Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing
A novel annealing process of controlled heating rate is used to produce severe cold-formed aluminum plates, which are processed into aluminum foil and mainly used for high-voltage electrolytic capacitor anodes. The experiment in this study focused on various aspects such as microstructure, recrystal...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-06-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/11/4128 |
| _version_ | 1797597182159749120 |
|---|---|
| author | Yunlei Wang Taibin Wu Luchang Che Guangjie Huang |
| author_facet | Yunlei Wang Taibin Wu Luchang Che Guangjie Huang |
| author_sort | Yunlei Wang |
| collection | DOAJ |
| description | A novel annealing process of controlled heating rate is used to produce severe cold-formed aluminum plates, which are processed into aluminum foil and mainly used for high-voltage electrolytic capacitor anodes. The experiment in this study focused on various aspects such as microstructure, recrystallization behavior, grain size, and grain boundary characteristics. The results revealed a comprehensive influence of cold-rolled reduction rate, annealing temperature, and heating rate on recrystallization behavior and grain boundary characteristics during the annealing process. The heating rate applied plays a crucial role in controlling the recrystallization process and the subsequent grain growth, which ultimately determines whether or not the grains will become larger. In addition, as the annealing temperature rises, the recrystallized fraction increases and the grains size decreases; conversely, the recrystallized fraction decreases as the heating rate increases. When the annealing temperature remains constant, the recrystallization fraction increases with a greater deformation degree. Once complete recrystallization occurs, the grain will undergo secondary growth and may even subsequently become coarser. If the deformation degree and annealing temperature remain constant, the increased heating rate will result in a lower recrystallization fraction. This is due to the inhibition of recrystallization, and most of the aluminum sheet even remains in a deformed state before recrystallization. This kind of microstructure evolution, grain characteristic revelation, and recrystallization behavior regulation can provide effective help for enterprise engineers and technicians to guide the production of capacitor aluminum foil to a certain extent, so as to improve the quality of aluminum foil and increase the electric storage performance. |
| first_indexed | 2024-03-11T03:03:09Z |
| format | Article |
| id | doaj.art-f6d8f3b3d53b4520a327df5198cfcdcf |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:03:09Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f6d8f3b3d53b4520a327df5198cfcdcf2023-11-18T08:10:40ZengMDPI AGMaterials1996-19442023-06-011611412810.3390/ma16114128Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and AnnealingYunlei Wang0Taibin Wu1Luchang Che2Guangjie Huang3College of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaCollege of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaDepartment of Advanced Materials and Technology, China Ordnance Industry 59th Research Institute, Chongqing 400039, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaA novel annealing process of controlled heating rate is used to produce severe cold-formed aluminum plates, which are processed into aluminum foil and mainly used for high-voltage electrolytic capacitor anodes. The experiment in this study focused on various aspects such as microstructure, recrystallization behavior, grain size, and grain boundary characteristics. The results revealed a comprehensive influence of cold-rolled reduction rate, annealing temperature, and heating rate on recrystallization behavior and grain boundary characteristics during the annealing process. The heating rate applied plays a crucial role in controlling the recrystallization process and the subsequent grain growth, which ultimately determines whether or not the grains will become larger. In addition, as the annealing temperature rises, the recrystallized fraction increases and the grains size decreases; conversely, the recrystallized fraction decreases as the heating rate increases. When the annealing temperature remains constant, the recrystallization fraction increases with a greater deformation degree. Once complete recrystallization occurs, the grain will undergo secondary growth and may even subsequently become coarser. If the deformation degree and annealing temperature remain constant, the increased heating rate will result in a lower recrystallization fraction. This is due to the inhibition of recrystallization, and most of the aluminum sheet even remains in a deformed state before recrystallization. This kind of microstructure evolution, grain characteristic revelation, and recrystallization behavior regulation can provide effective help for enterprise engineers and technicians to guide the production of capacitor aluminum foil to a certain extent, so as to improve the quality of aluminum foil and increase the electric storage performance.https://www.mdpi.com/1996-1944/16/11/4128electrolytic capacitoraluminum foilmicrostructurerecrystallization |
| spellingShingle | Yunlei Wang Taibin Wu Luchang Che Guangjie Huang Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing Materials electrolytic capacitor aluminum foil microstructure recrystallization |
| title | Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing |
| title_full | Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing |
| title_fullStr | Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing |
| title_full_unstemmed | Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing |
| title_short | Microstructure and Recrystallization Behavior of Heating Rate-Controlled Electrolytic Capacitor Aluminum Foil under Cold Forming and Annealing |
| title_sort | microstructure and recrystallization behavior of heating rate controlled electrolytic capacitor aluminum foil under cold forming and annealing |
| topic | electrolytic capacitor aluminum foil microstructure recrystallization |
| url | https://www.mdpi.com/1996-1944/16/11/4128 |
| work_keys_str_mv | AT yunleiwang microstructureandrecrystallizationbehaviorofheatingratecontrolledelectrolyticcapacitoraluminumfoilundercoldformingandannealing AT taibinwu microstructureandrecrystallizationbehaviorofheatingratecontrolledelectrolyticcapacitoraluminumfoilundercoldformingandannealing AT luchangche microstructureandrecrystallizationbehaviorofheatingratecontrolledelectrolyticcapacitoraluminumfoilundercoldformingandannealing AT guangjiehuang microstructureandrecrystallizationbehaviorofheatingratecontrolledelectrolyticcapacitoraluminumfoilundercoldformingandannealing |