%0 Journal Article
%T The field
%A Fitrian Imaduddin
%A Norzilawati Mohamad
%A Saiful Amri Mazlan
%A Seung-Bok Choi
%A Siti Aishah Abdul Aziz
%A Ubaidillah
%J Journal of Intelligent Material Systems and Structures
%@ 1530-8138
%D 2019
%R 10.1177/1045389X19828504
%X The field-dependent viscoelastic and transient behaviours of plate-like-carbonyl-iron-particle-based magnetorheological greases are experimentally investigated in this study. The plate-like carbonyl-iron particles are made from spherical carbonyl-iron particles through a milling process using a rotary ball mill. Several samples of magnetorheological greases consisting of different weight percentages of plate-like carbonyl-iron particles are prepared. The surface microstructures and distributions of the plate-like carbonyl-iron particles in the grease are observed using various types of microscopic investigations. Subsequently, the viscoelastic and transient (dynamic) rheological properties of the plate-like carbonyl-iron particles are investigated using a commercial rheometer. The spherical carbonyl-iron particles are transformed into the flattened plate-like carbonyl-iron particles with a larger surface diameter. It is shown that the viscoelastic properties such as storage modulus and response time of the plate-like carbonyl-iron particles significantly depend on the shape and particle weight fraction. The findings reveal that the shape of the carbonyl-iron particles has a significant effect on the field-dependent behaviours. Thus, the results presented in this work provide very useful scientific contributions for devising appropriate applications utilizing the plate-like-carbonyl-iron-particle-based magnetorheological greases
%K Magnetorheological grease
%K transient response
%K spherical particle
%K plate-like particle
%K microstructure
%K viscoelastic properties
%U https://journals.sagepub.com/doi/full/10.1177/1045389X19828504