TY - JOUR
T1 - Promising fuels for energetics
T2 - Spherical Al-Li powders with high reactivity via incorporation of Li
AU - Zhu, Yanli
AU - Le, Wei
AU - Zhao, Wanjun
AU - Ma, Xiaohang
AU - Liu, Dazhi
AU - Li, Jianxin
AU - Jiao, Qingjie
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9/1
Y1 - 2022/9/1
N2 - To improve the heat release and reactivity of Al, Li was incorporated into Al via the centrifugal atomization in this study for obtaining Al-Li alloy powders. The microstructure and composition of the samples were characterized by SEM, XRD, and ICP. The oxidation kinetics were evaluated via TG/DSC, and the energetic performance of the Al-Li/KP composites was tested. The results show that spherical Al-Li alloy powders with the well-distributed dendritic structure are obtained that are mainly composed of αAl and Al-Li compounds. The oxidization rate of Al-Li alloy powders is higher than pure Al, owing to the decreasing activation energy caused by the catalysis of the soluble Li in Al and Al-Li compounds. The shorter ignition delay and higher reaction rate of Al-Li/KP with increasing Li content in Al-Li alloy powders is a result of the microexplosion of Al-Li. Therefore, Al-Li alloy powders with high reactivity are promising fuels for energetic materials.
AB - To improve the heat release and reactivity of Al, Li was incorporated into Al via the centrifugal atomization in this study for obtaining Al-Li alloy powders. The microstructure and composition of the samples were characterized by SEM, XRD, and ICP. The oxidation kinetics were evaluated via TG/DSC, and the energetic performance of the Al-Li/KP composites was tested. The results show that spherical Al-Li alloy powders with the well-distributed dendritic structure are obtained that are mainly composed of αAl and Al-Li compounds. The oxidization rate of Al-Li alloy powders is higher than pure Al, owing to the decreasing activation energy caused by the catalysis of the soluble Li in Al and Al-Li compounds. The shorter ignition delay and higher reaction rate of Al-Li/KP with increasing Li content in Al-Li alloy powders is a result of the microexplosion of Al-Li. Therefore, Al-Li alloy powders with high reactivity are promising fuels for energetic materials.
KW - Centrifugal atomization
KW - Energetic application
KW - Microexplosion
KW - Spherical Al-Li alloy
KW - Thermal behavior
UR - http://www.scopus.com/inward/record.url?scp=85129322744&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2022.124393
DO - 10.1016/j.fuel.2022.124393
M3 - Article
AN - SCOPUS:85129322744
SN - 0016-2361
VL - 323
JO - Fuel
JF - Fuel
M1 - 124393
ER -