Correlation between icosahedral short range order, glass forming ability, and thermal stability of Zr–Ti–Ni–Cu–(Be) glasses

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.

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Effect of Compositional Short Range Order on Glass Formation in Binary Metallic System

MRS Proceedings ◽

10.1557/proc-754-cc6.16 ◽

2002 ◽

Vol 754 ◽

Author(s):

Hao Chen ◽

Mahadevan Khantha ◽

Takeshi Egami

Keyword(s):

Glass Transition ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Glass Formation ◽

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Dynamics Simulation ◽

Glass Forming

ABSTRACTMolecular Dynamics simulation was carried out to study the glass transition and crystallization in the metal-metalloid binary system with pair-wise potentials. The results show that a repulsive potential between metalloid (small) atoms increases the glass forming ability. The observation is consistent with the recent theory of bulk metallic glass formation through local glass transition and nano-glass formation. The theory predicted that the compositional short-range order (CSRO) prevents the small atom pairing so as to increase the glass forming ability (GFA). The present results demonstrate the important role of CSRO in bulk metallic glass formation.

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Chemical short-range order domain in bulk amorphous alloy and the prediction of glass forming ability

Science in China Series E ◽

10.1360/02ye0082 ◽

2003 ◽

Vol 46 (6) ◽

pp. 581 ◽

Cited By ~ 7

Author(s):

Xidong HUI

Keyword(s):

Amorphous Alloy ◽

Short Range ◽

Short Range Order ◽

Glass Forming Ability ◽

Range Order ◽

Bulk Amorphous Alloy ◽

Glass Forming ◽

Order Domain

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

Journal of Materials Research ◽

10.1557/jmr.1995.1917 ◽

1995 ◽

Vol 10 (8) ◽

pp. 1917-1926 ◽

Cited By ~ 6

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.

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