Fabrication of Aluminum Foams with Fine Cell Structure under Increased Pressure
Fabrication of Aluminum Foams with Fine Cell Structure under Increased Pressure
复制标题
加压下细孔结构泡沫铝的制备
DOI：
10.1002/adem.201500511
复制
发表时间：
2016-06-01
影响因子：
3.6
通讯作者：
Luo, Hongjie
中科院分区：
文献类型：
--
作者：
Cao, Zhuokun;Li, Min;Luo, Hongjie
含氢化钛粉末的铝熔体在加压下发泡。实时记录了铝熔体的泡沫膨胀高度，表征了泡沫试样的泡孔结构。研究发现，在发泡过程中，当在增加的压力下发泡时，发泡气体到周围环境中的损失减少。气泡聚并随着压力的增加而减慢，导致平均泡孔尺寸及其分布范围显著减小。当在增加的压力下发泡时，平均泡孔壁厚度也显著减小，这改变了平均泡孔尺寸和泡沫密度之间的相关性。
Foaming of aluminum melts containing titanium hydride powder is processed under increased pressure. The real-time foam expansion height of aluminum melts is recorded and the cell structure of foam specimens is characterized. It is found that the loss of foaming gas to ambient environment during foaming process is reduced when foaming under increased pressure. Bubble coalescence is slowed down when pressure increases, leading to a significant decrease in mean cell size and its distribution range. The mean cell wall thickness also significantly reduces when foaming at increased pressure, which changes the correlation between mean cell size and foam density.