Fabrication and characterization of the orientated MMT/PI composite films via relatively low magnetic field

2014 ◽  
Vol 132 (1) ◽  
Author(s):  
Fengzhu Lv ◽  
Linan Xu ◽  
Zixian Xu ◽  
Liling Fu ◽  
Yihe Zhang
Keyword(s):  
Magnetic Field ◽  
Composite Films ◽  
Fabrication And Characterization ◽  
Low Magnetic Field

Low magnetic field induced strong magnetoelectric coupling in three phase composite films with ferroelectric domain switchability

2020 ◽  
Vol 46 (10) ◽  
pp. 16598-16604
Author(s):  
Amit Kumar ◽  
Sandeep Saini ◽  
K.L. Yadav ◽  
Mohammad Azam ◽  
Ishtiaq Ahmed ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Composite Films ◽  
Ferroelectric Domain ◽  
Magnetoelectric Coupling ◽  
Three Phase ◽  
Low Magnetic Field

HIGH VERSUS LOW FIELD VISCOMETRIC CHARACTERIZATION OF BIDISPERSE MR FLUIDS

2007 ◽  
Vol 21 (28n29) ◽  
pp. 4922-4928 ◽  
Author(s):  
G. T. NGATU ◽  
N. M. WERELEY
Keyword(s):  
Magnetic Field ◽  
Yield Stress ◽  
High Field ◽  
Magnetic Flux Density ◽  
Flow Curves ◽  
Bingham Plastic ◽  
Low Field ◽  
Mr Fluids ◽  
Low Magnetic Field

Our bidisperse magnetorheological fluids are suspensions of micron (2-10μm) and nanometer (~40nm) scale magnetic iron particles in silicone or hydraulic oil. Earlier studies were conducted to determine the yield stress of these fluids at low magnetic field induction. These studies have shown the absence of saturation yield stress implying the possibility of a higher yield stress by increasing the applied field. In this study, three different bidisperse MR fluids were investigated to determine the maximum available yield stress that can be obtained at or near saturation magnetic flux density. The iron loading in the fluids varied from 50% to 80% by weight. Two types of MR cells, a low field and a high field cells, were used for the investigation. Using a parallel disc rheometer alternatively equipped with one of the two MR cells, the flow curves of the MR fluids were obtained and their yield stress determined. The yield stress of the MR fluids as a function of applied magnetic field was identified using the Bingham-Plastic constitutive model. Results show that the high field cell (maximum 1 Tesla) was able to measure shear stress up to saturation, whereas the low field cell (maximum 0.26 Tesla) could not.

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