A method for the reuse of aluminum (alloy 5754) sawing chips as a starting material for manufacturing aluminum matrix syntactic foams by powder metallurgy is described. In the tested samples, spherical Ni-superalloy hollow particles were used to increase the closed porosity of specimens up to 50 wt.%. Spark plasma sintering was used to consolidate the specimens. Only the sample with 30% hollow particles showed a clear maximum corresponding to a compression strength of 130 MPa. For all the samples, the plateau stress was over 120 MPa. The densification strain was over 40%, reaching 61% for the sample containing 30% hollow particles. All the samples showed high energy absorption capabilities and good absorption efficiency.

中文翻译：

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由回收锯屑制成的复合泡沫铝

描述了一种再利用铝（合金 5754）锯片作为通过粉末冶金制造铝基复合泡沫的原材料的方法。在测试样品中，球形镍超合金空心颗粒用于将样品的闭孔率提高至 50 wt.%。使用火花等离子体烧结来固结样品。只有含有 30% 中空颗粒的样品显示出与 130 MPa 抗压强度相对应的明显最大值。对于所有样品，平台应力均超过 120 MPa。致密化应变超过 40%，含有 30% 空心颗粒的样品达到 61%。所有样品均表现出较高的能量吸收能力和良好的吸收效率。