Short range order in Al–Fe–Nb, Al–Fe–Ce and Al–Ni–Ce metallic glasses

Saporiti, F.; Boudard, Michel; Audebert, F.

doi:10.1016/j.jallcom.2009.12.001

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…This type of amorphous phase can be observed in alloys with large fraction of the main component of the alloy, for example in Al-or Mg-based alloys 23 . F. Audebert & col. have studied several Al-Fe and Al-Ni based alloys with Al content higher than 85at% [23][24][25][26][27] . They found that amorphous phases with this heterogeneous characteristic show a pre-peak at low angle in the X-ray diffractogram, which is related with the strong chemical short range order due to the hetero-atomic clusters.…”

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confidence: 99%

Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

et al. 2016

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Rapidly solidified Mg based alloys are of interest for industrial applications as a structural material and for hydrogen storage. Mg-Cu-Rare Earth alloys have shown high glass forming ability; full amorphous structure with thickness of mm size can be obtained within these systems. However, their brittle behavior limits their industrial applications. In the present work, the Al effect in substitution of Cu in the Mg 65 Cu 25 MM 10 (at%, MM: mischmetal) was studied. Samples up to 15at% Al were prepared by splat cooling and their microstructure, stability and mechanical properties were characterised. The crystallization temperature increases with the Al addition; the amorphous phase with different Al content has a Young's modulus of ~55GPa; the microhardness increases with the Al content in the amorphous and crystallized samples and the fracture of the alloy containing 10at% Al showed ductile vein patterns characteristics of ductile metallic glasses. The partial Cu substitution by Al can improve the stability and mechanical properties of the amorphous Mg 65 Cu 25 MM 10 alloy.

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confidence: 99%

Effect of Al addition to Rapidly Solidified Mg-Cu-Rare Earth Alloys

et al. 2016

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“…On the other hand, there are different experimental techniques such as X-ray scattering (Matsubara et al, 1989;Antonowicz, 2010;Saporiti et al, 2010), neutron diffraction (Hsieh et al, 1990), electron diffraction (Li et al, 2009) and extended X-ray absorption fine-structure (EXAFS) spectroscopy (Saksl et al, 2005;Zalewski et al, 2009) which are very useful to study the glassy phase and the local atomic structure in metallic glasses (MGs). Among them, EXAFS is elementselective and probes the local environment such as coordination numbers (CNs), bond distances (R), and their distribution around the absorbing atomic species such as transition metal (TE) and rare earth (RE) (Xiong et al, 2019;Dziegielewski et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Local structure investigation of Co–Fe–Si–B ribbons by extended X-ray absorption fine-structure spectroscopy

Deshmukh¹,

Srivastava²,

Singh³

et al. 2021

J Synchrotron Radiat

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In the present work, extended X-ray absorption fine-structure (EXAFS) investigations of Co69Fe x Si21–x B10 (x = 3, 5, 7) glassy ribbons were performed at the Co K-edge. The magnitude of the first peak of the Fourier transforms of the EXAFS signals is found to increase monotonically with increasing Si concentrations indicating the formation of the localized ordered structure at the atomic scale. The Co–Si coordination number (CN) increases at the expense of the CN of Co/Fe. Smaller interatomic distances are observed in the glassy phase compared with that in the crystalline phase which promotes the stability of the glassy phase. Calculations of the thermodynamic parameter (P HSS), cohesive energy (E C) and the atomic radius difference (δ) parameter show that the alloy composition Co69Fe3Si18B10 has a good glass-forming ability (GFA) with the highest CN of Si compared with other compositions. A linear correlation of CN with that of the GFA parameter (P HSS) exists and the CN also plays a crucial role in the GFA of the glassy alloys. This parameter should be considered in developing different GFA criteria.

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“…The microstructure of melt-spun alloys, which is believed to have a significant influence on the annealed nanocrystalline alloys, is worthy of researching and concerning. Based on the synchrotron X-ray diffraction and extended X-ray absorption fine structure measurements (EXAFS), molecular-dynamics and reverse Monte Carlo simulations manifest that amorphous alloy is efficiently packed by quasi-equivalent short-medium clusters [2][3][4]. However, direct observation of the detailed microstructure of amorphous alloy is still a challenge.…”

Section: Introductionmentioning

confidence: 99%