Kinetic Study of Crystallization Process in Fe[sub 32]Ni[sub 36]Cr[sub 14]P[sub 12]B[sub 6] Metallic Glass

2010 ◽  
Author(s):  
Kirit Lad ◽  
T. L. Shanker Rao ◽  
Arun Pratap ◽  
Arun Pratap ◽  
N. S. Saxena
Keyword(s):  
Metallic Glass ◽  
Kinetic Study ◽  
Crystallization Process

scholarly journals Analysis of the Crystallization Kinetics and Thermal Stability of the Amorphous Mg72Zn24Ca4 Alloy

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3583
Author(s):  
Bartosz Opitek ◽  
Janusz Lelito ◽  
Michał Szucki ◽  
Grzegorz Piwowarski ◽  
Łukasz Gondek ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Crystallization Kinetics ◽  
Crystallization Process ◽  
Isothermal Annealing ◽  
Amorphous Structure ◽  
Avrami Equation ◽  
Temperature Phase ◽  
Scanning Calorimetry ◽  
Human Body Temperature ◽  
End Times

The aim of this study was to analyze the crystallization of the Mg72Zn24Ca4 metallic glass alloy. The crystallization process of metallic glass Mg72Zn24Ca4 was investigated by means of the differential scanning calorimetry. The glass-forming ability and crystallization are both strongly dependent on the heating rate. The crystallization kinetics, during the isothermal annealing, were modelled by the Johnson–Mehl–Avrami equation. Avrami exponents were from 2.7 to 3.51, which indicates diffusion-controlled grain growth. Local exponents of the Johnson–Mehl–Avrami equation were also calculated. In addition, the Mg phase—being the isothermal crystallization product—was found, and the diagram of the time–temperature phase transformation was developed. This diagram enables the reading of the start and end times of the crystallization process, occurring in amorphous ribbons of the Mg72Zn24Ca4 alloy on the isothermal annealing temperature. The research showed high stability of the amorphous structure of Mg72Zn24Ca4 alloy at human body temperature.

Crystallization process for the metallic glass Fe18Co60Si9B13

1995 ◽  
Vol 192-193 ◽  
pp. 509-512 ◽  
Author(s):  
E. Jakubczyk ◽  
Z. Mandecki ◽  
J. Filipecki
Keyword(s):  
Metallic Glass ◽  
Crystallization Process

Structure and Crystallization Process of (Fe 1-x Cr x ) 83 B 17 Metallic Glass

1991 ◽  
Vol 8 (6) ◽  
pp. 296-299 ◽  
Author(s):  
Wei Qin ◽  
Yang Bingchu ◽  
Jiang Ansheng
Keyword(s):  
Metallic Glass ◽  
Crystallization Process

Precipitation of icosahedral quasicrystalline phase in Hf69.5Al7.5Ni11Cu12 metallic glass

2001 ◽  
Vol 16 (4) ◽  
pp. 1190-1194 ◽  
Author(s):  
Chunfei Li ◽  
Akihisa Inoue
Keyword(s):  
Metallic Glass ◽  
Melt Spinning ◽  
Crystallization Process ◽  
Exothermic Reaction ◽  
Quasicrystalline Phase ◽  
Scanning Calorimetry ◽  
Exothermic Reactions ◽  
Transmission Electron ◽  
Icosahedral Quasicrystalline Phase ◽  
Icosahedral Quasicrystalline

A Hf69.5Al7.5Ni11Cu12 metallic glass was prepared by a single roller melt-spinning method, and the crystallization process was studied by x-ray diffraction, differential scanning calorimetry, and transmission electron microscopy. The metallic glass crystallizes through three exothermic reactions. The low-temperature exothermic reaction corresponded to the precipitation of an icosahedral quasicrystalline phase. Further annealing at higher temperature led to the decomposition of the icosahedral quasicrystalline phase to other stable crystalline phases, indicating that the precipitated icosahedral quasicrystalline phase was in a metastable state. The crystallization process of the present alloy was compared with that of other Hf–Al–Ni–Cu alloys, and the reason for the precipitation of the icosahedral quasicrystalline phase was discussed.

scholarly journals Investigating the crystallization process in a FeCrB metallic glass by combining magnetic and neutron thermo-diffraction experiments

2014 ◽  
Vol 549 ◽  
pp. 012018
Author(s):  
Pedro Gorria ◽  
Alejandro Fernández-Martínez ◽  
J D Santos ◽  
María J Pérez ◽  
Gabriel J Cuello
Keyword(s):  
Metallic Glass ◽  
Crystallization Process

Structure of Fe-Based Metallic Glass after Crystallization Process

2010 ◽  
Vol 163 ◽  
pp. 165-168 ◽  
Author(s):  
Ryszard Nowosielski ◽  
Rafał Babilas ◽  
Grzegorz Dercz ◽  
Lucjan Pająk
Keyword(s):  
Magnetic Properties ◽  
Metallic Glass ◽  
Structural Changes ◽  
Crystallization Process ◽  
X Ray Diffraction ◽  
Soft Magnetic ◽  
After Effects ◽  
Transmission Electron ◽  
Saturation Induction

The work presents a crystallization process of Fe-based amorphous alloy by characterization of the influence of annealing temperature on structural changes and magnetic properties of Fe72B20Si4Nb4 metallic glass. The studies were performed on the samples in the form of ribbons and rods. Crystallization behaviour of the studied alloy was examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM) methods. The studies of soft magnetic properties of tested material involved magnetic permeability, saturation induction, coercive field and magnetic after-effects measurements.

Free volume change in crystallization process of Zr–Cu–Al metallic glass studied by positron annihilation techniques

2007 ◽  
Vol 434-435 ◽  
pp. 207-210 ◽  
Author(s):  
Fuminobu Hori ◽  
Takaaki Yano ◽  
Yoshihiko Yokoyama ◽  
Yasutake Akeno ◽  
Toyohiko J. Konno
Keyword(s):  
Metallic Glass ◽  
Positron Annihilation ◽  
Free Volume ◽  
Volume Change ◽  
Crystallization Process
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