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Analysis of Metal Foaming Behaviour and Development of Foaming Processes

机译:金属发泡行为分析及发泡工艺发展

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The present paper highlights results from the priority program "Cellular Metals" of the Deutsche Forschungsgemeinschaft (DFG SPP 1075). Metal foams were made by foaming precursors containing a blowing agent. Two different manufacturing routes for precursors were analyzed and compared: hot-pressing of powders and thixocasting of cold-isostatically pressed powders. The foaming process was observed in-situ by X-ray imaging. Expansion kinetics, average pore sizes, drainage effects and pore morphologies were determined. The influence of gas atmosphere and overpressure on expansion and pore size was studied. Thixocasting parameters such as the pre-heating conditions of the slug, the cold-isostatic compaction pressure and TiH_2 content were optimized. Foam expansion and drainage of the optimized precursor were studied.
机译:本白皮书重点介绍了德国科学基金会(DFG SPP 1075)的优先项目“蜂窝金属”的结果。通过使含有发泡剂的前体发泡来制备金属泡沫。分析并比较了两种不同的前体生产路线:粉末的热压和冷等静压粉末的触变浇铸。通过X射线成像原位观察发泡过程。确定了膨胀动力学,平均孔径,排水效果和孔隙形态。研究了气体气氛和超压对膨胀和孔径的影响。优化了块料的预热条件,冷等静压压力和TiH_2含量等触变参数。研究了优化前体的泡沫膨胀和排水。

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