Effect of Pulsed Magnetic Field Treatment on the Magnetic Properties of the Fe-Nd-Al-B Alloys Prepared by Suction Casting

2011 ◽  
Vol 688 ◽  
pp. 383-388 ◽  
Author(s):  
Qin Bai ◽  
H. Man ◽  
Y.J. Tang ◽  
H. Xu ◽  
S. Xia
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Curie Point ◽  
Amorphous Alloys ◽  
Exchange Coupling ◽  
Pulsed Magnetic Field ◽  
Magnetic Phases ◽  
Bulk Amorphous Alloys ◽  
Magnetic Field Treatment

The magnetic properties of the (Fe0.53Nd0.37Al0.10)96B4bulk amorphous alloys annealed in the temperature range of 293-623K for 30 min with and without an external pulsed magnetic field of 5T were studied. The results reveal that the remanence and coercivity of the samples are obviously improved with a pulsed magnetic field when annealed below the Curie temperature of the alloy. The increment of remanence reaches 25.9% for the sample annealed at 523K with a pulsed magnetic field, because of the enhancement of exchange coupling roles between the soft and hard magnetic phases. It provides a new way to improve the magnetic properties of the bulk amorphous alloys produced by pulsed magnetic annealing at temperatures below the Curie point of the alloys.

Effect of pulsed magnetic field treatment on the magnetic properties for nanocomposite Nd2Fe14B/α-Fe alloys

2008 ◽  
Vol 459 (1-2) ◽  
pp. 41-44 ◽  
Author(s):  
Shiyan Zhang ◽  
Hui Xu ◽  
Xiaohua Tan ◽  
Jiansen Ni ◽  
Xueling Hou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Pulsed Magnetic Field ◽  
Magnetic Field Treatment ◽  
Fe Alloys

scholarly journals Effect of Heat Treatment on Magnetic Properties of Bulk Amorphous Alloys Fe63+xCo10Y7-xB20 (x=0, 2)

2019 ◽  
Vol 70 (2) ◽  
pp. 724-729
Author(s):  
Jerzy Wyslocki ◽  
Mateusz Talar
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Thermal Treatment ◽  
Curie Temperature ◽  
Amorphous Alloys ◽  
Magnetization Vector ◽  
Amorphous Structure ◽  
Bulk Amorphous Alloys ◽  
Research Material ◽  
Xrd Studies

This paper presents the results of tests on amorphous alloys Fe65Co10Y5B20, Fe63Co10Y7B20 in the state after solidification and after thermal treatment. The thermal treatment was performed below the crystallization temperature and above the Curie temperature (750K/25 min). The samples for the investigation had the shape of rods with a diameter of 1 mm and a length of 20 mm. The structure and magnetic properties were studied for the research material. The structure was investigated using XRD and the magnetic properties using VSM and FERROTESTER. XRD studies showed that the samples both in solidified state and after thermal treatment had an amorphous structure. The losses for the re-magnetization of the tested samples were comparable to those for commercially used FeSi materials. The process of magnetization in the vicinity of the area called the approach to ferromagnetic saturation is associated with all tested samples with rotation of the magnetization vector near free volumes. An interesting result of the conducted research is that not always a thermal treatment made on general principles leads to improvement of magnetic.

Martensitic Transformation and Mechanical Properties of Fe-Doped Ni54Mn21Ga25 Alloys

2011 ◽  
Vol 687 ◽  
pp. 500-504
Author(s):  
S. X. Xue ◽  
S.S. Feng ◽  
P. Y. Cai ◽  
Q T Li ◽  
H. B. Wang
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Magnetic Properties ◽  
Martensitic Transformation ◽  
Curie Temperature ◽  
Directional Solidification ◽  
Transformation Temperature ◽  
Room Temperature ◽  
Martensitic Transformation Temperature ◽  
Polycrystalline Alloys

Ni54Mn21-xFexGa25（x=0,1,3,5,7,9）polycrystalline alloys were prepared by the technique of directional solidification and the effect of substituting Fe for Mn on the martensitic transformation and mechanical properties of the alloys was analyzed. It was found that the Curie temperature increased with increasing substitution while the martensitic transformation temperature decreased. The Fe-doped Ni54Mn21Ga25 alloys exhibit excellent magnetic properties at room temperature; the typical Ni54Mn20Fe1Ga25 alloy shows a large magnetic-induced-strain of -1040 ppm at a magnetic field of 4000 Oe.

Effects of Pulsed Magnetic Field on the Microstructure and Mechanical Properties of Mg97Y2Zn1 Alloy

2014 ◽  
Vol 1004-1005 ◽  
pp. 123-126 ◽  
Author(s):  
Jian Yin ◽  
Xiu Jun Ma ◽  
Jun Ping Yao ◽  
Zhi Jian Zhou
Keyword(s):  
Magnetic Field ◽  
Mechanical Properties ◽  
Grain Size ◽  
Volume Fraction ◽  
Pulsed Magnetic Field ◽  
Second Phase ◽  
Microstructure And Mechanical Properties ◽  
Magnetic Field Treatment ◽  
Semi Solid ◽  
Strength And Plasticity

Effect of pulsed magnetic field treatment on the microstructure and mechanical properties of Mg97Y2Zn1 alloy has been investigated. When the pulsed magnetic field is applied on the alloy in semi-solid state, the α-Mg was modified from developed dendrite to fine rosette, resulting in a refined solidification microstructure with the grain size decreased from 4 mm to 0.5 mm. The volume fraction of the second phase ( X phase) increased by about 10 %. The yield strength, fracture strength and plasticity were improved by 21 MPa, 38 MPa and 2.4 %, respectively. The improvement of mechanical properties was attributed to the refined grain size and increased volume fraction of X phase.

Unusual Magnetic Properties of Fe/Ni Bilayers on Cu(100)

2000 ◽  
Vol 648 ◽  
Author(s):  
B. Schirmer ◽  
X. Liu ◽  
M. Wuttig
Keyword(s):  
Magnetic Properties ◽  
Surface Layer ◽  
Molecular Beam Epitaxy ◽  
Exchange Coupling ◽  
Molecular Beam ◽  
Interface Layer ◽  
Temperature Dependent ◽  
Iron Films ◽  
Magnetic Phases ◽  
Rich Variety

AbstractUltrathin iron films grown on Cu(100) have been found to exhibit a rich variety of structural and magnetic phases. In the present work, Fe/Ni bilayers have been prepared by molecular beam epitaxy to explore novel magnetic phenomena introduced by the ferromagnetic (FM) Ni underlayer. Unusual properties have been observed by measuring the temperature dependent magnetic properties. For 5.3 ML Fe on 7 ML Ni, a temperature dependent exchange coupling in the Fe film has been observed between the FM surface layer and FM interface layer.

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