In situ crystallization of metallic glasses during magnetic field annealing

2015 ◽  
Vol 91 ◽  
pp. 50-56 ◽  
Author(s):  
M. Miglierini ◽  
V. Procházka ◽  
R. Rüffer ◽  
R. Zbořil
Keyword(s):  
Magnetic Field ◽  
Metallic Glasses ◽  
Field Annealing ◽  
In Situ Crystallization

In situ crystallization of Zirconium-based bulk metallic glasses

2000 ◽  
Vol 276-278 ◽  
pp. 905-906 ◽  
Author(s):  
J.L Soubeyroux ◽  
J.M Pelletier ◽  
R Perrier de la Bâthie
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
In Situ Crystallization

scholarly journals On the Formation of Nanocrystalline Grains in Metallic Glasses by Means of In-Situ Nuclear Forward Scattering of Synchrotron Radiation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 544 ◽  
Author(s):  
David Smrčka ◽  
Vít Procházka ◽  
Vlastimil Vrba ◽  
Marcel Miglierini
Keyword(s):  
Magnetic Field ◽  
Synchrotron Radiation ◽  
External Magnetic Field ◽  
Metallic Glasses ◽  
Hyperfine Interactions ◽  
Transformation Process ◽  
Forward Scattering ◽  
Point Of View ◽  
Nuclear Forward Scattering

Application of the so-called nuclear forward scattering (NFS) of synchrotron radiation is presented for the study of crystallization of metallic glasses. In this process, nanocrystalline alloys are formed. Using NFS, the transformation process can be directly observed during in-situ temperature experiments not only from the structural point of view, i.e., formation of nanocrystalline grains, but one can also observe evolution of the corresponding hyperfine interactions. In doing so, we have revealed the influence of external magnetic field on the crystallization process. The applied magnetic field is not only responsible for an increase of hyperfine magnetic fields within the newly formed nanograins but also the corresponding components in the NFS time spectra are better identified via occurrence of quantum beats with higher frequencies. In order to distinguish between these two effects, simulated and experimental NFS time spectra obtained during in-situ temperature measurements with and without external magnetic field are compared.

An experimental investigation on the notch toughness of Cu-Zr-based bulk metallic glasses with in-situ crystallization

2017 ◽  
Vol 469 ◽  
pp. 70-78 ◽  
Author(s):  
Laura M. Andersen ◽  
Sabine Faulhaber ◽  
Tyler Harrington ◽  
Douglas C. Hofmann ◽  
Huikai Cheng ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Notch Toughness ◽  
In Situ Crystallization

In Situ Crystallization Measurements on Fe-Zr Glasses Using an Automated High-Temperature Diffractometer with a Position Sensitive Detector

1986 ◽  
Vol 30 ◽  
pp. 483-491 ◽  
Author(s):  
G. Zorn ◽  
E. Hellstern ◽  
H. Göbel ◽  
L. Schultz
Keyword(s):  
Metallic Glasses ◽  
Elevated Temperatures ◽  
Composition Range ◽  
Amorphous State ◽  
Glass Forming ◽  
Metal Metal ◽  
In Situ Crystallization ◽  
Position Sensitive ◽  
Fast Quenching

Metallic glasses are mostly produced by fast quenching from a melt. The glass forming composition range in binary materials is thereby restricted to the area around eutectics. The production of metal-metal binary glasses in a much wider composition range is possible by employing a technique called 'mechanical alloying'. Using this technique the metallic class is produced as a powder which can be manufactured into any shape to make use of the properties the material exhibits in the amorphous state. During compacting, and also in some applications of the finished product, the glass has to endure elevated temperatures which might cause devitrification. Since this crystallization of a metallic glass usually results in the loss of properties essential for a certain application it is necessary to investigate this crystallization behaviour and thus receive information about a material's prospective performance in a particular application.

Aligned gadolinium barium copper oxide thick films formed by in situ crystallization in a magnetic field

1993 ◽  
Vol 8 (10) ◽  
pp. 2440-2444 ◽  
Author(s):  
Joanna McKittrick ◽  
Ramiro Contreras ◽  
Dennis Clougherty
Keyword(s):  
Magnetic Field ◽  
Copper Oxide ◽  
Applied Magnetic Field ◽  
Barium Copper Oxide ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Barium Copper ◽  
Axis Alignment ◽  
In Situ Crystallization

Gd-1:2:3 films were synthesized from acetate precursors and spun-on to polycrystalline substrates of yttria-stabilized zirconia. The substrates were fired in air at 500 °C in between each applied coat. After applying 10–30 coats, they were crystallized by heating to 900 °C in Ar or O2 with or without the application of a 1 T magnetic field. The applied magnetic field was found to produce c-axis alignment for films <4 μm. Annealing in argon produced alignment, but the effect was less pronounced than annealing in oxygen. Substrates with films > 20 μm were not aligned for either environment.

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

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