Structure Evolution of Fe- and Co-Based Amorphous Alloys Studied by the Electrical Resistivity Measurements

The subject of this study is the change of the electrical resistivity of Fe-based metallic glasses during heat treatment. Electrical resistivity is a structure-sensitive characteristic of materials. In metallic glasses, the scattering of conduction electrons on the disordered structure is the main mechanism responsible for the electrical resistivity. Hence amorphous metallic alloys have a much higher residual resistivity as compared to their crystalline analogs. It is typical for metallic glasses that the temperature coefficient of resistivity (TRC) is smaller than for the corresponding crystalline materials, and it can be either positive or negative.

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Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

Metals ◽

10.3390/met10030358 ◽

2020 ◽

Vol 10 (3) ◽

pp. 358 ◽

Cited By ~ 1

Author(s):

Alexandr Aronin ◽

Galina Abrosimova

Keyword(s):

Amorphous Phase ◽

Metallic Glasses ◽

Amorphous Alloys ◽

Structural Changes ◽

Shear Bands ◽

Component Composition ◽

Amorphous Structure ◽

Structure Evolution ◽

Current State ◽

Heterogeneous Phase

This work is devoted to a brief overview of the structure and properties of amorphous-nanocrystalline metallic alloys. It presents the current state of studies of the structure evolution of amorphous alloys and the formation of nanoglasses and nanocrystals in metallic glasses. Structural changes occurring during heating and deformation are considered. The transformation of a homogeneous amorphous phase into a heterogeneous phase, the dependence of the scale of inhomogeneities on the component composition, and the conditions of external influences are considered. The crystallization processes of the amorphous phase, such as the homogeneous and heterogeneous nucleation of crystals, are considered. Particular attention is paid to a volume mismatch compensation on the crystallization processes. The effect of changes in the amorphous structure on the forming crystalline structure is shown. The mechanical properties in the structure in and around shear bands are discussed. The possibility of controlling the structure of fully or partially crystallized samples is analyzed for creating new materials with the required physical properties.

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Electron Transport Properties of Aluminium Substituted CuTi Amorphous Alloys

International Journal of Modern Physics B ◽

10.1142/s0217979297000332 ◽

1997 ◽

Vol 11 (03) ◽

pp. 303-313 ◽

Cited By ~ 1

Author(s):

A. K. Bhatnagar ◽

G. Fritsch ◽

D. G. Naugle ◽

R. Haberkern ◽

M. Kandlbinder ◽

...

Keyword(s):

Electrical Resistivity ◽

Electron Transport ◽

Low Temperature ◽

Amorphous Alloys ◽

Room Temperature ◽

Quantum Corrections ◽

Spin Orbit ◽

Electron Transport Properties ◽

Temperature Coefficient Of Resistivity ◽

Scattering Time

Room temperature electrical resistivity (ρ), temperature coefficient of resistivity (α) and Hall coefficient (R H ) of ( Cu 1-y Ti y)1-x Al x amorphous alloys, where y=0.36, 0.50 and 0.64 and x=0, 0.05 and 0.10 are presented. The low temperature dependence of resistivity and magnetoresistivity of a-( Cu 0.36 Ti 0.64)1-x Al x are also presented and discussed qualitatively in terms of quantum corrections. It is found that the addition of Al in a- Cu 0.36 Ti 0.64 alloy decreases the spin-orbit scattering time τ so .

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MECHANICAL PROPERTIES OF BULK METALLIC GLASSES AT CRYOGENIC TEMPERATURES

Modern Physics Letters B ◽

10.1142/s0217984909020928 ◽

2009 ◽

Vol 23 (23) ◽

pp. 2703-2722 ◽

Cited By ~ 5

Author(s):

CANG FAN ◽

C. T. LIU ◽

H. G. YAN

Keyword(s):

Metallic Glasses ◽

Amorphous Alloys ◽

Cryogenic Temperature ◽

Atomic Clusters ◽

Cryogenic Temperatures ◽

Mechanical Behaviors ◽

Paper Briefly ◽

Crystalline Materials ◽

Strength And Ductility ◽

Rigid Skeleton

Metallic glasses (amorphous alloys) consist of atomic clusters, interconnecting zones and free volume. The atomic clusters are connected together, resulting in the formation of a rigid skeleton through the interconnecting zones. Some metallic glasses even contain crystalline structures at the nanoscale. Even though there is supposed to be no structural change at temperatures below the glass transition temperature, metallic glasses exhibit different mechanical behaviors at cryogenic temperatures. Contrary to crystalline materials, the strength and ductility of some metallic glasses and their composites both show a significant increase with decreasing temperature in the cryogenic temperature range. This paper briefly reviews these phenomena.

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TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v5i3.1887 ◽

2014 ◽

Vol 5 (3) ◽

pp. 982-992 ◽

Cited By ~ 1

Author(s):

M AL-Jalali

Keyword(s):

Experimental Data ◽

Electrical Resistivity ◽

Temperature Dependence ◽

Concentration Dependence ◽

Low Temperatures ◽

Noble Metals ◽

Phonon Scattering ◽

Theoretical Models ◽

Residual Resistivity ◽

Electron Phonon Scattering

Resistivity temperature â€“ dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron â€“ dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

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Effect of type and volume fraction of crystallization products on the variations of electrical resistivity in Cu47Ti34Zr11Ni8 and Ti40Zr25Cu12Ni3Be20 metallic glasses

Intermetallics ◽

10.1016/j.intermet.2021.107283 ◽

2021 ◽

Vol 137 ◽

pp. 107283

Author(s):

Binbin Liu ◽

Caiyun Liu ◽

Xin Jiang ◽

Shuying Zhen ◽

Li You ◽

...

Keyword(s):

Electrical Resistivity ◽

Metallic Glasses ◽

Volume Fraction

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The electrical resistivity of lithium-6

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1961.0170 ◽

1961 ◽

Vol 263 (1314) ◽

pp. 407-419 ◽

Cited By ~ 18

Keyword(s):

Electrical Resistivity ◽

Isotopic Composition ◽

Specific Heat ◽

Room Temperature ◽

Natural Isotopic Composition ◽

Square Roots ◽

Conduction Electrons ◽

Ionic Mass ◽

Theoretical Predictions ◽

Electrical Resistivities

The electrical resistivities of lithium -6 and lithium of natural isotopic composition have been studied between 4°K and room temperature. In addition, their absolute resistivities have been carefully compared at room temperature. These measurements show that the effect of ionic mass on electrical resistivity agrees with simple theoretical predictions, namely, that the properties of the conduction electrons in lithium do not depend on the mass of the ions, and that the characteristic lattice frequencies for the two pure isotopes are in the inverse ratio of the square roots of their ionic masses. A comparison with the specific heat results of Martin (1959, 1960), where the simple theory is found not to hold, indicates the possibility that anharmonic effects are present which affect the specific heat but not the electrical resistivity.

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