Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 335, Issue -, Pages 149-158Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2013.02.017
Keywords
Magnetorheological fluid; Oscillatory magnetic field; Yield stress; Chain length distribution
Funding
- CONACyT, Mexico [80629]
- CONACyT
Ask authors/readers for more resources
An experimental study conducted on the rheological properties of a magnetorheological fluid based on submicrometric silica-coated magnetite particles dispersed in silicone oil is presented. We investigated the rheological behaviour when the system is simultaneously exposed to a static field and a sinusoidal field used as a perturbation. The results show that the perturbation modifies the rheological behaviour of the system and can be used to control its physical properties; however, the changes that are induced are smaller than expected from previous results for the aggregation of particles under magnetic perturbations. We discussed this difference in terms of the ratio between the magnetic energy and the thermal energy. We observed that a threshold magnetic field exists; below it, the yield stress is practically zero, whereas above it, the yield stress grows quickly. We discuss this result in terms of a model based on chain length distribution. (C) 2013 Elsevier BY. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available