This study evaluates foaming behavior and pore structure evolution of aluminum foam by cross-sectional image processing, which was prepared by the powder compact melting (PCM) method under the constraint. The results revealed that the heating time and the heating rate are the key factors affecting the foaming behavior and pore structure of aluminum foam. The thermal decomposition of the foaming agent and aluminum melting behavior affect the foam expansion under different heating times and heating rates. The evolution of the pore structure during the foaming process includes pore formation, small-sized spherical pores, large-sized spherical pores, polygonal pores, merging, and collapse. Due to the limitation of the pipe wall, the maximum expansion height and porosity are constrained, and the macrostructure of aluminum foam is improved.

中文翻译：

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挤压约束下泡沫铝的发泡行为和孔结构演变

这项研究通过截面图像处理评估了泡沫铝的发泡行为和孔结构演变，该图像处理是在约束条件下通过粉末紧密熔炼（PCM）方法制备的。结果表明，加热时间和加热速率是影响泡沫铝泡沫行为和孔结构的关键因素。发泡剂的热分解和铝的熔融行为会影响不同加热时间和加热速率下的泡沫膨胀。在发泡过程中孔结构的演变包括孔形成，小球形孔，大球形孔，多边形孔，合并和塌陷。由于管壁的限制，最大膨胀高度和孔隙率受到限制，泡沫铝的宏观结构得到改善。