... 关键字: 泡沫铝；熔体发泡法；无泡层；黏度；表面张力[gap=1298]Key words: Al foam; melt foaming method; bubble-free layer; viscosity; surface tension...
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The merging of bubbles and formation of bubble-free layer were also described.
表述了气泡的合并和无泡层的形成。
The drainage phenomenon leads to formation of free-bubble layer and the rheology of bubbles leads to formation of gradient pore structure.
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；
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.
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。
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