Influence of Short Range Order, Electron Concentration and Size Misfit on the Structure and Thermal Stability of Metallic Glasses

1983 ◽  
Vol 28 ◽  
Author(s):  
H. W. Bergmann ◽  
U. Luft ◽  
H. U. Fritsch
Keyword(s):  
Thermal Stability ◽  
Curie Temperature ◽  
Electron Concentration ◽  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Spectroscopy Data ◽  
Thermal Stability Of ◽  
Stable And Metastable Phases

ABSTRACTThe influence of short range order, electron concentration and size misfit on the thermal stability of (Fe100-xMx)83B17 metallic glasses has been investigated (M = Cr, Mn, Co, Ni, Mo, W). The results are discussed together with Curie-temperature measurements and Mößbauer spectroscopy data. The concentration range in which the various stable and metastable phases form is given.

On the microstructure and thermal stability of rapidly quenched Fe–B alloys in the intermediate composition range between the crystalline and amorphous states

1995 ◽  
Vol 10 (8) ◽  
pp. 1917-1926 ◽  
Author(s):  
M.B. Fernández van Raap ◽  
F.H. Sánchez ◽  
Y.D. Zhang
Keyword(s):  
Thermal Stability ◽  
Short Range ◽  
Short Range Order ◽  
Spin Echo ◽  
Iron Concentration ◽  
Range Order ◽  
Boride Phase ◽  
Equilibrium Phases ◽  
Amorphous States ◽  
Thermal Stability Of

The structure and the thermal stability of the Fe0.89B0.11 rapidly quenched alloy have been investigated. Transmission Mössbauer measurements were carried out as a function of temperature in the range from 148 K to 513 K. Room temperature x-ray diffraction and transmission and conversion-electron Mössbauer experiments, as well as 4.2 K spin-echo nuclear magnetic resonance measurements, were also performed after some selected thermal treatments for one hour between 523 K and 1273 K. Based on these experiments it is suggested that the alloy is inhomogeneous at nanoscopic scale and consists of a fine dispersion of a defective boride phase with an o-Fe3B-like short-range order, embedded in an α-Fe matrix. This result gives support to the models which indicate phase separation in the amorphous phase with o-Fe3B short-range order prevailing in the hypereutectic iron concentration range. This phase was found to be less stable than the undefective one present in the less boron concentrated alloys. The transformation into the equilibrium phases, analyzed with an Arrhenius-type temperature dependence for the increase of the relative fraction of Fe2B, led to an activation energy Ea = 1.38 ± 0.68 eV/atom.

scholarly journals Giant coercivities and chemical short‐range order in Pr‐Ga‐Fe metallic glasses

1982 ◽  
Vol 53 (3) ◽  
pp. 2330-2332 ◽  
Author(s):  
S. G. Cornelison ◽  
D. J. Sellmyer ◽  
J. G. Zhao ◽  
Z. D. Chen
Keyword(s):  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Range Order

Changes in Short-Range Order Resulting from Hydrogen Absorption of Fe2Ce and Fe2Er Metallic Glasses

1988 ◽  
pp. 223-226
Author(s):  
M. MATSUURA ◽  
K. FUKAMICHI ◽  
H. KOMATSU ◽  
K. AOKI ◽  
T. MASUMOTO ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Hydrogen Absorption ◽  
Short Range ◽  
Short Range Order ◽  
Range Order

SHORT RANGE ORDER OF METALLIC GLASSES

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-246-C8-249 ◽  
Author(s):  
A. S. Schaafsma ◽  
I. Vincze ◽  
F. Van der Woude ◽  
T. Kemèny ◽  
A. Lovas
Keyword(s):  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Range Order

Short-range order of Zr62−xTixAl10Cu20Ni8 bulk metallic glasses

2002 ◽  
Vol 50 (2) ◽  
pp. 305-314 ◽  
Author(s):  
N. Mattern ◽  
U. Kühn ◽  
H. Hermann ◽  
H. Ehrenberg ◽  
J. Neuefeind ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Bulk Metallic Glasses ◽  
Range Order

Local structure of the Zr–Al metallic glasses studied by proposed n-body potential through molecular dynamics simulation

2010 ◽  
Vol 25 (9) ◽  
pp. 1679-1688 ◽  
Author(s):  
S.Z. Zhao ◽  
J.H. Li ◽  
B.X. Liu
Keyword(s):  
Molecular Dynamics ◽  
Metallic Glasses ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Dynamics Simulation ◽  
Face Centered Cubic ◽  
Dynamics Simulations ◽  
Body Potential ◽  
Pair Analysis

An n-body potential is first constructed for the Zr–Al system and proven to be realistic by reproducing a number of important properties of the system. Applying the constructed potential, molecular dynamics simulations, chemical short-range order (CSRO) calculation, and Honeycutt and Anderson (HA) pair analysis are carried out to study the Zr–Al metallic glasses. It is found that for the binary Zr–Al system, metallic glasses are energetically favored to be formed within composition range of 35–75 at.% Al. The calculation shows that the CSRO parameter is negative and could be up to −0.17, remarkably indicating that there exists a chemical short-range order in the Zr–Al metallic glasses. The HA pair analysis also reveals that there are diverse short-range packing units in the Zr–Al metallic glasses, in which icosahedra and icosahedra/face-centered cubic (fcc)-defect structures are predominant.

Noncrystalline Solids Prepared by Compacting Nanometer — Sized Particles

1990 ◽  
Vol 195 ◽  
Author(s):  
J. Weissmüller ◽  
J. Jing ◽  
A. Krämer ◽  
R. Birringer ◽  
U. Gonser ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Atomic Structure ◽  
Short Range ◽  
Short Range Order ◽  
Amorphous Solids ◽  
Range Order ◽  
New Method ◽  
X Ray Diffraction ◽  
X Ray

ABSTRACTA new method of preparing amorphous solids is presented. X-ray diffraction, thermal stability and Mgssbauer spectroscopy give evidence for an atomic structure with reduced short–range order in Si75Auz5 and Pd72FeloSil8 alloys prepared by this method.

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