The Oxidation Process and Methods for Improving Reactivity of Al
Aluminum (Al) has been widely used in micro-electromechanical systems (MEMS), polymer bonded explosives (PBXs) and solid propellants. Its typical core-shell structure (the inside active Al core and the external alumina (Al<sub>2</sub>O<sub>3</sub>) shell) determines its oxida...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-08-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/12/9/1187 |
| _version_ | 1797489708994920448 |
|---|---|
| author | Deqi Wang Guozhen Xu Tianyu Tan Shishuo Liu Wei Dong Fengsheng Li Jie Liu |
| author_facet | Deqi Wang Guozhen Xu Tianyu Tan Shishuo Liu Wei Dong Fengsheng Li Jie Liu |
| author_sort | Deqi Wang |
| collection | DOAJ |
| description | Aluminum (Al) has been widely used in micro-electromechanical systems (MEMS), polymer bonded explosives (PBXs) and solid propellants. Its typical core-shell structure (the inside active Al core and the external alumina (Al<sub>2</sub>O<sub>3</sub>) shell) determines its oxidation process, which is mainly influenced by oxidant diffusion, Al<sub>2</sub>O<sub>3</sub> crystal transformation and melt-dispersion of the inside active Al. Consequently, the properties of Al can be controlled by changing these factors. Metastable intermixed composites (MICs), flake Al and nano Al can improve the properties of Al by increasing the diffusion efficiency of the oxidant. Fluorine, Titanium carbide (TiC), and alloy can crack the Al<sub>2</sub>O<sub>3</sub> shell to improve the properties of Al. Furthermore, those materials with good thermal conductivity can increase the heat transferred to the internal active Al, which can also improve the reactivity of Al. Now, the integration of different modification methods is employed to further improve the properties of Al. With the ever-increasing demands on the performance of MEMS, PBXs and solid propellants, Al-based composite materials with high stability during storage and transportation, and high reactivity for usage will become a new research focus in the future. |
| first_indexed | 2024-03-10T00:20:31Z |
| format | Article |
| id | doaj.art-193290e144ff478ab64e63f57ea8d2aa |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T00:20:31Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-193290e144ff478ab64e63f57ea8d2aa2023-11-23T15:42:48ZengMDPI AGCrystals2073-43522022-08-01129118710.3390/cryst12091187The Oxidation Process and Methods for Improving Reactivity of AlDeqi Wang0Guozhen Xu1Tianyu Tan2Shishuo Liu3Wei Dong4Fengsheng Li5Jie Liu6National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaNational Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaAluminum (Al) has been widely used in micro-electromechanical systems (MEMS), polymer bonded explosives (PBXs) and solid propellants. Its typical core-shell structure (the inside active Al core and the external alumina (Al<sub>2</sub>O<sub>3</sub>) shell) determines its oxidation process, which is mainly influenced by oxidant diffusion, Al<sub>2</sub>O<sub>3</sub> crystal transformation and melt-dispersion of the inside active Al. Consequently, the properties of Al can be controlled by changing these factors. Metastable intermixed composites (MICs), flake Al and nano Al can improve the properties of Al by increasing the diffusion efficiency of the oxidant. Fluorine, Titanium carbide (TiC), and alloy can crack the Al<sub>2</sub>O<sub>3</sub> shell to improve the properties of Al. Furthermore, those materials with good thermal conductivity can increase the heat transferred to the internal active Al, which can also improve the reactivity of Al. Now, the integration of different modification methods is employed to further improve the properties of Al. With the ever-increasing demands on the performance of MEMS, PBXs and solid propellants, Al-based composite materials with high stability during storage and transportation, and high reactivity for usage will become a new research focus in the future.https://www.mdpi.com/2073-4352/12/9/1187aluminumoxidation processreaction mechanismmodification methoddevelopment trend |
| spellingShingle | Deqi Wang Guozhen Xu Tianyu Tan Shishuo Liu Wei Dong Fengsheng Li Jie Liu The Oxidation Process and Methods for Improving Reactivity of Al Crystals aluminum oxidation process reaction mechanism modification method development trend |
| title | The Oxidation Process and Methods for Improving Reactivity of Al |
| title_full | The Oxidation Process and Methods for Improving Reactivity of Al |
| title_fullStr | The Oxidation Process and Methods for Improving Reactivity of Al |
| title_full_unstemmed | The Oxidation Process and Methods for Improving Reactivity of Al |
| title_short | The Oxidation Process and Methods for Improving Reactivity of Al |
| title_sort | oxidation process and methods for improving reactivity of al |
| topic | aluminum oxidation process reaction mechanism modification method development trend |
| url | https://www.mdpi.com/2073-4352/12/9/1187 |
| work_keys_str_mv | AT deqiwang theoxidationprocessandmethodsforimprovingreactivityofal AT guozhenxu theoxidationprocessandmethodsforimprovingreactivityofal AT tianyutan theoxidationprocessandmethodsforimprovingreactivityofal AT shishuoliu theoxidationprocessandmethodsforimprovingreactivityofal AT weidong theoxidationprocessandmethodsforimprovingreactivityofal AT fengshengli theoxidationprocessandmethodsforimprovingreactivityofal AT jieliu theoxidationprocessandmethodsforimprovingreactivityofal AT deqiwang oxidationprocessandmethodsforimprovingreactivityofal AT guozhenxu oxidationprocessandmethodsforimprovingreactivityofal AT tianyutan oxidationprocessandmethodsforimprovingreactivityofal AT shishuoliu oxidationprocessandmethodsforimprovingreactivityofal AT weidong oxidationprocessandmethodsforimprovingreactivityofal AT fengshengli oxidationprocessandmethodsforimprovingreactivityofal AT jieliu oxidationprocessandmethodsforimprovingreactivityofal |