一种新型铝合金的制备及其水反应性能研究

为解决现有水冲压发动机启动困难、金属燃料难于储存等问题，通过熔炼法制备一种新型铝铟镁三相合金。运用水反应测试装置、高压热分析天平、金相显微镜等测试手段，分析合金常温及高温下的水反应性能、表面形貌和活化机理。结果表明：该铝合金具有良好的储藏性能，在常温下单位质量的合金与水反应的产氢量仅为0.029 mL/mg；高温下铝合金与水蒸气反应分为4个阶段，在450℃前完成低温区反应，启动迅速。该合金能够代替现有普通铝粉和纳米铝粉，作为水冲压发动机主燃料使用。

Synthesis of new Al-based alloys and their reaction with water

In order to start metal/water ramjet, activate aluminum and its reaction with water, and improve the storage property at room temperature, a new type of aluminum alloy was prepared by melting method. Making use of water reaction test device, high pressure thermal analysis system and metallographic microscope, both surface morphology and activation mechanism of the alloy at different temperature were studied. The results show that the aluminum alloy has good storage performance, and produce only 0.029 mL/mg hydrogen at room temperature. The reaction of Al-In-Mg alloy and water vapor is divided into 4 stages, and first two stages can be finished before 450 . This new alloy can be used to replace the ordinary aluminum powder and fine powder in the water pressing engine.