Grain Refining of Pure Aluminum

Han, Lei; Vian, Corey; Song, Jie; Liu, Z.; Han, Qingyou; Xu, Clause; Shao, Lulu

doi:10.1002/9781118359259.ch168

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…The comprehensive analysis concluded that when the content of AlF3 was 10%-15%, the addition of AlF3, CaF2, LiF, and MgF2 would reduce the solubility of electrolyte Al2O3, and the strong and weak effects were in the order of LiF > MgF2 > CaF2 > AlF3. Han [8] studied the ionic architecture in the LiF-NaF-AlF3-Al2O3 molten salt system using IPMD and FPMD simulations, and the comprehensive analysis concluded that there are Al-F complex ions and Al-O-F ions exist in the LiF-NaF-AlF3-Al2O3 molten salt system. Furthermore, the addition of Li + decreases the coordination number between Al-F.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System

Zhou,

Zhang,

Zeng

et al. 2023

J. Phys.: Conf. Ser.

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The criticality of the physicochemical properties of the K3AlF6-Na3AlF6-AlF3 molten salt system to electrolytic aluminum production is a topic of great interest. In this study, molecular dynamics simulations were conducted to investigate the impact of Zr, B, C, W, Ti, Hf, Nb, and Ta on various properties including the radial distribution function, coordination number, viscosity, and conductivity of the 23.4K3AlF6-54.6Na3AlF6-22AlF3 molten salt electrolyte under conditions of 1173 K and standard atmospheric pressure. Significant and noteworthy discoveries were yielded by the simulations. A decrease in the coordination between Al-F and conductivity was brought about by the inclusion of B2-. Likewise, higher Zr4+ content resulted in a decrease in the coordination number between Al-F and viscosity. The impact of carbon was insignificant, while the presence of tungsten reduced the coordination number between Al-F. On the other hand, titanium, hafnium, niobium, and tantalum facilitated the decomposition of Al-F ligands, leading to an increased coordination between Al-F and the ions in the electrolyte. These findings provide valuable insights for future investigations on inert anodes containing Zr, B, Ti, Hf, Nb, and Ta. By understanding the effects of these elements on the physicochemical properties of the molten salt electrolyte, this work lays a solid foundation for further research in the field.

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Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System

Zhou,

Zhang,

Zeng

et al. 2023

J. Phys.: Conf. Ser.

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Ultrasonic Processing of Materials

Han

2015

Metall Mater Trans B

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Role of ultrasonic treatment, inoculation and solute in the grain refinement of commercial purity aluminium

Wang

Easton

et al. 2017

Sci Rep

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The present study investigates the influence of ultrasonic treatment on the grain refinement of commercial purity aluminium with a range of Al3Ti1B master alloy additions. When the aluminium contains the smallest amount of added master alloy, ultrasonics caused significant additional grain refinement compared to that provided by the master alloy alone. However, the influence of ultrasonics on grain size reduces with increasing addition of the master alloy which adds additional TiB2 particles and Ti solute with each incremental addition. Applying the Interdependence model to analyse the experimentally measured grain sizes revealed that the results of this study and those from similar experiments on an Al-2Cu alloy were consistent when the alloy compositions are converted to their growth restriction factors (Q) and that increasing Q had a major effect on reducing grain size and increasing grain number density. Compared with the application of ultrasonic treatment where an order of magnitude increase in the grain number density is achieved, an increase in the Ti content over the range of master alloy additions, causes the grain number density to increase by approximately three times.

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Grain Refining of Pure Aluminum

Cited by 4 publications

References 7 publications

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System

Ultrasonic Processing of Materials

Role of ultrasonic treatment, inoculation and solute in the grain refinement of commercial purity aluminium

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Grain Refining of Pure Aluminum

Cited by 4 publications

References 7 publications

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K3AlF6-Na3AlF6-AlF3 Molten Salt System

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K3AlF6-Na3AlF6-AlF3 Molten Salt System

Ultrasonic Processing of Materials

Role of ultrasonic treatment, inoculation and solute in the grain refinement of commercial purity aluminium

Contact Info

Product

Resources

About

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System

Molecular Dynamics Simulation of the Effect of Zr, B, C, W, Ti, Hf, Nb, and Ta Elements on the K₃AlF₆-Na₃AlF₆-AlF₃ Molten Salt System