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Characterization of thermochemical properties of Al nanoparticle and NiO nanowire composites

机译:Al纳米颗粒和NiO纳米线复合材料的热化学性质表征

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摘要

Thermochemical properties and microstructures of the composite of Al nanoparticles and NiO nanowires were characterized. The nanowires were synthesized using a hydrothermal method and were mixed with these nanoparticles by sonication. Electron microscopic images of these composites showed dispersed NiO nanowires decorated with Al nanoparticles. Thermal analysis suggests the influence of NiO mass ratio was insignificant with regard to the onset temperature of the observed thermite reaction, although energy release values changed dramatically with varying NiO ratios. Reaction products from the fuel-rich composites were found to include elemental Al and Ni, Al2O3, and AlNi. The production of the AlNi phase, confirmed by an ab initio molecular dynamics simulation, was associated with the formation of some metallic liquid spheres from the thermite reaction.
机译:表征了Al纳米颗粒和NiO纳米线复合材料的热化学性质和微观结构。使用水热法合成纳米线,并通过超声处理将其与这些纳米粒子混合。这些复合材料的电子显微图像显示分散有Al纳米粒子的NiO纳米线。热分析表明,尽管随着NiO比例的变化能量释放值发生了显着变化,但NiO质量比对观察到的铝热反应开始温度的影响并不明显。发现富含燃料的复合材料的反应产物包括元素Al和Ni,Al2O3和AlNi。从头算分子动力学模拟证实,AlNi相的产生与铝热剂反应形成的一些金属液体球有关。

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