Characterization of Aluminum Nanopowder Compositions
Characterization of Aluminum Nanopowder Compositions
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DOI：
10.1002/1521-4087(200209)27:4
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发表时间：
2002-09
期刊：
影响因子：
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通讯作者：
Q. Kwok;R. Fouchard;A. Turcotte;P. Lightfoot;Richard Bowes;David E. G. Jones
中科院分区：
文献类型：
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作者：
Q. Kwok;R. Fouchard;A. Turcotte;P. Lightfoot;Richard Bowes;David E. G. Jones
采用DSC、同步TG-DTA和加速量热法（ARC）研究了两种不同的纳米Al粉末和一种微米级Al粉末的热行为。结果表明：随着晶粒尺寸的减小，铝粉的反应性提高；采用ARC和TG-DTA分别测定了小尺寸纳米Al粉在水中和潮湿环境中的热稳定性。采用原子吸收光谱法（AAS）、x射线光电子能谱法（XPS）和俄歇电子能谱法（AES）对Alex的表面化学进行了表征。采用TG-DTA-FTIR-MS研究了RDX与各种Al粉末混合物的放气行为。观察了纳米Al粉末与RDX化学反应中NO2和N2O的演化过程。采用ARC法测定了al和Alex对TNT、RDX、Comp B和AP热稳定性的影响。al的加入显著降低了TNT和RDX分解的起始温度。测定了纳米Al粉体及其与TNT、Comp B、RDX和AP混合后的静电放电灵敏度。结果表明，AP/ al混合物对静电放电非常敏感。标准粉尘爆炸试验表明亚历克斯是高度易爆的。
The thermal behaviour of two different Al nanopowders and a micron-sized Al powder was studied using DSC, simultaneous TG-DTA, and accelerating rate calorimetry (ARC). The results show that the reactivity of Al powder increases as the particle size decreases. The thermal stability of the smaller Al nanopowder (Als) in water and in a humid atmosphere was determined using ARC and TG-DTA, respectively. Atomic Absorption Spectrometry (AAS), X-Ray Photoelectron Spectrometry (XPS) and Auger Electron Spectrometry (AES) were used to characterize the surface chemistry of Alex. The outgassing behaviour for mixtures of RDX and the various Al powders was investigated using TG-DTA-FTIR-MS. Evolution of NO2 and N2O from a chemical interaction between Al nanopowders and RDX was observed. The effect of Als and Alex on the thermal stability of TNT, RDX, Comp B, and AP was determined using ARC. Addition of Als significantly lowered the onset temperature for TNT and RDX decomposition. Electrostatic discharge (ESD) sensitivities of Al nanopowders and their mixtures with TNT, Comp B, RDX and AP were determined. The results show that the AP/Als mixture is very sensitive to ESD. Standard dust explosibility tests demonstrated that Alex is highly explosible.