Al/Ni反应性多层复合膜的燃烧速率实验及计算模型

采用改进的Mann模型,计算了Al/Ni比例(1∶1,1.5∶1,3∶1)、预混层厚度、反应初始温度对复合膜燃烧速率的影响。通过磁控溅射法制备了相同比例的Al/Ni复合膜,测量了其燃烧反应速度。结果表明:随着Al含量的增加,复合膜燃烧速率减小;存在一个临界厚度,在临界厚度点复合膜燃烧速率最大。且当调制周期小于临界值时,燃烧速率与调制周期成正比,而当调制周期大于临界厚度时,复合膜燃烧速率与调制周期成反比;随着反应初始温度增高,Al/Ni反应性多层复合膜的燃烧速率增大。实验结果验证了模型的有效性。

Burning Rate Experiment and Calculation Model of Al/Ni Reactive Multilayer Foils

By use of the improved Mann model, the effects of the ratio of Al to Ni (1:1, 1.5:1, 3:1), the thickness of the premixed layer and the initial temperature were discussed. Meanwhile, the Al/Ni composite membranes with same ratio were prepared by magnetron sputtering, as well as the combustion rate was tested. The results show that the combustion rate of the Al/Ni reactive multilayer foils decreases with the increase of Al content. There is a critical thickness at which the composite membrane burns at its maximum rate. When the modulation period is less than the critical value, the burning rate is proportional to the modulation period, while it is inversely proportional to the modulation period as the modulation period increasing. The burning rate increases with the initial temperature of the reaction increasing. The experimental results verify the validity of the improved Mann model.