Abstract
To investigate the influence of cerium trifluoride (CeF3) on the combustion performance of nano aluminum powder (n-Al), different mass fractions of CeF3 were physically mixed into the n-Al powder. Research results show that CeF3 can significantly increase the main exothermic heat of n-Al powder. When the CeF3 content was 10 %, the heat release reached 9579.90 J·g‒1. However, as the CeF3 content increased, the heat release of the sample decreased. Thermal analysis results of Al/CeF3 and Al/CeO2 infer that this was due to the action of CeO2 generated by pre-ignition reaction for Al/CeF3–15. The presence of CeO2 inhibited the reaction degree of Al, thereby reducing the heat release. Meanwhile, as the proportion of CeF3 increased, the peak temperature of the main reaction exothermic peak was delayed, and more energy input was required for the oxidation of n-Al powder. Combustion experiments show that the addition of CeF3 greatly shortened the combustion time of n-Al powder, with the shortest time being 4.43 s. In addition, due to the excellent storage and release oxygen capability of CeO2, multiple micro-explosions occurred in the composite material during combustion.
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