scholarly journals Effects of High Magnetic Field Postannealing on Microstructure and Properties of Pulse Electrodeposited Co-Ni-P Films

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Donggang Li ◽  
Chun Wu ◽  
Qiang Wang ◽  
Jean-Paul Chopart ◽  
Jicheng He ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Structure And Properties ◽  
Microstructure And Properties ◽  
Field Annealing ◽  
Fcc Phase ◽  
Moderate Magnetic Field ◽  
The Right ◽  
Deposited Film ◽  
The Magnetic Field

The influence of high magnetic field annealing on the morphology, microstructure, and properties of pulsed-electrodeposited Co-Ni-P films was investigated. The as-deposited film with a rough surface changed into uniform nanocrystalline during the magnetic field annealing process. In particular, the formation of intestine-like appearance with spherical clusters vanishing is favored from a moderate magnetic field strength of 6 T, due to the polarized effects. Meantime, the diffraction peak (111) of α (fcc) phase shifts to the right direction, which is attributed to the fact that more Co atoms from phosphide phase are incorporated into the Ni lattice, in comparison with the case of annealing under 0 T and 12 T magnetic fields. The mechanical and magnetic properties of the films reach relative optimum values at B=6 T. The evolution of magneto-induced modification in the Co-Ni-P morphology, structure, and properties can be explained by the polarized effect and the diffusion-acceleration effect under a high magnetic field.

Effects of High Magnetic Field Annealing on the Nucleation Sites for Recrystallized Nuclei with {111} Orientation in Cold-Rolled IF Steel Sheet

2010 ◽  
Vol 638-642 ◽  
pp. 824-828
Author(s):  
Yan Wu ◽  
Chang Shu He ◽  
Yu Dong Zhang ◽  
Xiang Zhao ◽  
Liang Zuo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Steel Sheet ◽  
Annealed Specimen ◽  
If Steel ◽  
Nucleation Sites ◽  
Field Annealing ◽  
Cold Rolled ◽  
The Magnetic Field ◽  
If Steel Sheet

The effect of high magnetic field annealing on the nucleation sites for recrystallized nuclei with {111}<112> orientation in the initial stage of recrystallization in as-annealed interstitial-free (IF) steel sheet were investigated by the SEM-EBSD analysis. Specimens of cold rolled IF steel sheet were annealed at 650°C for 0min and 10min respectively with a 12-tesla magnetic field to obtain a partially recrystallized microstructure. During the magnetic field annealing, they were respectively placed at the center of the applied field with their rolling planes parallel to the magnetic field direction (MD), and with their rolling direction (RD) parallel and normal to the MD, respectively. It was found that different to the non-field annealed specimen, in the field annealed specimens, the {111}<112> oriented recrystallized nulei favored to nucleate in the {111}<112> deformed matrix and not in the {111}<110> deformed matrix. This phenomenon may be attributed to the magnetic ordered state induced by the magnetic field, which might suppress the formation of high-energy grain boundaries between the newly formed nuclei and the deformed matrix.

Effects of high magnetic field annealing on the initial recrystallized texture in pure copper

2015 ◽  
Vol 29 (10n11) ◽  
pp. 1540020 ◽  
Author(s):  
Tong He ◽  
Yan Wang ◽  
Wei Sun ◽  
Xiang Zhao
Keyword(s):  
Magnetic Field ◽  
Grain Boundaries ◽  
High Magnetic Field ◽  
Pure Copper ◽  
Cube Texture ◽  
Magnetic Annealing ◽  
Final Annealing ◽  
Field Annealing ◽  
Cold Rolled ◽  
The Magnetic Field

The cold-rolled pure copper sheets were annealed with and without a high magnetic field of 12 T. The results showed that the magnetic annealing could promote the formation of the initial recrystallized cube texture. The magnetic annealing did not dramatically change the final annealing textures, but the intensity of the recrystallized cube texture is obviously different. The differences of the recrystallized cube orientation intensity between the specimens with and without the field annealing may be attributed to the effects of the magnetic field on the mobility of grain boundaries.

Observations on the Effect of a High Magnetic Field Annealing on the Recrystallized Microstructure and Texture Evolution in Pure Copper

2011 ◽  
Vol 702-703 ◽  
pp. 411-414 ◽  
Author(s):  
He Tong ◽  
Tian You Kang ◽  
Zhi Jia Wang ◽  
Xiang Zhao ◽  
Liang Zuo
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Annealing Temperature ◽  
Texture Evolution ◽  
Pure Copper ◽  
Field Annealing ◽  
Cold Rolled ◽  
The Magnetic Field

The cold-rolled pure copper sheets were annealed without and with a high magnetic field of 12T. The results showed that the application of the magnetic field could promote the recovery and recrystallization processes of cold rolled pure copper. The intensity of Cube component in the field treated samples was obviously higher than that in the non-field treated ones at the same annealing temperature.

scholarly journals Reversibility of the Magnetocaloric Effect in the Bean-Rodbell Model

2021 ◽  
Vol 7 (5) ◽  
pp. 60
Author(s):  
Luis M. Moreno-Ramírez ◽  
Victorino Franco
Keyword(s):  
Magnetic Field ◽  
Thermal Hysteresis ◽  
Entropy Change ◽  
Second Order ◽  
Zero Field ◽  
First Order ◽  
Magnetic Field Change ◽  
Magnetocaloric Materials ◽  
Moderate Magnetic Field ◽  
The Magnetic Field

