Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints
Combining Mg and Al dissimilar metals further reduces structural weight, but the formation of intermetallic compounds (IMCs) affects Al/Mg joint properties. To prevent IMCs, a Ni-Al2O3 composite coating was pre-plated on the Mg alloy substrate, and then Sn3.0Ag0.5Cu (SAC 305) solder was utilized to...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-04-01
|
| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724002196 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850195479941349376 |
|---|---|
| author | Yingzong Liu Yuanxing Li Jinzhe Cui Zongtao Zhu Hui Chen |
| author_facet | Yingzong Liu Yuanxing Li Jinzhe Cui Zongtao Zhu Hui Chen |
| author_sort | Yingzong Liu |
| collection | DOAJ |
| description | Combining Mg and Al dissimilar metals further reduces structural weight, but the formation of intermetallic compounds (IMCs) affects Al/Mg joint properties. To prevent IMCs, a Ni-Al2O3 composite coating was pre-plated on the Mg alloy substrate, and then Sn3.0Ag0.5Cu (SAC 305) solder was utilized to facilitate the joining of AZ31 Mg/6061 Al through ultrasonic-assisted soldering. We investigated the impact of Al2O3 nano sol content in the coating on microstructure evolution, IMCs formation, and mechanical properties. Results indicated that the Ni-Al2O3 composite coating effectively suppressed the Mg-Sn reaction, thereby preventing the formation of Mg2Sn IMC and significantly enhancing joint strength. In joints with a Ni-Al2O3 composite coating containing 50 mL/L Al2O3 nano sol, no Mg2Sn IMC was detected after 50 min of holding at 260 °C, achieving a maximum shear strength of approximately 67.2 MPa. Increasing the Al2O3 concentration further expanded the soldering process window. For the joint with Ni-Al2O3 (100 mL/L Al2O3 nano sol) composite coating held at 260 °C for 70 min, the coating was dissolved to a thickness of about 5.8 µm, but no Mg2Sn IMC was observed. The Ni-based solid solution formed near the coating/solder interface was strengthened, leading to fractures occurring within the SAC solder, and the maximum shear strength further increased to 73.9 MPa. The strengthening mechanism of the joints facilitated by using the Ni-Al2O3 composite coating was revealed by comparing with pure Ni-assisted joints. Therefore, employing a Ni-Al2O3 composite coating as a barrier layer represents a promising strategy for inhibiting IMC formation during the joining of dissimilar metals. |
| format | Article |
| id | doaj-art-4659d1623f984e44b39ec43d706eaab4 |
| institution | OA Journals |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-4659d1623f984e44b39ec43d706eaab42025-08-20T02:13:44ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-04-011341784179810.1016/j.jma.2024.06.025Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered jointsYingzong Liu0Yuanxing Li1Jinzhe Cui2Zongtao Zhu3Hui Chen4Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, PR ChinaCorresponding author.; Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, PR ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, PR ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, PR ChinaKey Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, PR ChinaCombining Mg and Al dissimilar metals further reduces structural weight, but the formation of intermetallic compounds (IMCs) affects Al/Mg joint properties. To prevent IMCs, a Ni-Al2O3 composite coating was pre-plated on the Mg alloy substrate, and then Sn3.0Ag0.5Cu (SAC 305) solder was utilized to facilitate the joining of AZ31 Mg/6061 Al through ultrasonic-assisted soldering. We investigated the impact of Al2O3 nano sol content in the coating on microstructure evolution, IMCs formation, and mechanical properties. Results indicated that the Ni-Al2O3 composite coating effectively suppressed the Mg-Sn reaction, thereby preventing the formation of Mg2Sn IMC and significantly enhancing joint strength. In joints with a Ni-Al2O3 composite coating containing 50 mL/L Al2O3 nano sol, no Mg2Sn IMC was detected after 50 min of holding at 260 °C, achieving a maximum shear strength of approximately 67.2 MPa. Increasing the Al2O3 concentration further expanded the soldering process window. For the joint with Ni-Al2O3 (100 mL/L Al2O3 nano sol) composite coating held at 260 °C for 70 min, the coating was dissolved to a thickness of about 5.8 µm, but no Mg2Sn IMC was observed. The Ni-based solid solution formed near the coating/solder interface was strengthened, leading to fractures occurring within the SAC solder, and the maximum shear strength further increased to 73.9 MPa. The strengthening mechanism of the joints facilitated by using the Ni-Al2O3 composite coating was revealed by comparing with pure Ni-assisted joints. Therefore, employing a Ni-Al2O3 composite coating as a barrier layer represents a promising strategy for inhibiting IMC formation during the joining of dissimilar metals.http://www.sciencedirect.com/science/article/pii/S2213956724002196Ni-Al2O3 composite coatingUltrasonic-assisted solderingMg2Sn IMCShear strength |
| spellingShingle | Yingzong Liu Yuanxing Li Jinzhe Cui Zongtao Zhu Hui Chen Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints Journal of Magnesium and Alloys Ni-Al2O3 composite coating Ultrasonic-assisted soldering Mg2Sn IMC Shear strength |
| title | Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints |
| title_full | Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints |
| title_fullStr | Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints |
| title_full_unstemmed | Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints |
| title_short | Effect of Al2O3 nano sol content in Ni-Al2O3 composite coating on intermetallic compound formation and properties of Mg/Al soldered joints |
| title_sort | effect of al2o3 nano sol content in ni al2o3 composite coating on intermetallic compound formation and properties of mg al soldered joints |
| topic | Ni-Al2O3 composite coating Ultrasonic-assisted soldering Mg2Sn IMC Shear strength |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724002196 |
| work_keys_str_mv | AT yingzongliu effectofal2o3nanosolcontentinnial2o3compositecoatingonintermetalliccompoundformationandpropertiesofmgalsolderedjoints AT yuanxingli effectofal2o3nanosolcontentinnial2o3compositecoatingonintermetalliccompoundformationandpropertiesofmgalsolderedjoints AT jinzhecui effectofal2o3nanosolcontentinnial2o3compositecoatingonintermetalliccompoundformationandpropertiesofmgalsolderedjoints AT zongtaozhu effectofal2o3nanosolcontentinnial2o3compositecoatingonintermetalliccompoundformationandpropertiesofmgalsolderedjoints AT huichen effectofal2o3nanosolcontentinnial2o3compositecoatingonintermetalliccompoundformationandpropertiesofmgalsolderedjoints |