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Zhuo J, Rui Z, Lyu X, He D, Ding S, Sun H, Dong Y. The effect of crystallographic orientation of α-Al 2O 3on the wetting behavior and adhesion characteristics of aluminum droplets. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:195001. [PMID: 38295435 DOI: 10.1088/1361-648x/ad24bc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 01/31/2024] [Indexed: 02/02/2024]
Abstract
To solve the problem of adhesion of aluminum fluid to the inner wall of the vacuum ladle in the aluminum electrolysis industry, molecular dynamics simulation is performed to research the wetting behavior of Al droplets on the surfaces of theα-Al2O3substrates C (0001), M (11-00), and R (11-02) at 1073 K. Meanwhile, the adhesion characteristics of the Al droplet are evaluated by the potential of the mean force (PMF) for the separation of the Al droplets from different surfaces of theα-Al2O3substrate. The results show that the wetting behavior of Al droplets on theα-Al2O3substrate is influenced by the different crystallographic orientations. The diffusion of Al droplets in thex-o-yplane of the substrate exhibits isotropic. The PMF and the interfacial potential energy reveal that the magnitude of the adhesion work in the solid-liquid separation of Al droplets fromα-Al2O3substrates follows the order C (0001) > R (11-02) > M (11-00). These findings characterize the wetting properties and adhesion behavior of Al droplets on an atomic scale and provide a theoretical basis for the selection of materials for the inner wall of the vacuum ladle.
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Affiliation(s)
- Junting Zhuo
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Zhiyuan Rui
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Xin Lyu
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Dongyun He
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Simin Ding
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Huaming Sun
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Yun Dong
- School of Mechanical and Electrical Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
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Hu X, Jiang G, Fan P, Hu G, Xu G, Wang W, Wang L, Zhang H, Zhong M. 1000 °C High-Temperature Wetting Behaviors of Molten Metals on Laser-Microstructured Metal Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17538-17550. [PMID: 37991347 DOI: 10.1021/acs.langmuir.3c03007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
The melting of metals at high temperatures is common and important in many fields, e.g., metallurgy, refining, casting, welding, brazing, even newly developed batteries, and nuclear fusion, which is thus of great value in modern industrialization. However, the knowledge of the wetting behaviors of molten metals on various substrate surfaces remains insufficient, especially when the temperature is over 1000 °C and with microstructured metal substrate surfaces. Herein, we selected molten cerium (Ce) on a tantalum (Ta) substrate as an example and investigated in detail its wetting at temperatures up to 1000 °C by modulating the microstructures of the substrate surfaces via laser processing. We discovered that the wetting states of molten Ce on Ta surfaces at temperatures over 900 °C could be completely altered by modifying the laser-induced surface microstructures and the surface compositions. The molten Ce turned superlyophilic with its contact angle (CA) below 10° on the only laser-microstructured surfaces, while it exhibited lyophobicity with a CA of about 135° on the laser-microstructured plus oxidized ones, which demonstrated remarkably enhanced resistance against the melt with only tiny adhesion in this circumstance. In contrast, the CA of molten Ce on Ta substrate surfaces only changed from ∼25 to ∼95° after oxidization without laser microstructuring. We proved that modulating the substrate surface microstructures via laser together with oxidization was capable of efficiently controlling various molten metals' wetting behaviors even at very high temperatures. These findings not only enrich the understanding of molten metal high-temperature wettability but also enable a novel practical approach to control the wetting states for relevant applications.
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Affiliation(s)
- Xinyu Hu
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, Sichuan, P. R. China
| | - Guochen Jiang
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Peixun Fan
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Guoqiang Hu
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, Sichuan, P. R. China
| | - Gang Xu
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, Sichuan, P. R. China
| | - Wei Wang
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, Sichuan, P. R. China
| | - Lizhong Wang
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Hongjun Zhang
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
| | - Minlin Zhong
- Laser Materials Processing Research Center, School of Materials Science and Engineering, Tsinghua University, Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, P. R. China
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