Institute of Applied Materials, Helmholtz Centre Berlin for Materials and Energy, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
Soft Matter. 2014 Jul 14;10(26):4711-6. doi: 10.1039/c4sm00487f.
The present study is based on the idea of understanding the rupture of films in metal foams by studying free standing metallic films as a model system. Liquid dynamics, the velocity of the rupturing material as well as the behaviour of ceramic particles inside the melt were analysed optically ex situ and by synchrotron X-ray radiography in situ. It was found that the resistance of films to rupture is mainly based on the interaction between solid particles and an immobile oxide skin, the formation of which depends on the oxygen content of the surrounding atmosphere and the presence of magnesium.
本研究的思路是通过研究自由支撑的金属薄膜作为模型体系来理解金属泡沫中的薄膜破裂。通过在体外进行光学分析和在体内利用同步加速器 X 射线射线照相术，对液体动力学、破裂材料的速度以及熔体内部陶瓷颗粒的行为进行了分析。结果发现，薄膜抗破裂的能力主要取决于固体颗粒与不活动的氧化皮之间的相互作用，而氧化皮的形成取决于周围气氛中的氧含量和镁的存在。
