Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy
The effect of the distribution of the primary phase Si and TiB<sub>2</sub> particles in the hypereutectic Al-Si alloy was studied and found to be influenced by the cooling rate. Therefore, this article studies the effect of the cooling rate on the multi-phase structure of TiB<sub>2...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/5/933 |
| _version_ | 1827740686961606656 |
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| author | Chuanyong Li Xingguo Zhang Zhengwei Guo Lu Li Quan Shan Zulai Li |
| author_facet | Chuanyong Li Xingguo Zhang Zhengwei Guo Lu Li Quan Shan Zulai Li |
| author_sort | Chuanyong Li |
| collection | DOAJ |
| description | The effect of the distribution of the primary phase Si and TiB<sub>2</sub> particles in the hypereutectic Al-Si alloy was studied and found to be influenced by the cooling rate. Therefore, this article studies the effect of the cooling rate on the multi-phase structure of TiB<sub>2</sub> particles in Al-20Si using a wedge-shaped mold. The sizes, shapes, and distribution of primary phase Si and TiB<sub>2</sub> particles inside primary phase Si were observed through SEM. The effect of TiB<sub>2</sub> particles on cracks in primary phase Si was studied using nanoindentation technology, and the interface relationship between primary Si and TiB<sub>2</sub> was studied using TEM. Finally, based on the experimental results, the trapping mechanism of primary Si for TiB<sub>2</sub> particles is discussed. The results indicate that the faster the cooling rate, the finer and more uniform the size distribution of the primary Si phase in the structure. TiB<sub>2</sub> mostly exists as individual particles. Moreover, the pushing rate of the solid–liquid interface during solidification is faster, resulting in more TiB<sub>2</sub> particles being engulfed by the primary Si phase. |
| first_indexed | 2024-03-11T03:29:37Z |
| format | Article |
| id | doaj.art-0e9d9974c409410f98f528f105e91b7c |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T03:29:37Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-0e9d9974c409410f98f528f105e91b7c2023-11-18T02:27:53ZengMDPI AGMetals2075-47012023-05-0113593310.3390/met13050933Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si AlloyChuanyong Li0Xingguo Zhang1Zhengwei Guo2Lu Li3Quan Shan4Zulai Li5Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaThe effect of the distribution of the primary phase Si and TiB<sub>2</sub> particles in the hypereutectic Al-Si alloy was studied and found to be influenced by the cooling rate. Therefore, this article studies the effect of the cooling rate on the multi-phase structure of TiB<sub>2</sub> particles in Al-20Si using a wedge-shaped mold. The sizes, shapes, and distribution of primary phase Si and TiB<sub>2</sub> particles inside primary phase Si were observed through SEM. The effect of TiB<sub>2</sub> particles on cracks in primary phase Si was studied using nanoindentation technology, and the interface relationship between primary Si and TiB<sub>2</sub> was studied using TEM. Finally, based on the experimental results, the trapping mechanism of primary Si for TiB<sub>2</sub> particles is discussed. The results indicate that the faster the cooling rate, the finer and more uniform the size distribution of the primary Si phase in the structure. TiB<sub>2</sub> mostly exists as individual particles. Moreover, the pushing rate of the solid–liquid interface during solidification is faster, resulting in more TiB<sub>2</sub> particles being engulfed by the primary Si phase.https://www.mdpi.com/2075-4701/13/5/933hypereutectic Al-Si alloysTiB<sub>2</sub> particlesparticle distributioncrack extensionparticle engulfment |
| spellingShingle | Chuanyong Li Xingguo Zhang Zhengwei Guo Lu Li Quan Shan Zulai Li Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy Metals hypereutectic Al-Si alloys TiB<sub>2</sub> particles particle distribution crack extension particle engulfment |
| title | Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy |
| title_full | Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy |
| title_fullStr | Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy |
| title_full_unstemmed | Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy |
| title_short | Multi-Phase Structure Control and Interfacial Investigation of TiB<sub>2</sub>/Hypereutectic Al-Si Alloy |
| title_sort | multi phase structure control and interfacial investigation of tib sub 2 sub hypereutectic al si alloy |
| topic | hypereutectic Al-Si alloys TiB<sub>2</sub> particles particle distribution crack extension particle engulfment |
| url | https://www.mdpi.com/2075-4701/13/5/933 |
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