表述了气泡的合并和无泡层的形成。
The merging of bubbles and formation of bubble-free layer were also described.
泡沫铝常见的内部缺陷主要有底部无泡层、局部无泡区和内部热裂纹。
There are three main interior structure defects in the preparation of aluminum foam with melt foaming process such as free-bubble-layer at the bottom, partial free-bubble-zone and heat crack.
排液的最终结果是在泡沫铝底部形成无泡层，气泡的流变引起泡沫铝梯度孔结构的变化；
The drainage phenomenon leads to formation of free-bubble layer and the rheology of bubbles leads to formation of gradient pore structure.
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