Anomalous and Instable Ultrasonic Evidence for a Structural Phase Transition at the Critical Value Vc in Electrorheological Suspensions
American Journal of Modern Physics
Volume 8, Issue 3, May 2019, Pages: 37-39
Received: Jun. 15, 2019;
Accepted: Jul. 26, 2019;
Published: Aug. 23, 2019
Views 38 Downloads 12
Zhang Yue, Department of Physics, Hunan Normal University, Changsha, China
Follow on us
Using the sample cell designed by ourselves and the electrorheological (ER) samples, one of them is imported from USA (sample 1), the other one is made from tsinghua university (sample2), we perform a series experiments with these two ER samples, and observe some curious phenomena; such as the ultrasonic study on the longitudinal sound velocity in electrorheological (ER) suspensions reveals the existence of a serious shear instability at the critical value of applied voltages, the evidence retains the time of about a few milliseconds; moreover, the experiments on ER samples demonstrate that there is a saturation value for the ultrasonic attenuation when the applied voltages arrive a critical value Vc, which resemble to the cases of a lot of superconductors at the critical value of temperature Tc; In the experiments on the I-V characteristic of the two ER samples, we observe that an abrupt change in the I-V characteristics occurs at the critical value Vc of the applied voltages, furthermore, the I-V characteristic of either of the two ER samples is linear after the applied voltages overpass the critical value Vc, just as same as the I-V characteristic of metal conductors. Therefore, it is reasonable to suggest that this anomalous ultrasonic evidence we observed in the experiments corresponds to a structural phase transition from liquidlike phase to metal-solidlike phase in the electrorheological suspensions.
Electrorheological Suspension, Anomalous Ultrasonic Evidence, Attenuation, I-V Characteristics, Phase Transition
To cite this article
Anomalous and Instable Ultrasonic Evidence for a Structural Phase Transition at the Critical Value Vc in Electrorheological Suspensions, American Journal of Modern Physics.
Vol. 8, No. 3,
2019, pp. 37-39.
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Winslow W M. Induced Fibration of Suspensions [J]. J. Appl. of Physics, 1949, 20: 1137-1140.
Block H and Kelly J P. Electronheological Fluids: U. S. 4687589 [P]. 1987- 08-18.
Filisko F E and Armstrong W E. Electric Field Dependent Fluids: U. S. 4744914 [P]. 1988- 05-17.
Jaggi N K and Woestman J. On the Nature of Electric Field Induced Solification in Some Two Phase Systems [J]. Bull. Amer. Phys. Soc. 1989, 34 (3): 1019.
Halsey T C and Toor W. Structure of Electrorheological Fluids [J]. Phys. Rev. Lett., 1990, 65 (22): 2820 -2823.
Klingenberg D J, Swol F V and Zukoski C F J. Dynamic Simulation of Electrorheological Suspensions [J]. J. Chem. Phys. 1989, 91 (12): 7888 -7894.
Gonon P and Foulc J-N. Temperature Dependence of Particle-Particle Interactions in Electrorheological Fluids [J]. J. of Appl. Phys., 2000, 87 (7): 3563-3566.
Wu C W and Conrad H. Multi-Coated Spheres: Recommended Electrorheological Particles [J]. J. Phys. D: Appl. Phys, 1998, 31: 3312 -3315.
Tang X, Wu C, and Conrad H. On the Conductivity Model for the Electrorheological Response of Dielectric Particles with a Conducting Film [J]. J. Appl. Phys, 1995, 78 (6): 4183- 4188.
Kolobko E V, Zhurauski M A, and Novikova Z A. Viscoelestic Properties of Composite Electrorheological Suspensions [J]. Current Smart Materials, 2017, 2 (1): 12-19.
Agafonov A V, Kraev A S, Ivanova O S, et al. Comparative Study of the Electrorheological Effect in Suspensions of Needlelike and Isotropic Cerium Dioxide Nanoparticles [J]. Rheologica Acta, 2018, 57 (4): 307-315.
Choi S B. Selected Papers from the 15th International Conference on Electrorheological Fluids and Magnetorheological Suspensions (ERME 2016) [J]. Smart Materials and Structures, 2017, 26 (5): 050201.
Mvlik M, LLcokova M, Osicka J, and Kutalkova E. Electrorheology of Si-ATRP-Modified Graphene Oxide Particles and Compatibility with Silicone Oil [J]. RSC Advances, 2019, 9 (3): 1187-1198.
Roy R A and Richardson J. Ultrasonic Propagation in Electrorheological Suspensions [J]. J. Acoust. Soc. Amer., 1990, 87: S85.
Toulouse J, Wang X M and Hong D J L. Ultrasonic Evidence for a structural Phase Transition at 220K in YBa2Cu3O7−δ [J]. Phys. Rev. B, 1988, 38 (10): 7077-7079.