Al/Ni反应性多层复合膜的燃烧速率实验及计算模型
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摘要
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。
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.
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.
引文
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[8]王亮,何碧,蒋小华,等.Al/Ti反应多层膜中反应区传播速度的理论计算[J].火工品,2009(2):1-4.
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[12]Xu R G,Falk M L,Weihs T P.Interdiffusion of Ni-Al multilayers:a continuum and molecular dynamics study[J].Journal of Applied Physics,2013,114(16):163 511-163511-7.
[2]Kuk S W,Ryu H J,Yu J.Effects of the Al/Ni ratio on the reactions in the compression-bonded Ni-sputtered Al foil multi-layer[J].Journal of Alloys and Compounds,2014(589):455-461.
[3]Morris C J,Mary B,Zakar E,et al.Rapid initiation of reactions in Al/Ni multilayers with nanoscale layering[J].Journal of Physics&Chemistry of Solids,2010,71(2):84-89.
[4]王涛,曾庆轩,李明愉,等.Al/Ni反应多层膜的电爆炸及驱动性能研究[J].火工品,2016(5):1-5.
[5]ARMSTRONG,ROBERT.Models for gasless combustion in layered materials and random media[J].Combustion Science and Technology,1990,71(4-6):155-174.
[6]Mann A B,Gavens A J,Reiss M E,et al.Modeling and characteri-zing the propagation velocity of exothermic reactions in multi-layer foils[J].Journal of Applied Physics,1997,82(3):1 178-1 188.
[7]Besnoin E,Cerutti S,Knio O M,et al.Effect of reactant and product melting on self-propagating reactions in multilayer foils[J].Journal of Applied Physics,2002,92(9):5 474-5 481.
[8]王亮,何碧,蒋小华,等.Al/Ti反应多层膜中反应区传播速度的理论计算[J].火工品,2009(2):1-4.
[9]王涛.Al/Ni纳米多层复合薄膜的制备及性能研究[D].北京:北京理工大学,2016.
[10]Rogachev A S.Exothermic reaction waves in multilayer nanofilms[J].Russian Chemical Reviews,2008,77(1):22-38.
[11]Barmak K,Michaelsen C,Lucadamo R B G.Reactive phase formation in sputter-deposited Ni/Al thin films[J].Mrs Proceedings,1995,382(1):133-146.
[12]Xu R G,Falk M L,Weihs T P.Interdiffusion of Ni-Al multilayers:a continuum and molecular dynamics study[J].Journal of Applied Physics,2013,114(16):163 511-163511-7.