X-ray diffraction study of the structure of Al-Ni melts

Roik, O.S.; Samsonnikov, A. V.; Kazimirov, V. P.; Sokol’skii, V. È.

doi:10.1134/s0036029506030049

Cited by 12 publications

(8 citation statements)

References 7 publications

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“…Since the size of atomic clusters at certain temperatures has been measured by centrifugal process or X-ray diffraction experiment [28,29], and the radius r c obtained by X-ray diffraction experiment represents the lower limit of the size of atomic clusters [30], it can be concluded that the theoretical calculation results agree well with those of experiments.…”

Section: Evolution Behavior Of Atomic Clusters In Liquid Structuresupporting

confidence: 52%

Structure and property of metal melt III—Relationship between kinematic viscosity and size of atomic clusters

Popel

et al. 2010

Sci. China Phys. Mech. Astron.

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The method of crucible rotating oscillation damping was employed to measure the kinematic viscosity of aluminum melt, and the curve of viscosity v versus temperature T from 935 to 1383 K was obtained. Besides, based on the calculation model of the evolution behavior of atomic clusters in liquid structure, the curve of atomic clusters size d versus temperature was obtained, and the calculated results are in good agreement with the experimental values. By analyzing experimental data, it was found that both the viscosity and the size of atomic clusters of aluminum melt are monodrome functions of temperature, and the relation between v(T) and d(T) is a linear function, i.e., v = v 0 + K·d(T). This relation indirectly verifies the calculation model of the structural information of metal melt, which is of great significance for studying the relation between melt microstructure and macro-physical properties. kinematic viscosity, atomic cluster, linear relation, melt structural information, model validation PACS: 62.10.+s, 83.85.Jn, 61.25.-f, 61.25.Mv, 61.20.GyAs a kind of primary state of matter, the liquid state has its own special structure and physical properties compared with the solid and gaseous states. In addition, the liquid state is the origin of crystalline and some non-crystalline materials. So it is very important to investigate liquid, especially the high temperature melts [1]. However, the research on the structures, properties and evolution behaviors of liquid is far not enough [2].Since the formula for calculating the viscosity of liquid was deduced according to the radial distribution function and atomic interaction potential, study of the relationship between microstructure and viscosity of liquid metal has been always an important and difficult task in condensed matter physics [3,4]. In the past 60 years, the properties and nature of viscosity were intensively researched, and many theoretical models and empirical formulas were proposed to describe the relationship between viscosity and temperature, viscosity and melt structure [5][6][7][8][9], such as the Born-Green formula built on the distribution function, the Frenkel model based on the cavity theory, the Iida correction model of the Andrade relationship deduced by the Lindemann melting laws and so on, those laid a good foundation for the knowledge of the microstructure of melt through the variation law of viscosity. However, due to the complexity of the microstructure of metal melt and the instability of the measurement of viscosity, the relationship between viscosity and melt structure is still not very clear, and the existing models or formulas cannot directly reflect the simple relationship between them. In this paper we will give a further description on this relationship based on the theory of micro-inhomogeneity of liquid metal.In the authors' previous work, the calculation model for structure information of metal melt was obtained through

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Section: Evolution Behavior Of Atomic Clusters In Liquid Structuresupporting

confidence: 52%

Structure and property of metal melt III—Relationship between kinematic viscosity and size of atomic clusters

Popel

et al. 2010

Sci. China Phys. Mech. Astron.

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“…This difficulty in amorphization is due to the formation of atomic ordering in the liquid melts. Roik et al (2006) studied aluminum-nickel melt structure, and believe that this is difficulty in amorphization of Al 3 Ni is due to the retention of a fraction of the covalent bonding within the melt, which ultimately prevents dense noncrystalline atomic packing. Roik et al (2009) also calculated the structure parameters for aluminum nickel melts, such as the nearest neighbor distance (R 1 ).…”

Section: Microstructure Evaluation Of Esd Depositmentioning

confidence: 98%

Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process

Heard

Brochu

2010

Journal of Materials Processing Technology

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“…The selection of the cut-off distances d(AlÀ Sn) = 2.1, d(AlÀ Ni) = 2.4, and d(NiÀ Sn) = 2.3 Å was based on our preliminary studies for corresponding binary liquid alloys. [4,10,16] Partial structure factors, S ij (Q), and partial pair distribution functions, g ij (R), are calculated from RMC models according to Faber-Ziman formalism.…”

Section: Conflict Of Interestsmentioning

confidence: 99%

“…The phase diagram of the AlÀ Ni binary system contains several crystalline and quasi-crystalline phases. [3] The AlÀ Ni melts are characterized by significant negative deviations of the concentration dependence of the nearest interatomic distance (R 1 ) from additivity [4] and the exothermic value of the enthalpy of mixing with the maximum value ΔH max = À 50 kJ mol À 1 at χ Al � 50 at.%. [5] This fact indicates the priority of heteroatomic coordination in AlÀ Ni melts.…”

Section: Introductionmentioning

confidence: 99%

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Formation of the Short‐Range Order in Liquid Al−Ni−Sn Alloys

et al. 2023

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Short-range order (SRO) in the liquid AlÀ NiÀ Sn alloys has been investigated using the X-ray diffraction method and Reverse Monte Carlo simulations. Obtained results point out a microinhomogeneous structure of AlÀ SnÀ Ni melts with Sn content between 10 and 65 at.% due to the presence of atomic clusters with the structure of liquid Sn and atomic clusters with NiÀ Sn coordination. The influence of the atomic size ratio (size factor) and pair atomic interactions (energy factor) on the short-range order of the investigated ternary melts are discussed. There is a competition between Al and Sn atoms in the formation of the SRO around Ni atoms due to the difference in bond energy in NiÀ Al and NiÀ Sn pairs. This competition, as well as a bigger radius of Sn atoms, results in the formation of atomic clusters with liquid Sn-like local atomic structure.

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X-ray diffraction study of the structure of Al-Ni melts

Cited by 12 publications

References 7 publications

Structure and property of metal melt III—Relationship between kinematic viscosity and size of atomic clusters

Structure and property of metal melt III—Relationship between kinematic viscosity and size of atomic clusters

Development of a nanostructure microstructure in the Al–Ni system using the electrospark deposition process

Formation of the Short‐Range Order in Liquid Al−Ni−Sn Alloys

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