scholarly journals The Influence of Heat Treatment Regime on the Microstructure and Magnetic Properties of Melt-spun Nd—Fe—B with Nd Low Content

ChemInform ◽  
2007 ◽  
Vol 38 (12) ◽  
Author(s):  
N. Talijan ◽  
J. Stajic-Trosic ◽  
A. Grujic ◽  
V. Cosovic ◽  
D. Nedeljkovic ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Treatment Regime ◽  
Heat Treatment Regime ◽  
Melt Spun ◽  
Microstructure And Magnetic Properties

Effect of Wheel Speeds on the Microstructure and Magnetic Properties of Melt-Spun (Nd0.75,Dy0.25)10.5 Zr2Fe82B5.5 Ribbons

2012 ◽  
Vol 569 ◽  
pp. 23-26 ◽  
Author(s):  
Jie Qiu ◽  
Shan Dong Li ◽  
Mei Mei Liu ◽  
Jian Peng Wu ◽  
Yi Hu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Exchange Coupling ◽  
Wheel Speed ◽  
Coupling Interaction ◽  
Nanocomposite Structure ◽  
Melt Spun ◽  
Exchange Coupling Interaction ◽  
Strong Exchange ◽  
Microstructure And Magnetic Properties

Nanocomposite (Nd,Dy)2Fe14B/α-Fe magnets were prepared by directly solidification (DS). The effect of wheel speed on the magnetic properties, microstructure and exchange coupling interaction has been studied. It was found that a uniform R2Fe14B/α-Fe nanocomposite structure with fine α-Fe grains can be developed at an optimum wheel speed of about 18 m/s. Without any heat treatment, the optimal ribbons (v = 18 m/s) show a strong exchange coupling interaction and good magnetic properties, e.g. iHc=1027 kA/m, mr =0.71, (BH)max=174 kJ/m3.

Microstructure and magnetic properties in as-cast and melt spun Co–Zr alloys

2015 ◽  
Vol 644 ◽  
pp. 7-12 ◽  
Author(s):  
Mithun Palit ◽  
J. Arout Chelvane ◽  
Himalay Basumatary ◽  
D. Aravindha Babu ◽  
S.V. Kamat
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Microstructure And Magnetic Properties ◽  
Zr Alloys

Magnetic Properties, Nanostructure, and Ordering Kinetics of Nb Additive FePtCu Films

2010 ◽  
Vol 638-642 ◽  
pp. 1743-1748
Author(s):  
G.J. Chen ◽  
Y.H. Shih ◽  
Jason S.C. Jang ◽  
S.R. Jian ◽  
P.H. Tsai ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Activation Energy ◽  
Magnetic Properties ◽  
Heating Rates ◽  
Fept Alloy ◽  
Ordering Kinetics ◽  
Nb Content ◽  
Kinetics Of ◽  
Nb Addition ◽  
Microstructure And Magnetic Properties

In this study,the (FePt)94-xCu6Nbx (x=0, 2.87, 4.52, 5.67) alloy films were prepared by co-sputtering. The effects of Nb addition content and heat treatment on the microstructure and magnetic properties of the polycrystalline FePtCu films are reported. Our previous experiments showed that the ordering temperature of the (FePt)94Cu6 films reduced to 320 °C, which is much lower than that of the FePt alloy. However, the grain growth after heat treatment limited the practical application in recording media. By adding the Nb content in the (FePt)94Cu6 film, the grain sizes of the films can be adjusted from 50 to 18nm, even for the films annealed at temperature as high as 600°C. DSC traces of as-deposited disorder films at different heating rates, to evaluate the crystallization of the order phase, revealed that the addition of Nb enhanced the activation energy of ordering from 87 kJ/mol to 288 kJ/mol for the (FePt)94-xCu6Nbx (x=0 and 2.87, respectively) films. The reduction of the grain size and the corresponding increase in the activation energy of the Fe-Pt-Cu-Nb films might result from the precipitation of the Nb atoms around the ordering FePt phase. The (FePt)94-xCu6Nbx (x=2.87) film showed a coercive force of 13.4 kOe and the magnetization of 687 emu/cc.

scholarly journals Influence of Heat Treatment on the Microstructure and Magnetic Properties of Mn–Sn–Co–N Alloys

2013 ◽  
Vol 54 (10) ◽  
pp. 2007-2010 ◽  
Author(s):  
Keita Shinaji ◽  
Tsuyoshi Mase ◽  
Keita Isogai ◽  
Masashi Matsuura ◽  
Nobuki Tezuka ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Microstructure And Magnetic Properties

Microstructure and magnetic properties of twin roller melt spun NdFeB alloys

Materialia ◽  
2018 ◽  
Vol 2 ◽  
pp. 122-130
Author(s):  
Jorge M. Levingston ◽  
Gabriela Pozo-López ◽  
Adriana M. Condo ◽  
Silvia E. Urreta ◽  
Luis M. Fabietti
Keyword(s):  
Magnetic Properties ◽  
Melt Spun ◽  
Microstructure And Magnetic Properties

EFFECT OF NANOCRYSTALLIZATION ANNEALING ON MAGNETIC PROPERTIES AND MAGNETOIMPEDANCE OF CO-BASE RIBBONS

2012 ◽  
Vol 05 ◽  
pp. 841-846
Author(s):  
AMIR KEYVANARA ◽  
REZA GHOLAMIPOUR ◽  
SHAMSEDIN MIRDAMADI ◽  
FARZAD SHAHRI ◽  
HOSSEIN SEPEHRI AMIN
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Magnetic Properties ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Nanocrystalline Phases

Melt spun ribbons of Co 64 Fe 4 Ni 2 B 19 Si 8 Cr 3 alloy have been prepared and the nanocrystallization process was carried out by the heat treatment of the as spun ribbons above the crystallization temperature. Structural studies of the samples have been performed by transmission electron microscopy and X-ray diffraction. Magnetic properties of the samples and magnetoimpedance measurements were investigated and it was revealed that magnetic properties and magnetoimpedance of the samples deteriorate by the formation of nanocrystalline phases.

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