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- Title
Oxidation and Combustion Reaction Characteristics of Al-Li Alloy.
- Authors
XIE Xiao; ZHANG Yan; CHEN Chao; LIU He-xin; Yl Jian-hua; ZHAO Feng-q1; CHEN Su-hang
- Abstract
To better understand the reactivity of aluminum-lithium alloyCAl-Li), the oxidation reaction characteristics and kinetic parameters of aluminum-lithium alloys were analyzed by using TC-DSC. The combustion process and the combustion products were analyzed by using a self-designed combustion test device, SEM, XRD, and other equipments. The effects of different oxidizers on the reactivity of the alloys were also compared. Meanwhile, the apparent activation energy of the alloys reaction in air and oxygen were calculated by using the Kissinger, Ozawa, and Friedman methods. The results show that the oxidation of aluminum-lithium alloys occurrs in three stages: the first stage from the beginning up to 800K, the second stage at 800-- 1 100K, and the third stage is above 1 100K. Compared to ammonium perchlorat(AP), polytetrafluoroethylene (PTFE) can better promote the aluminum-lithium alloys reaction. When the AI-Li/PTFE is heated in air, a vigorous oxidation process is immediately observed after aluminum melt. When the AI-Li/PTFE is combusted in air, a larger gas-phase flame and more intense combustion process compared to Al-Li/AP exhibited. The aluminum in the alloy exhibited higher combustion efficiency, leading to more complete reactions. The the apparent activation energies of the alloy calculated by Kissinger method was 335.9 kj/mol (in air) and 351.3kJ/mol (in oxygen), while the Ozawa method calculated the apparent activation energies of the alloy as 339.9kJ/mol (in air) and 354.6kJ/mol (in oxygen). The apparent activation energies calculated by Friedman method were 343. 1 kj/mol (in air) and 355. 4kJ/mol (in oxygen), respectively.
- Subjects
PHYSICAL &; theoretical chemistry; COMBUSTION efficiency; ACTIVATION energy; ALUMINUM alloys; COMBUSTION products
- Publication
Chinese Journal of Explosives & Propellants, 2024, Vol 47, Issue 7, p614
- ISSN
1007-7812
- Publication type
Article
- DOI
10.14077/j.issn.1007-7812.2023169012