Fundamental Study on Wettability of Pure Metal by Liquid Sodium

Saito, Junichi; Shibutani, Hideo; Kobayashi, Yasuhiro

doi:10.1007/978-3-030-36628-5_55

Cited by 4 publications

(5 citation statements)

References 8 publications

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“…The electronic density of states for liquid sodium metals is already in the literature. 1) In this paper, the electronic density of states when the liquid metal is two tin atoms is shown in Fig. 9.…”

Section: Calculation Results 321 Electronic Density Of Statementioning

confidence: 98%

“…11(a) are tin and sodium. 1) The horizontal axis denotes the substrate metal, and the vertical axis denotes the bond order. The closed circle indicates the bond order between the center atom in the substrate metal and the firstnearest-neighbor atoms surrounding the center atom.…”

Section: Atomic Bondingmentioning

confidence: 99%

“…We have performed fundamental research on the static wettability of pure metals by liquid sodium with the aim of controlling such wettability. 1) In that paper, the static wettability of pure metals by liquid sodium was evaluated via an experiment, and theoretical calculation using simple interface models was conducted to understand the wettability. The atomic bond ratio, which is the proportion of the atomic bond between substrate metals to the atomic bond between the substrate metal and the sodium atom, correlated well with the contact angle obtained by the experiment.…”

Section: Introductionmentioning

confidence: 99%

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Wettability of Pure Metals with Liquid Sodium and Liquid Tin

2021

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This study aims to control the wettability of pure transition metals by liquid sodium or liquid tin. Such wettability was evaluated by measuring the contact angles with the droplet method. Pure titanium, iron, nickel, copper, and molybdenum metals were selected as specimens in this experiment. All experiments were conducted in an environment with high pure argon gas and extremely low moisture to avoid the influence of oxygen on the liquid metals. The measurement temperature was just above the melting temperature of each liquid metal. Results showed that in both liquid sodium and liquid tin, the measured contact angle changed depending on the atomic number of the substrate metal. The electronic structure of the interface between a liquid metal and a substrate metal was calculated by the molecular orbital method. Simple cluster models of the interface between the liquid metal and substrate transition metal were used in this calculation. The calculation results confirmed that the electronic state of the interface was expressed well. The magnitude of the atomic bonding between the liquid metal and substrate metal changed in accordance with the atomic number of the substrate metal, and the magnitude of the atomic bonding between the substrate metals changed similarly. There was an evident relationship between the atomic bonding ratio and the contact angle. The atomic bonding ratio is the ratio of the liquid-metal-substrate metal-atomic bonding to the substrate metal atomic bonding. This finding implies that the atomic bonding affected the wettability between the liquid metal and the substrate metal. The atomic bonding was obtained as one of the indications was obtained to control the wettability by liquid metal.

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Section: Calculation Results 321 Electronic Density Of Statementioning

confidence: 98%

Section: Atomic Bondingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wettability of Pure Metals with Liquid Sodium and Liquid Tin

2021

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“…Figure 13(a) shows the results of the contact angle,  , and Figure 13(b) shows the change rate in the contact angle,   . The change rate in the contact angle, Dq, from the unimplanted substrate metal was calculated using the following equation (1).…”

Section: Wettability With Liquid Sodium Of Sodium-implanted Substrate...mentioning

confidence: 99%

“…The results showed that the contact angle relates to the atomic interactions at the interface. [1][2][3][4] Therefore, we considered that one way to control wettability is to control the electronic state, which is the atomic interaction at the interface. Furthermore, we focused on ion implantation technology to change the electronic state of metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

Electronic Approach to Understanding the Wettability of Sodium-Implanted Metal

Saito,

Shibutani,

Kobayashi

et al. 2024

Preprint

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A change in the wettability of liquid sodium due to sodium implantation was evaluated theoretically. Interface models between sodium and a sodium-implanted substrate metal were created, and their electronic states were calculated. The discrete variational Xα cluster method was used in the calculations. The calculations show that the bond order, indicating the strength of the covalent bonds between atoms, decreases within the substrate metal and increases at the interface between sodium and the substrate metal due to sodium implantation. Their ratio, the bond order ratio, increased with the increasing sodium implantation. Previous studies have shown that wettability is better as the bond order ratio increases. Therefore, from the calculations results, wettability improves with increasing sodium implantation. The wettability of sodium-implanted metals was experimentally evaluated using the contact angle of the sodium droplets. The contact angle decreased, and the wettability improved due to sodium implantation. The change rate in the contact angle increased with the bond order ratio. The experimental and calculation results correlate well, without contradiction. In conclusion, sodium implantation changes the electronic state of the interface, affecting the wettability of liquid sodium.

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