Effect of Sodium Penetration on Microscopic Deformation of Carbon-Based Cathode Materials During Aluminum Electrolysis

• Autorzy: Liu Hitao , Huang Yunhong , Wang Wei , Zhang Ziyang , Dang Hengyao

Identyfikatory

DOI

10.24425/amm.2022.137818

• Języki publikacji: EN

Abstrakty

EN

In this paper, the macroscopic and microscopic deformation caused by sodium penetration in the carbon cathode has been studied during aluminum electrolysis. The distributions of sodium concentration in the carbon cathode has been measured by SEM-EDS. The microstructure change caused by the gradient of the sodium concentration in the carbon cathode has been studied using transmission electron microscopy (TEM). The results indicate that sodium penetration decreases with the increase of the penetration depth. The stresses caused by the gradient of the sodium concentration result in a remarkable change for the microstructure of the carbon cathode. The formation of dislocations resulting in dislocation arrays and the development of kink band networks bring about material damage growth and possibly subsequent weakening of the cathode. These results can provide useful information that is helpful in developing an improved comprehending of the microscopic deformation mechanism of the carbon cathode during aluminum electrolysis.

Słowa kluczowe

EN

carbon cathode; microstructure; sodium penetration; dislocation; kink band

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 2
• Strony: 779--785
• Opis fizyczny: Bibliogr. 30 poz., fot., rys., tab.

Twórcy

autor

Liu Hitao

• Henan University of Science and Technology, College of Materials Science and Engineering, Luoyang 471023, China
• Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China
• Henan Key Laboratory of Non-ferrous Materials Science & Processing Technology, Luoyang 471023, China

• https://orcid.org/0000-0003-1516-8343

autor

Huang Yunhong

• Henan University of Science and Technology, Engineering Training Center, Luoyang 471023, China

• https://orcid.org/0000-0003-0751-3741

autor

Wang Wei

• Henan University of Science and Technology, College of Materials Science and Engineering, Luoyang 471023, China
• Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China
• Henan Key Laboratory of Non-ferrous Materials Science & Processing Technology, Luoyang 471023, China

• https://orcid.org/0000-0002-8919-4010

autor

Zhang Ziyang

• Henan University of Science and Technology, College of Materials Science and Engineering, Luoyang 471023, China
• Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China
• Henan Key Laboratory of Non-ferrous Materials Science & Processing Technology, Luoyang 471023, China

• https://orcid.org/0000-0001-5520-6768

autor

Dang Hengyao

• Luoyang Ship Material Research Institute, Luoyang 471023, China

• https://orcid.org/0000-0002-2619-147X

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Uwagi

1. The support from National Natural Science Foundation of China (NSFC) [grant number U1704154] was gratefully acknowledged.

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).