scholarly journals Aspects Concerning the Fabrication of Magnetorheological Fluids Containing High Magnetization FeCo Nanoparticles

Fluids ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 132
Author(s):  
Jon Gutiérrez ◽  
Virginia Vadillo ◽  
Ainara Gómez ◽  
Joanes Berasategi ◽  
Maite Insausti ◽  
...  
Keyword(s):  
Recent Literature ◽  
Chemical Reduction ◽  
Collaborative Work ◽  
Magnetorheological Fluid ◽  
Dipolar Interaction ◽  
Fabrication Process ◽  
Superior Performance ◽  
Strong Trend ◽  
Magnetic Dipolar Interaction ◽  
Feco Nanoparticles

Recently, our collaborative work in the fabrication of a magnetorheological fluid (MRF) containing high magnetization FeCo nanoparticles (NPs, fabricated in our laboratories using the chemical reduction technique; MS = 212 Am2/kg) as magnetic fillers have resulted in a new MRF with superior performance up to 616.7 kA/m. The MRF had a yield stress value of 2729 Pa and good reversibility after a demagnetization process. This value competes with the best ones reported in the most recent literature. Nevertheless, the fabrication process of this type of fluid is not an easy task since there is a strong trend to the aggregation of the FeCo NPs due to the strong magnetic dipolar interaction among them. Thus, now we present the analysis of some aspects concerning the fabrication process of our FeCo NPs containing MRF, mainly the type of surfactant used to cover those NPs (oleic acid or aluminium stearate) and its concentration, and the procedure followed (mechanical and/or ultrasound stirring) to achieve a good dispersion of those magnetic fillers within the fluid.

scholarly journals Magnetic dipolar interaction between correlated triplets created by singlet fission in tetracene crystals

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Rui Wang ◽  
Chunfeng Zhang ◽  
Bo Zhang ◽  
Yunlong Liu ◽  
Xiaoyong Wang ◽  
...  
Keyword(s):  
Dipolar Interaction ◽  
Singlet Fission ◽  
Magnetic Dipolar Interaction

Enhanced magnetic behavior of hydrogenated Fe and FeCo nanoparticles prepared by chemical reduction method

2020 ◽  
Author(s):  
Theertharaman G. ◽  
Nibin K. Mathew ◽  
Rohith K. Vinod ◽  
P. Saravanan ◽  
S. Balakumar
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Magnetic Behavior ◽  
Chemical Reduction Method ◽  
Feco Nanoparticles

scholarly journals Effect of a High Magnetic Field on Eutectoid Point Shift and Texture Evolution in 0.81C-Fe Steel

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Y.D. Zhang ◽  
C. Esling ◽  
M. Calcagnotto ◽  
M.L. Gong ◽  
H. Klein ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Texture Evolution ◽  
Transverse Field ◽  
Dipolar Interaction ◽  
Statistical Thermodynamic ◽  
Field Calculation ◽  
Eutectoid Temperature ◽  
Pole Figures ◽  
Magnetic Dipolar Interaction ◽  
The Magnetic Field

A 12 T magnetic field has been applied to the annealing process of a 0.81%C-Fe (wt.%). It is found that the magnetic field shifts the eutectoid carbon content from 0.77 wt.% to 0.83 wt.%. The statistical thermodynamic calculations were performed to calculate the eutectoid temperature change by the magnetic field. Calculation shows that the increase of the eutectoid temperature by a 12 T field is 29∘C. Synchrotron radiation measurements were performed to measure the pole figures of the samples and were analyzed by MAUD to determine the bulk texture of the ferrite phase In the field-treated and non field-treated samples. Results show that although there is no specific preferred orientation appearing by applying the magnetic field, slight enhancement of (001) fiber component occurs in both the sample normal direction (ND) and the transverse direction (TD). This effect might be related to the magnetic dipolar interaction between Fe atoms in the transverse field direction.

Magnetic dipolar interaction in NiFe nanodot arrays formed on vertical carbon nanotubes

2008 ◽  
Vol 19 (47) ◽  
pp. 475703 ◽  
Author(s):  
Chunghee Nam ◽  
Youn-Su Kim ◽  
W B Kim ◽  
B K Cho
Keyword(s):  
Carbon Nanotubes ◽  
Dipolar Interaction ◽  
Nanodot Arrays ◽  
Magnetic Dipolar Interaction

scholarly journals Visualization of magnetic dipolar interaction based on scanning transmission X-ray microscopy

2014 ◽  
Vol 502 ◽  
pp. 012010 ◽  
Author(s):  
Hiroyuki Ohtori ◽  
Kaoru Iwano ◽  
Chiharu Mitsumata ◽  
Yasuo Takeichi ◽  
Masao Yano ◽  
...  
Keyword(s):  
Dipolar Interaction ◽  
X Ray ◽  
Magnetic Dipolar Interaction ◽  
Scanning Transmission

scholarly journals BIM adoption across the Chinese AEC industries: An extended BIM adoption model

2018 ◽  
Vol 6 (2) ◽  
pp. 173-178 ◽  
Author(s):  
Christiane M. Herr ◽  
Thomas Fischer
Keyword(s):  
Construction Industry ◽  
Survey Data ◽  
Recent Literature ◽  
Collaborative Work ◽  
Extended Model ◽  
International Context ◽  
Accurate Representation ◽  
Detailed Survey ◽  
The World ◽  
Adoption Model

Abstract Despite strong encouragement by government guidelines and promoting efforts by the software industry, BIM is adopted at relatively slow speeds in construction industries across the world. The study presented in this paper examines the challenges to BIM adoption faced specifically in the Chinese construction industry across architecture, engineering and construction. We review recent literature addressing BIM adoption in the international context and develop a critique of common approaches to describe processes of BIM adoption. Substantiated with the analysis of detailed survey data obtained from AEC professionals in the greater Shanghai area, we propose a new, extended model to describe and assess processes of BIM adoption. Utilising this model, we evaluate temporal and collaborative dimensions of BIM adoption, and present results from detailed survey data. We further discuss how current Chinese BIM adoption in practice diverges from overseas BIM adoption strategies and examine how the extended BIM adoption model can provide a more accurate representation of BIM adoption processes observed in practice in and beyond the context of the Chinese AEC industries. Highlights BIM adoption across the Chinese AEC industries is still uneven and over reported. Chinese AEC industries' BIM adoption differs from overseas models. An extended BIM adoption model allows charting BIM adoption along AEC workflows. BIM is adapted for linear Chinese workflows rather than collaborative work.

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