Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes
The plasma electrolytic oxidation (PEO) of pure Al and Al alloys containing 4, 9, 12, or 15 wt.% Si were investigated under pulsed bipolar current and pulsed bipolar voltage modes, respectively. It was determined that the discharge sparks preferentially occurred on the SiO<sub>2</sub> re...
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MDPI AG
2022-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/1/123 |
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| author | Kang Li Guoge Zhang Aihua Yi Wen Zhu Zhongmiao Liao Ken Chen Wenfang Li Zhenyuan Luo |
| author_facet | Kang Li Guoge Zhang Aihua Yi Wen Zhu Zhongmiao Liao Ken Chen Wenfang Li Zhenyuan Luo |
| author_sort | Kang Li |
| collection | DOAJ |
| description | The plasma electrolytic oxidation (PEO) of pure Al and Al alloys containing 4, 9, 12, or 15 wt.% Si were investigated under pulsed bipolar current and pulsed bipolar voltage modes, respectively. It was determined that the discharge sparks preferentially occurred on the SiO<sub>2</sub> relative to the Al<sub>2</sub>O<sub>3</sub> during the initial stage of PEO processing regardless of the power mode. Following 30 min of PEO treatment under the two modes, the thicknesses of the layers decreased, whereas their specific energy consumption increased with increasing Si content in the matrix. The presence of primary Si in the alloy with 15 wt.% Si had a significantly negative effect on the PEO process in the pulsed bipolar current mode: The layer thickness decreased by 45%, and its specific energy consumption increased by 52%, compared with those on pure Al. However, in the pulsed bipolar voltage mode, the layer thickness on the evaluated samples only decreased slightly, and it became much more similar after treatment. |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T01:40:33Z |
| publishDate | 2022-01-01 |
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| spelling | doaj.art-9f742ed8266c49be922e1d815dfa70e92023-11-23T13:25:36ZengMDPI AGCrystals2073-43522022-01-0112112310.3390/cryst12010123Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power ModesKang Li0Guoge Zhang1Aihua Yi2Wen Zhu3Zhongmiao Liao4Ken Chen5Wenfang Li6Zhenyuan Luo7College of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, South China University of Technology, Guangzhou 510641, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaCollege of Materials Science and Technology, Dongguan University of Technology, Dongguan 523820, ChinaThe plasma electrolytic oxidation (PEO) of pure Al and Al alloys containing 4, 9, 12, or 15 wt.% Si were investigated under pulsed bipolar current and pulsed bipolar voltage modes, respectively. It was determined that the discharge sparks preferentially occurred on the SiO<sub>2</sub> relative to the Al<sub>2</sub>O<sub>3</sub> during the initial stage of PEO processing regardless of the power mode. Following 30 min of PEO treatment under the two modes, the thicknesses of the layers decreased, whereas their specific energy consumption increased with increasing Si content in the matrix. The presence of primary Si in the alloy with 15 wt.% Si had a significantly negative effect on the PEO process in the pulsed bipolar current mode: The layer thickness decreased by 45%, and its specific energy consumption increased by 52%, compared with those on pure Al. However, in the pulsed bipolar voltage mode, the layer thickness on the evaluated samples only decreased slightly, and it became much more similar after treatment.https://www.mdpi.com/2073-4352/12/1/123plasma electrolytic oxidationAl alloySi contentpulsed bipolar currentpulsed bipolar voltage |
| spellingShingle | Kang Li Guoge Zhang Aihua Yi Wen Zhu Zhongmiao Liao Ken Chen Wenfang Li Zhenyuan Luo Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes Crystals plasma electrolytic oxidation Al alloy Si content pulsed bipolar current pulsed bipolar voltage |
| title | Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes |
| title_full | Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes |
| title_fullStr | Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes |
| title_full_unstemmed | Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes |
| title_short | Effects of Matrix Silicon Content on the Plasma Electrolytic Oxidation of Al-Si Alloys Using Different Power Modes |
| title_sort | effects of matrix silicon content on the plasma electrolytic oxidation of al si alloys using different power modes |
| topic | plasma electrolytic oxidation Al alloy Si content pulsed bipolar current pulsed bipolar voltage |
| url | https://www.mdpi.com/2073-4352/12/1/123 |
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