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首页> 外文会议>International Conference on Solidification and Gravity; 20040906-09; Miskolc-Lillafured(HU) >Liquid-Metal Foams - Feasible In-situ Experiments under Low Gravity
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Liquid-Metal Foams - Feasible In-situ Experiments under Low Gravity

机译：液态金属泡沫-低重力下的可行的原位实验

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摘要

Metal foams are quite a challenge to materials scientists due to their difficult manufacturing. In all processes the foam develops in the liquid or semiliquid state. Liquid-metal foams are complex fluids which contain liquid metals, solid particles and gas bubbles at the same time. An X-ray transparent furnace was developed to monitor liquid metal foam evolution. Aluminium foams - similar to the commercial Metcomb~® foams - were produced by feeding argon or air gas bubbles into an aluminium composite melt. The foam evolution was observed in-situ by X-ray radioscopy under normal gravity. Drainage and rupture were evaluated during the 5 min foam decay and 2 min solidification. Argon blown foams showed significant drainage and cell wall rupture during the first 20 s of foam decay. Air blown foams were stable and neither drainage nor rupture occurred. We demonstrated the feasibility of experiments during parabolic flight or drop tower campaigns. However, the development of a foam generator for low gravity is needed.
机译：金属泡沫由于制造困难而对材料科学家构成了很大的挑战。在所有过程中，泡沫均呈液态或半液态。液态金属泡沫是复杂的流体，同时包含液态金属，固体颗粒和气泡。开发了X射线透明熔炉来监控液态金属泡沫的演变。铝泡沫-与商业Metcomb〜®泡沫类似，是通过将氩气或气泡送入铝复合熔体来生产的。在正常重力下通过X射线射线照相术原位观察到泡沫的演化。在5分钟的泡沫衰减和2分钟的凝固过程中评估了排水和破裂。在泡沫衰减的前20 s中，氩吹泡沫显示出明显的排水性和细胞壁破裂。吹气泡沫稳定，既没有排水也没有破裂。我们证明了抛物线飞行或下降塔战役期间进行实验的可行性。然而，需要开发用于低重力的泡沫发生器。

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