Viscosity of a suspension of ellipsoidal ferromagnetic particles in a magnetic field

1975 ◽  
Vol 14 (5) ◽  
pp. 664-669 ◽  
Author(s):  
M. A. Martsenyuk
Keyword(s):  
Magnetic Field ◽  
Ferromagnetic Particles

Structural Optimization Design of MR Fluid Clutch

2007 ◽  
Vol 546-549 ◽  
pp. 1673-1676 ◽  
Author(s):  
Wei Jia Meng ◽  
Zhan Wen Huang ◽  
Yan Ju Liu ◽  
Xiao Rong Wu ◽  
Yi Sun
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Element Analysis ◽  
Mr Fluids ◽  
Magneto Rheological ◽  
Ferromagnetic Fluids ◽  
Ferromagnetic Particles

Magnetorheological (MR) fluids are suspensions of micron sized ferromagnetic particles dispersed in varying proportions of a variety of non-ferromagnetic fluids. MR fluids exhibit rapid, reversible and significant changes in their rheological (mechanical) properties while subjected to an external magnetic field. In this paper, a double-plate magneto-rheological fluid (MRF) clutch with controllable torque output have been designed. Electromagnetic finite element analysis is used to optimize the design of the clutch by using the commercial FEA software ANSYS.

scholarly journals Composite multiferroic materials consisting of NdFeB and PZT particles embedded in elastic matrix: the appearance of electrical polarization in a constant magnetic field

2018 ◽  
Vol 185 ◽  
pp. 07008
Author(s):  
Liudmila Makarova ◽  
Yuliya Alekhina ◽  
Elena Kramarenko ◽  
Alexander Omelyanchik ◽  
Valeria Rodionova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Composite Materials ◽  
Constant Magnetic Field ◽  
Mass Concentration ◽  
Remanent Polarization ◽  
Energy Sources ◽  
New Materials ◽  
Multiferroic Materials ◽  
Electrical Polarization ◽  
Ferromagnetic Particles

New composite materials consisting of polymer matrix with PZT and NdFeB microparticles were prepared and investigated in the work. It was found that magnetic properties such as saturation magnetization, coercivity, permeability, depend on mass concentration of the ferromagnetic particles in the samples. Also it was found that all samples had electrical polarization in DC external electric field. The electric properties such as coercivity, remanent polarization, the maximum polarization value, had changes in the external constant magnetic field 1.1 kOe. These changes depended on both concentrations of ferromagnetic and ferroelectric particles. This type of magnetoelectric transformation allows us to classify new materials as multiferroic materials. These new composite materials can easily be prepared of any shape, the final materials are flexible and resistant to external chemical influences. The area of application of new multiferroic materials varies from sensors to autonomous energy sources.

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