Temperature and composition dependence of Mg-based amorphous-alloy structure factors

AbstractThe structure of a υ component liquid or amorphous alloy is analyzed in terms of υ(υ+1)/2 independent partial structure factors which are associated to the different correlations between the numbers of particles of all chemical species. This formalism, which is specially adapted to the study of alloys of more than two components, is related to Fournet-Faber-Ziman and extended Bhatia-Thornton theory. Sum rules, inequality relations and limiting values are calculated in the static approximation and Debye pair expressions of the structure factors are derived in the isotropic approximation.

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Evolution of nickel iron-based amorphous alloy structure under friction

Journal of Friction and Wear ◽

10.3103/s1068366608040053 ◽

2008 ◽

Vol 29 (4) ◽

pp. 271-276

Author(s):

P. A. Vityaz’ ◽

G. G. Goranskii ◽

V. I. Zhornik ◽

V. A. Kukareko ◽

A. G. Kononov

Keyword(s):

Amorphous Alloy ◽

Alloy Structure ◽

Nickel Iron ◽

Iron Based

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Preparation and Characterization of Expandable Graphite Decorated with Rare Earth Nanoparticles CeO2

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.634-638.2125 ◽

2013 ◽

Vol 634-638 ◽

pp. 2125-2128

Author(s):

Chun Yu Wang ◽

Yi Long Huang ◽

Yi Feng ◽

Chun Li Qin ◽

Peng Zhang

Keyword(s):

Rare Earth ◽

Amorphous Alloy ◽

Expandable Graphite ◽

Alloy Structure ◽

Mixture Ratio ◽

Graphite Nanosheets ◽

Graphite Sheets ◽

The Rare Earth ◽

Rare Earth Nanoparticles

In this paper, it can be seen that the optimum mixture ratio of graphite to other contents (graphite: HNO3: H2O2: KMnO4 ) is 1.0(g):6(ml): (2.0ml):(0.2g), which obtained the best expansion volume. The graphite sheets within EG were nanoscales, rare earth nanoparticles were dispersed between holes of expandable graphite sheets. Evidently, the graphite nanosheets wrapped in the rare earth particles can be observed. It is clearly that the rare earth particles within EG were nanoscales. In addition, rare earth particles on expandable graphite were nanoscales, and the EG/CeO2 composite obtained by this process is a product with amorphous alloy structure.

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Neutron Diffraction with the Metallic Glass Ni31Dy69 ( + 10 a/o D) Using Isotopic Substitution

Zeitschrift für Naturforschung A ◽

10.1515/zna-1985-0214 ◽

1985 ◽

Vol 40 (2) ◽

pp. 191-192

Author(s):

A. Wildermuth ◽

P. Lamparter ◽

S. Steeb

Keyword(s):

Amorphous Alloy ◽

Neutron Diffraction ◽

Metallic Glass ◽

Structure Factor ◽

Isotopic Substitution ◽

Diffraction Experiment ◽

Partial Structure ◽

Neutron Diffraction Experiment ◽

Partial Structure Factor ◽

Structure Factors

By neutron diffraction using the method of isotopic substitution with the amorphous alloy Ni31Dy69 the partial structure factors SNiNi, SDyDy and SNiDy were obtained, furthermore with the same specimen containing 10 a/o deuterium a partial structure factor SDD resulted. For the evaluation of SDD it was necessary to perform the neutron diffraction experiment with an alloy whose both components were zero scattering isotopic mixtures of Ni or Dy, respectively.

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Amorphous alloys for electrocatalysis: The significant role of the amorphous alloy structure

Nano Research ◽

10.1007/s12274-021-3682-7 ◽

2021 ◽

Author(s):

Xingyun Li ◽

Weizheng Cai ◽

Dong-Sheng Li ◽

Jun Xu ◽

Huabing Tao ◽

...

Keyword(s):

Amorphous Alloy ◽

Significant Role ◽

Amorphous Alloys ◽

Alloy Structure

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A Combined Composition Design for Metallic Glasses from Thermodynamic and Structure Rules

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.988.169 ◽

2014 ◽

Vol 988 ◽

pp. 169-172

Author(s):

S.Z. Yang ◽

X. Han ◽

J. Zhao ◽

X. Ji

Keyword(s):

Amorphous Alloy ◽

Error Rate ◽

Metallic Glasses ◽

Amorphous Alloys ◽

Alloy Composition ◽

Design Method ◽

Composition Design ◽

Structural Rules ◽

Method Of Determination ◽

Structure Factors

A composition design method from thermodynamic and structural rules for metallic glasses is proposed in this paper. Using the above composition design method, BMG compositions could be determined quickly and it could guide the development of new amorphous alloys. Several new amorphous alloys were fabricated with this new method in Cu-Zr-Ti and Cu-Zr-Al alloying systems. Since this composition design provides a method of determination from both thermodynamic and atomic structure factors, this method increases the accuracy of the amorphous alloy composition design and reduces the development of new amorphous alloy error rate.

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Composition Dependence of Solid-State Amorphization Kinetics

MRS Proceedings ◽

10.1557/proc-205-189 ◽

1990 ◽

Vol 205 ◽

Author(s):

W. S. L. Boyer ◽

M. Atzmon

Keyword(s):

Solid State ◽

Amorphous Alloy ◽

Composition Dependence ◽

Composition Range ◽

Metastable Equilibrium ◽

Terminal Phase ◽

Common Tangent ◽

Ni Content ◽

The Common ◽

State Amorphization

AbstractSolid-state amorphization rates have been measured for amorphous Ni1-cMc in contact with the crystalline terminal phase M, (M=Hf or Zr). The interdiffusion coefficient Dis found to depend on the composition of the amorphous phase, with higher Ni content resulting in a higher Dover the composition range Ni67Hf33 to Ni47Hf53. The common tangent composition at which the amorphous alloy is in metastable equilibrium with the terminal crystalline phase is found to be greater than 70 at.% Hf, which is considerably higher than previously reported values. This discrepancy is explained in terms of the interdiffusion coefficient's variation with composition.

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Some Applications of the U. S. Steel MVEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100070461 ◽

1973 ◽

Vol 31 ◽

pp. 4-5

Author(s):

J. S. Lally ◽

L. E. Thomas ◽

R. M. Fisher

Keyword(s):

Electron Diffraction ◽

Debye Temperature ◽

Metals And Alloys ◽

Critical Voltage ◽

Dynamical Diffraction ◽

Phase Structures ◽

Structure Factors ◽

Local Bonding ◽

Diffraction Phenomenon ◽

Multi Phase

A variety of materials containing many different microstructures have been examined with the USS MVEM. Three topics have been selected to illustrate some of the more recent studies of diffraction phenomena and defect, grain and multi-phase structures of metals and minerals.(1) Critical Voltage Effects in Metals and Alloys - This many-beam dynamical diffraction phenomenon, in which some Bragg resonances vanish at certain accelerating voltages, Vc, depends sensitively on the spacing of diffracting planes, Debye temperature θD and structure factors. Vc values can be measured to ± 0.5% in the HVEM ana used to obtain improved extinction distances and θD values appropriate to electron diffraction, as well as to probe local bonding effects and composition variations in alloys.

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