Structure of liquid Fe–Al alloys

Il’inskii, A.; Slyusarenko, S.; Slukhovskii, O.; Kaban, I.; Hoyer, W.

doi:10.1016/s0921-5093(01)01457-5

Cited by 54 publications

(33 citation statements)

References 8 publications

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“…The model of micro-inhomogeneous structure of multi-component proposed by Il'inskii and co-workers [19,20] are used. According to this model, the liquid alloy is assumed to consist of some micro-groupings, in other words, the liquid alloy is characterized by some special alloys.…”

Section: Resultsmentioning

confidence: 99%

Structure correlation of Al71.6Ge28.4 eutectic alloy between liquid and solid states

et al. 2010

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The liquid structure of Al 71.6 Ge 28.4 eutectic alloy was studied by X-ray diffractometer. For the liquid alloy Al 71.6 Ge 28.4 , the structure has no change while the order increases with the decreasing temperature from 1150°C to 550°C. Meanwhile, the correlation between liquid structure and solid structure has also been analyzed by "the nanocrystal model". It is shown that the melt consists of 72.8% α clusters and 27.2% β clusters, but the liquid structure and solid structure have striking difference, which is one of the reasons to obtain a large undercooling easily for this alloy. liquid structure, X-ray diffraction, nanocrystal model, liquid-solid correlation, undercooling Citation: Sun J J, Tian X L, Zhan C W, et al. Structure correlation of Al 71.6 Ge 28.4 eutectic alloy between liquid and solid state.The Al-Ge alloy is a simple eutectic system. It has been extensively investigated because of the metastable phase during solidification. The phase has an excellent performance in superconductivity [1-3]. McAlister and Murray [4] collected a lot of research results at an earlier stage. Based on these information, Srikanth et al. [5] observed the metastable phase diagram. Recently, Al-Ge alloy can obtain deep undercooling with an electromagnetic oscillating drop method [6,7], so more and more investigations have been performed on the metastable phase at a deep undercooling state.The liquid structure of Al-Ge alloy has also been investigated. The electronic density of states of this alloy has been measured by Gamppet et al. [8] both in the liquid and in the amorphous state. A decrease of density of states at the Fermi level has been measured for the amorphous state, a small one in the liquid state, vanishing with temperature. This feature has been explained as being induced by the atomic structure. Grosdidier and Gasser [9] obtained the structure factors by neutron scattering on liquid Al-Ge alloys. A characteristic peak was found on every curve of the structure factor. The peak decreased from aluminum-rich alloys to germanium-rich alloys. They pointed out that the particular shape of the alloy structure factor was mainly due to the germanium-germanium interaction.To sum up the above arguments, the investigations are a series of studies intended to focus on the fields of metastable phase and particularity of liquid structure. However, our understanding of liquid structures, including the structure correlation between liquid and solid states, is relatively imperfect although the investigations on the liquid structure have been carried out for a long time. It is still an important and unsolved problem in condensed state physics. In addition, the reason of undercooling state about Al-Ge alloy during solidification is hardly reported. So it is necessary to explore the cause of undercooling from the point of the structure correlation between liquid and solid states.In this paper, the scattering intensities of liquid Al 71.6 Ge 28.4 alloy were investigated by means of X-ray diffraction from the temperature above liqu...

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Section: Resultsmentioning

confidence: 99%

Structure correlation of Al71.6Ge28.4 eutectic alloy between liquid and solid states

et al. 2010

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“…were reported in the Al-Fe system. [9][10][11] The crystal structure of Al 3 Fe is known to be a monoclinic system with unit cell size a ¼ The vacuum centrifugal casting system was used in this experiment in order to avoid undesirable oxidization of the material. This system consists of an alloy melting furnace, inlet, mold, etc., which are set in a chamber of about 0.2 m 3 as shown in Fig.…”

Section: Materials and Vacuum Centrifugal Methodsmentioning

confidence: 99%

“…1. Al-Fe alloy containing more than 10 mass% Fe has a higher melting point, which makes dissolution in the system difficult, and in addition, a temperature of over 900 C causes severe [9][10][11][12][13][14] However it is meaningful to measure the basic mechanical properties of Al-Al 3 Fe FGM for the development of FGM as a structural and/or component material when the recycling system is established, expecting therefore an increase in the practical interest of the Al-Al 3 Fe composite and Al-Al 3 Fe FGM.…”

Section: Introductionmentioning

confidence: 99%

Novel Recycling System of Aluminum and Iron Wastes-<I>in-situ</I> Al-Al<SUB>3</SUB>Fe Functionally Graded Material Manufactured by a Centrifugal Method-

et al. 2003

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In this study, the concept of novel recycling system using waste Al and Fe is described. Taking advantage of the fact that due to its cyclic usage, aluminum scrap unavoidably contains iron and steel wastes, an in-situ Al-Al 3 Fe functionally graded material (FGM) is planned to be fabricated. A centrifugal method is applied to a model master alloy, Al-10 mass% Fe, obtained from virgin materials, the content of which is decided from the liquidus temperature. The resulting product is a thick-walled tube having a graded distribution of second phase particles in the Al matrix. It has been established that the shape of the particles varies depending on their position along the radial direction. The second phase is confirmed to be a stable Al 3 Fe intermetallic compound. Thin plates of Al-Al 3 Fe having homogeneously distributed Al 3 Fe particles, considering both the composition gradient and the particle morphology, were machined from the thick-walled Al-Al 3 Fe FGM tube and their mechanical properties measured. Based on the experimental observations, the potential and the advantages of the Al-Al 3 Fe alloy as a recyclable eco-FGM are discussed.

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“…If the frequency is low enough (e.g., [15][16][17][18][19][20][21][22][23][24][25], the skin depth is greater. Therefore, a lower frequency electromagnetic field with suitable intensity cannot only increase its potential force, resulting in the formation of a convex surface (meniscus) and a decrease in the contacting pressure on the mold (soft contact), which can make smooth surface of ingots, but also leads to a higher rotational force, resulting in a stronger forced convection, which can produce more uniform solute and temperature field [7].…”

Section: Article In Pressmentioning

confidence: 99%

“…Mass spectrometry experiments on the early stages of nucleation have also shown that there are conspicuously large concentrations of clusters of certain masses, for instance, for Na clusters of 8, 20, 40, 58 and 92 atoms, and 8, 20, 40, 58 and 92 are always referred to as 'magic numbers' [24]. X-ray diffraction experiments on liquid Fe-Al and Al-Si alloys have shows that the liquid is micro-inhomogeneous and contains atomic micro-formations (clusters) [25,26]. The number and size of the atomic clusters are increased with the increasing undercooling.…”

Section: A Model Of Nucleation and The Effect Of Electromagnetic Vibrmentioning

confidence: 99%

Theoretical discussion of the effect of a low-frequency electromagnetic vibrating field on the as-cast microstructures of DC Al–Zn–Mg–Cu–Zr ingots

Dong

Chen

Ding

2006

Journal of Crystal Growth

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Structure of liquid Fe–Al alloys

Cited by 54 publications

References 8 publications

Structure correlation of Al71.6Ge28.4 eutectic alloy between liquid and solid states

Structure correlation of Al71.6Ge28.4 eutectic alloy between liquid and solid states

Novel Recycling System of Aluminum and Iron Wastes-<I>in-situ</I> Al-Al<SUB>3</SUB>Fe Functionally Graded Material Manufactured by a Centrifugal Method-

Theoretical discussion of the effect of a low-frequency electromagnetic vibrating field on the as-cast microstructures of DC Al–Zn–Mg–Cu–Zr ingots

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