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Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate

The cavitation characteristics during the spreading of a pure Sn liquid droplet subjected to ultrasonication were studied for the first time through high-speed photography to reveal the wetting mechanism. Ultrasonic vibration realized the spreading of Sn droplet on the nonwetting pure Al substrate....

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Detalles Bibliográficos
Autores principales: Li, Zhengwei, Xu, Zhiwu, He, Peng, Ma, Zhongwei, Chen, Shu, Yan, Jiuchun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8799618/
https://www.ncbi.nlm.nih.gov/pubmed/34969000
http://dx.doi.org/10.1016/j.ultsonch.2021.105893
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author Li, Zhengwei
Xu, Zhiwu
He, Peng
Ma, Zhongwei
Chen, Shu
Yan, Jiuchun
author_facet Li, Zhengwei
Xu, Zhiwu
He, Peng
Ma, Zhongwei
Chen, Shu
Yan, Jiuchun
author_sort Li, Zhengwei
collection PubMed
description The cavitation characteristics during the spreading of a pure Sn liquid droplet subjected to ultrasonication were studied for the first time through high-speed photography to reveal the wetting mechanism. Ultrasonic vibration realized the spreading of Sn droplet on the nonwetting pure Al substrate. However, the oxide layer of the substrate at the spreading front is difficult to remove. The high-speed photography result shows that a noncavitation region consistently appears at the spreading front, because the acoustic pressure is below the cavitation threshold of 1.26 MPa. In particular, the width of the noncavitation region gradually increases as the size of the spreading area increases. Such a result accounts for the condition wherein the oxide layer at the spreading front is difficult to remove. Furthermore, the bubble density during spreading gradually decreases due to the decreased acoustic pressure of the thinned liquid. Finally, the bubble dynamics were calculated to verify the wetting mechanism.
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spelling pubmed-87996182022-02-03 Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate Li, Zhengwei Xu, Zhiwu He, Peng Ma, Zhongwei Chen, Shu Yan, Jiuchun Ultrason Sonochem Short Communication The cavitation characteristics during the spreading of a pure Sn liquid droplet subjected to ultrasonication were studied for the first time through high-speed photography to reveal the wetting mechanism. Ultrasonic vibration realized the spreading of Sn droplet on the nonwetting pure Al substrate. However, the oxide layer of the substrate at the spreading front is difficult to remove. The high-speed photography result shows that a noncavitation region consistently appears at the spreading front, because the acoustic pressure is below the cavitation threshold of 1.26 MPa. In particular, the width of the noncavitation region gradually increases as the size of the spreading area increases. Such a result accounts for the condition wherein the oxide layer at the spreading front is difficult to remove. Furthermore, the bubble density during spreading gradually decreases due to the decreased acoustic pressure of the thinned liquid. Finally, the bubble dynamics were calculated to verify the wetting mechanism. Elsevier 2021-12-24 /pmc/articles/PMC8799618/ /pubmed/34969000 http://dx.doi.org/10.1016/j.ultsonch.2021.105893 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Short Communication
Li, Zhengwei
Xu, Zhiwu
He, Peng
Ma, Zhongwei
Chen, Shu
Yan, Jiuchun
Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title_full Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title_fullStr Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title_full_unstemmed Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title_short Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate
title_sort dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated al substrate
topic Short Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8799618/
https://www.ncbi.nlm.nih.gov/pubmed/34969000
http://dx.doi.org/10.1016/j.ultsonch.2021.105893
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