Ferromagnetic resonance in amorphous alloys prepared by rapid quenching from the melt

1976 ◽  
Vol 26 (5) ◽  
pp. 601-602 ◽  
Author(s):  
L. Kraus ◽  
J. Schneider ◽  
H. Wiesner
Keyword(s):  
Ferromagnetic Resonance ◽  
Amorphous Alloys ◽  
Rapid Quenching

Bulk Metallic Glasses

2008 ◽  
Vol 604-605 ◽  
pp. 229-238
Author(s):  
Marcello Baricco ◽  
Tanya A. Başer ◽  
Gianluca Fiore ◽  
Rafael Piccin ◽  
Marta Satta ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metallic Glasses ◽  
Amorphous Alloys ◽  
Shear Bands ◽  
Bulk Metallic Glasses ◽  
Rapid Quenching ◽  
Second Phase ◽  
Research Activity ◽  
Long Time ◽  
Geometrical Constraints

Rapid quenching techniques have been successfully applied since long time for the preparation of metallic glasses in ribbon form. Only in the recent years, the research activity addressed towards the synthesis of bulk metallic glasses (BMG), in form of ingots with a few millimetres in thickness. These materials can be obtained by casting techniques only for selected alloy compositions, characterised by a particularly high glass-forming tendency. Bulk amorphous alloys are characterised by a low modulus of elasticity and high yielding stress. The usual idea is that amorphous alloys undergo work softening and that deformation is concentrated in shear bands, which might be subjected to geometrical constraints, resulting in a substantial increase in hardness and wear resistance. The mechanical properties can be further improved by crystallisation. In fact, shear bands movement can be contrasted by incorporating a second phase in the material, which may be produced directly by controlled crystallisation. Soft magnetic properties have been obtained in Fe-based systems and they are strongly related to small variations in the microstructure, ranging from a fully amorphous phase to nanocrystalline phases with different crystal size. The high thermal stability of bulk metallic glasses makes possible the compression and shaping processes in the temperature range between glass transition and crystallisation. Aim of this paper is to present recent results on glass formation and properties of bulk metallic glasses with various compositions. Examples will be reported on Zr, Fe, Mg and Pd-based materials, focussing on mechanical and magnetic properties.

Boron-rich Ni-B-C amorphous alloys prepared by rapid quenching

1986 ◽  
Vol 5 (11) ◽  
pp. 1178-1180 ◽  
Author(s):  
A. Inoue ◽  
T. Nakamura ◽  
T. Masumoto
Keyword(s):  
Amorphous Alloys ◽  
Rapid Quenching

scholarly journals FERROMAGNETIC RESONANCE STUDY IN FeCrZr AMORPHOUS ALLOYS

1993 ◽  
Vol 42 (6) ◽  
pp. 1006
Author(s):  
HE ZHENG-MING ◽  
LU GUO-RONG ◽  
ZHANG DAO-YUAN ◽  
XU YUN-HUA ◽  
JIN JIAN-HUI
Keyword(s):  
Ferromagnetic Resonance ◽  
Amorphous Alloys

scholarly journals Giant Stress Impedance Magnetoelastic Sensors Employing Soft Magnetic Amorphous Ribbons

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2175 ◽  
Author(s):  
Juan Jesús Beato-López ◽  
Juan Garikoitz Urdániz-Villanueva ◽  
José Ignacio Pérez-Landazábal ◽  
Cristina Gómez-Polo
Keyword(s):  
Amorphous Alloys ◽  
Subsequent Development ◽  
Young Modulus ◽  
Amorphous Structure ◽  
Rapid Quenching ◽  
Soft Magnetic ◽  
Highly Sensitive ◽  
Magnetoelastic Sensors ◽  
Soft Magnetic Amorphous Alloys

Soft magnetic amorphous alloys obtained via rapid quenching techniques are widely employed in different technological fields such as magnetic field detection, bio labeling, non-contact positioning, etc. Among them, magnetoelastic applications stand out due to excellent mechanical properties exhibited by these alloys, resulting from their amorphous structure, namely, their high Young modulus and high tensile strength. In particular, the giant stress impedance (GSI) effect represents a powerful tool to develop highly sensitive magnetoelastic sensors. This effect is based on the changes in the high-frequency electric impedance as the result of the variation in magnetic permeability of the sample under the action of mechanical stresses. In this work, the GSI effect is analyzed in two soft magnetic ribbons ((Co0.93 Fe0.07)75 Si12.5 B12.5 and (Co0.95 Fe0.05)75 Si12.5 B12.5) for the subsequent development of two practical devices: (i) the characterization of the variations in the cross-section dimensions of irregularly shaped elements, and (ii) the design of a flow meter for measuring the rate of flow of water through a pipe.

