Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys
Although the ultrasonic treatment of molten aluminum has been studied for long period, there is still much to be revealed for this process. Many studies have focused on the investigation of acoustic cavitation and streaming under the horn tip and their effects on the treatment efficiency. However, t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417722003054 |
| _version_ | 1797983878076432384 |
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| author | Jincheng Sun Kennosuke Higashi Sergey Romankov Takuya Yamamoto Sergey Komarov |
| author_facet | Jincheng Sun Kennosuke Higashi Sergey Romankov Takuya Yamamoto Sergey Komarov |
| author_sort | Jincheng Sun |
| collection | DOAJ |
| description | Although the ultrasonic treatment of molten aluminum has been studied for long period, there is still much to be revealed for this process. Many studies have focused on the investigation of acoustic cavitation and streaming under the horn tip and their effects on the treatment efficiency. However, to the best of our knowledge, no attempt has been done to explain phenomena occurring near or on the melt free surface. Thus, the goal of this study is to investigate phenomena occurring at the free surface during ultrasound irradiation and clarify their possible influence on the ultrasound treatment performance. The results of high temperature and water model experiments reveal that ultrasound irradiation significantly promotes the formation of alumina particles on the melt free surface around sonotrode, and part of these particles can be entrained into aluminum melts. Furthermore, TEM observation results suggested that the entrained alumina inclusions can serve as nucleation sites for the primary Al3Zr compounds. Most importantly, the oxidation and entrainment of particles from free surface are likely to be controllable by the immersion depth of sonotrode into molten aluminum. |
| first_indexed | 2024-04-11T06:54:09Z |
| format | Article |
| id | doaj.art-0a396a753cf64dd28bf18546c2492037 |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-04-11T06:54:09Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-0a396a753cf64dd28bf18546c24920372022-12-22T04:39:05ZengElsevierUltrasonics Sonochemistry1350-41772022-11-0190106209Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloysJincheng Sun0Kennosuke Higashi1Sergey Romankov2Takuya Yamamoto3Sergey Komarov4Graduate School of Environmental Studies, Tohoku University, 6-6-02 Aza Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Corresponding author.Department of Metallurgy, Materials Science and Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, JapanDepartment of Metallurgy, Materials Science and Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, JapanGraduate School of Environmental Studies, Tohoku University, 6-6-02 Aza Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Department of Metallurgy, Materials Science and Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, JapanGraduate School of Environmental Studies, Tohoku University, 6-6-02 Aza Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan; Department of Metallurgy, Materials Science and Materials Processing, Graduate School of Engineering, Tohoku University, 6-6-02 Aza-Aoba, Aramaki, Aoba-ku, Sendai 980-8579, JapanAlthough the ultrasonic treatment of molten aluminum has been studied for long period, there is still much to be revealed for this process. Many studies have focused on the investigation of acoustic cavitation and streaming under the horn tip and their effects on the treatment efficiency. However, to the best of our knowledge, no attempt has been done to explain phenomena occurring near or on the melt free surface. Thus, the goal of this study is to investigate phenomena occurring at the free surface during ultrasound irradiation and clarify their possible influence on the ultrasound treatment performance. The results of high temperature and water model experiments reveal that ultrasound irradiation significantly promotes the formation of alumina particles on the melt free surface around sonotrode, and part of these particles can be entrained into aluminum melts. Furthermore, TEM observation results suggested that the entrained alumina inclusions can serve as nucleation sites for the primary Al3Zr compounds. Most importantly, the oxidation and entrainment of particles from free surface are likely to be controllable by the immersion depth of sonotrode into molten aluminum.http://www.sciencedirect.com/science/article/pii/S1350417722003054Molten aluminumUltrasonic treatmentMelt free surfaceParticles entrainmentPrimary Al3Zr compound |
| spellingShingle | Jincheng Sun Kennosuke Higashi Sergey Romankov Takuya Yamamoto Sergey Komarov Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys Ultrasonics Sonochemistry Molten aluminum Ultrasonic treatment Melt free surface Particles entrainment Primary Al3Zr compound |
| title | Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| title_full | Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| title_fullStr | Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| title_full_unstemmed | Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| title_short | Free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| title_sort | free surface entrainment of oxide particles and their role in ultrasonic treatment performance of aluminum alloys |
| topic | Molten aluminum Ultrasonic treatment Melt free surface Particles entrainment Primary Al3Zr compound |
| url | http://www.sciencedirect.com/science/article/pii/S1350417722003054 |
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