Nanothermites have been employed as fuel additives in energetic formulations due to their higher energy density over CHNO energetics. Nevertheless, sintering and degradation of nanoparticles significantly limit the practical use of nanothermites. In this work, combustion characteristic and aging behavior of aluminum/iron oxide (Al/Fe₂O₃) nanothermite mixtures were investigated in the presence of micron-scale nickel aimed to produce bimetal thermite powders. The results showed that the alumina content in the combustion residue increased from 88.3% for Al/Fe₂O₃ nanothermite to 96.5% for the nanothermite mixture containing 20 wt% nickel. Finer particle sizes of combustion residue were obtained for the nanothermite mixtures containing nickel, indicative of the reduced agglomeration. Both results suggested a more complete combustion in the bimetal thermite powders. Aging behavior of the nanothermite mixture was also assessed by measuring the heat of combustion of the mixture before and after aging process. The reduction in heat of combustion of nanothermite mixtures containing nickel was less severe as compared to a significant decrease for the nanothermite mixture without nickel, indicating better aging resistance of the bimetal thermite powders.

由于其比CHNO高能级更高的能量密度，因此，纳米热敏胺已被用作高能配方中的燃料添加剂。然而，纳米粒子的烧结和降解显着限制了纳米温度计的实际使用。在这项工作中，研究了铝/氧化铁（Al / Fe ₂ O ₃）纳米铝铁矿混合物在微米级镍存在下的燃烧特性和老化行为，旨在生产双金属铝铁矿粉。结果表明，Al / Fe ₂ O ₃燃烧残渣中的氧化铝含量从88.3％增加含20wt％镍的纳米热矿混合物中，纳米热矿为96.5％。对于含镍的纳米热矿混合物，燃烧残留物的粒度更细，表明团聚减少。两项结果均表明双金属铝热剂粉末燃烧更完全。还通过测量老化过程之前和之后混合物的燃烧热来评估纳米铝热剂混合物的老化行为。与不含镍的纳米热土混合物的显着降低相比，含镍的纳米热土混合物的燃烧热的降低没有那么严重，表明双金属铝热剂粉末具有更好的耐老化性。