Deconvolution of ferromagnetic resonance in devitrification process of Co-based amorphous alloys

2006 ◽  
Vol 384 (1-2) ◽  
pp. 297-299 ◽  
Author(s):  
H. Montiel ◽  
G. Alvarez ◽  
I. Betancourt ◽  
R. Zamorano ◽  
R. Valenzuela
Keyword(s):  
Ferromagnetic Resonance ◽  
Amorphous Alloys ◽  
Devitrification Process

Effect of Electron Irradiation on Nanocrystallization of Fe-Nd-B Amorphous Alloys

2006 ◽  
Vol 512 ◽  
pp. 107-110 ◽  
Author(s):  
Akihiro Nino ◽  
Takeshi Nagase ◽  
Yukichi Umakoshi
Keyword(s):  
Grain Size ◽  
Amorphous Phase ◽  
Electron Irradiation ◽  
Amorphous Alloys ◽  
Single Phase ◽  
Nanocrystalline Structure ◽  
Rapid Quenching ◽  
Thermal Crystallization ◽  
Average Grain Size ◽  
Induced Crystallization

Formation of a nanocrystalline structure through rapid solidification, thermal crystallization and electron irradiation induced crystallization was investigated in Fe-Nd-B alloys. A nanocrystalline structure was obtained by rapid quenching of the melt in a Fe86Nd9B5 alloy, while an amorphous single phase was formed in a Fe77Nd4.5B18.5 alloy. In the latter alloy, a nanocrystalline structure was obtained by thermal crystallization and electron irradiation induced crystallization of the amorphous phase. The average grain size of the precipitate obtained by irradiation at 298 K was about 8 nm, which is much smaller than that obtained during thermal crystallization. Results indicate that electron irradiation is effective for obtaining a novel nanocrystalline structure in Fe-Nd-B alloys.

Molecular-Dynamic Computer Simulation Study of Structural and Transport Properties of Some Amorphous Alloys

1991 ◽  
Vol 02 (01) ◽  
pp. 523-526 ◽  
Author(s):  
O.S. TRUSHIN ◽  
P. NAYAK ◽  
V.S. STEPANYUK ◽  
A.A. KATSNELSON ◽  
A. SZASZ
Keyword(s):  
Computer Simulation ◽  
Amorphous Alloys ◽  
Pair Correlation ◽  
Amorphous State ◽  
Rapid Quenching ◽  
Atomic Level ◽  
Dynamic Phase ◽  
Fast Cooling ◽  
Dynamic Computer Simulation ◽  
Molecular Dynamic Computer Simulation

Here we present the molecular-dynamics computer simulation for a few systems of Ni1−xPx (x=0.2,0.25), Fe1−xPx (x=0.24), and Fe1−xBx (x=0.15) to explore the dynamic phase transformation from liquid to amorphous state through rapid quenching and the structure of these alloys at atomic level. The truncated Morse potential has been used to model the interaction between the atoms. The results of computer simulation for the pair correlation function for these systems reveal some interesting features of the corresponding alloy going from the melt to amorphous state through fast cooling. Finally the analysis of Voronoy polyhedron statistic leads us to propose possible models for the structure at atomic level for these alloys in the amorphous state. For the Ni75P25 system it is also revealed that the metastable state depends on the method of preparation of the sample.

Ferromagnetic resonance investigation of magnetism in Fe-rich sputtered amorphous alloys

1997 ◽  
Vol 9 (9) ◽  
pp. 2085-2107
Author(s):  
G Manjusri ◽  
T V S M Mohan Babu ◽  
S N Kaul ◽  
T Lucinski
Keyword(s):  
Ferromagnetic Resonance ◽  
Amorphous Alloys ◽  
Resonance Investigation
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