties of MRG. Hence, the addition of graphite in MRG shows the potential to be applied in many applications in the near future. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
date: 2021
publisher: MDPI
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114640410&doi=10.3390%2fma14175091&partnerID=40&md5=fe1454252e46d241d109dac2c9b0c7db
id_number: 10.3390/ma14175091
full_text_status: none
publication: Materials
volume: 14
number: 17
refereed: TRUE
issn: 19961944
citation:   Mohd Nasir, N.A. and Nazmi, N. and Mohamad, N. and Ubaidillah, U. and Nordin, N.A. and Mazlan, S.A. and Abdul Aziz, S.A. and Shabdin, M.K. and Yunus, N.A.  (2021) Rheological performance of magnetorheological grease with embedded graphite additives.  Materials, 14 (17).   ISSN 19961944