The applicability of magnetocaloric materials is limited by irreversibility. In this work, we evaluate the reversible magnetocaloric response associated with magnetoelastic transitions in the framework of the Bean-Rodbell model. This model allows the description of both second- and first-order magnetoelastic transitions by the modification of the η parameter (η<1 for second-order and η>1 for first-order ones). The response is quantified via the Temperature-averaged Entropy Change (TEC), which has been shown to be an easy and effective figure of merit for magnetocaloric materials. A strong magnetic field dependence of TEC is found for first-order transitions, having a significant increase when the magnetic field is large enough to overcome the thermal hysteresis of the material observed at zero field. This field value, as well as the magnetic field evolution of the transition temperature, strongly depend on the atomic magnetic moment of the material. For a moderate magnetic field change of 2 T, first-order transitions with η≈1.3−1.8 have better TEC than those corresponding to stronger first-order transitions and even second-order ones.

scholarly journals EFFECT OF MECHANOCHEMICAL TREATMENT OF INGREDIENTS ON STRUCTURE AND PROPERTIES OF RUBBER MIXTURES AND RUBBERS ON BASIS ОF 1,4-CIS-POLYISOPRENE

2020 ◽  
Vol 63 (5) ◽  
pp. 89-93
Author(s):  
Vladimir M. Makarov ◽  
Elena L. Nikitina ◽  
Olga Yu. Solovyeva
Keyword(s):  
Magnetic Field ◽  
Zinc Oxide ◽  
Carbon Black ◽  
Mechanochemical Activation ◽  
Mechanochemical Treatment ◽  
Structure And Properties ◽  
Electrical Grid ◽  
Magnetic Elements ◽  
The Magnetic Field

The effect of the mechanochemical treatment of components of the sulphurous vulcanizing group on the properties of rubber mixtures and rubbers on the basis of 1,4-cis-polyisopren, filled with carbon black N330, was investigated. The mechanochemical activation of the components was carried out by processing them in a device that is a reactor with magnetic elements and a coil of inductivity. When connecting the inductor to the electrical grid, the working elements are exposed to the magnetic field and began to move intensiocly way with the transfer of energy to powdered particles. The treatment of both individual components: zinc oxide, accelerators, and all components of the sulfur vulcanizing group leads to an increase in the rate and degree of structuring of rubber in the main vulcanization period and a decrease in the tendency of rubber to reverse in the postvulcanization stage. In this case the values of elasticity modules increase and mechanical losses in vulcanizates reduce as the temperature increases. Most of these changes in the properties of mixtures and rubbers are expressed in the processing of individual accelerators and together all components of the vulcanizing group. Storage of activated ingredients for 30 days does not lead to significant changes in the structure and properties of rubber mixtures and vulcanizates.

Influence of a high magnetic field on the microstructure and properties of a Cu–Fe–Ag in situ composite

2013 ◽  
Vol 584 ◽  
pp. 114-120 ◽  
Author(s):  
K.M. Liu ◽  
D.P. Lu ◽  
H.T. Zhou ◽  
Z.B. Chen ◽  
A. Atrens ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
In Situ Composite ◽  
Microstructure And Properties

scholarly journals High-Magnetic-Field Annealing and Coercivity in Sintered Nd-Dy-Fe-B-Type Magnets

2006 ◽  
Vol 30 (4) ◽  
pp. 447-454 ◽  
Author(s):  
T. Akiya ◽  
H. Kato ◽  
M. Sagawa ◽  
K. Koyama ◽  
T. Miyazaki
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Field Annealing

High-magnetic field annealing effect on room-temperature ferromagnetism enhancement of un-doped HfO2 thin films

2015 ◽  
Vol 119 (3) ◽  
pp. 917-921
Author(s):  
Qian Xie ◽  
Weipeng Wang ◽  
Zheng Xie ◽  
Shuai Ning ◽  
Zhengcao Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
High Magnetic Field ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Annealing Effect ◽  
Field Annealing

scholarly journals Alfvén Waves in Dusty Interstellar Clouds

1997 ◽  
Vol 14 (2) ◽  
pp. 170-178 ◽  
Author(s):  
N. F. Cramer ◽  
S. V. Vladimirov
Keyword(s):  
Magnetic Field ◽  
Negative Charge ◽  
Alfven Waves ◽  
Dust Particles ◽  
Alfvén Waves ◽  
Interstellar Clouds ◽  
General Dispersion ◽  
The Right ◽  
The Magnetic Field ◽  
Field Wave

AbstractDust particles in a plasma can be higWy charged, and can carry a proportion of the negative charge of the plasma. Even if this proportion is quite small, as in interstellar dusty clouds, it can have a large effect on hydromagnetic Alfvén waves propagating at frequencies well below the ion–cyclotron frequency. In particular, the right-hand circularly polarised mode experiences a cutoff due to the presence of the dust. We generalise previous work on Alfvén waves in dusty interstellar plasmas by considering the general dispersion relation for waves propagating at an arbitrary angle with respect to the magnetic field. Wave energy propagating at oblique angles to the magnetic field in an increasing density gradient can be very efficiently damped by the Alfvén resonance absorption process in a dusty plasma, and we consider this damping mechanism for waves in interstellar clouds.

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