A novel hot-pressing method to prepare foamable precursor of aluminum foam sandwich (AFS)
A novel hot-pressing method to prepare foamable precursor of aluminum foam sandwich (AFS)
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DOI：
10.1016/j.matlet.2019.126895
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发表时间：
2020-01
影响因子：
3
通讯作者：
Xiangyu Ding;Yuan Liu;Tan Wan
中科院分区：
文献类型：
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作者：
Xiangyu Ding;Yuan Liu;Tan Wan
为了缩短和简化泡沫铝夹层发泡前驱体的制备工艺，提出了一种用热压法制备泡沫铝夹层发泡前驱体的新方法。通过在铝盒上施加压力，可以获得具有更致密核心层的可发泡前驱体，该铝盒是将核心层粉末放置在法兰铝板上并用其他法兰板封住粉末形成的。结果表明，最佳制备条件为：冷压+热压相结合，压力均为300Mpa，每个压力段保温2 。为了降低设备成本，可以将压力降低到100Mpa，但在此压力下，由于芯层密度较低，发泡前驱体的法兰区域不会发生发泡。
In order to shorten and simplify the technological process for preparing foamable precursor of aluminum foam sandwich (AFS), this paper describes a new method for preparing foamable precursor of AFS via hot-pressing. A foamable precursor with a denser core layer can be obtained by applying pressure to an aluminum box, formed by placing core layer powders on a flanged aluminum plate and sealing the powders in with other flanged plates. The best preparation conditions were found to involve cold prepressing combined with hot-pressing at 450 °C, both at a pressure of 300 MPa, and holding for 2 min at each pressure stage. The pressure can be reduced to 100 MPa in order to reduce the cost of equipment, but at this pressure, foaming cannot occur at the flanged areas of foamable precursor, due to the low density of the core layer.