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首页> 外文期刊>Materials Science and Engineering >Effect of SiC particle content on foaming and mechanical properties of remelted and diluted A356/SiC composite
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Effect of SiC particle content on foaming and mechanical properties of remelted and diluted A356/SiC composite

机译：SiC颗粒含量对重熔和稀释的A356 / SiC复合材料发泡和力学性能的影响

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摘要

A commercial Al-Si-Mg composite was diluted to different SiC (mean size: 8 μm) contents, and was foamed using TiH_2 by melt based technique at a fixed foaming temperature. Foams with high expansions were achieved and uniform cell morphology is obtained at and below 10 vol% SiC. Despite good expansions, certain amount of foam collapse occurs for 5 vol% SiC composite. This work brings out that presence of SiC alone can lead to good foaming but these foams are unstable prior to solidification. This instability can be correlated to in situ oxide content. Both compression and impact (perforation) tests show improved properties with the increase in foam density. Compressive strength is not influenced by SiC content, and energy absorption too seems to be insensitive to the rate of loading within six orders of magnitude.
机译：将商品化的Al-Si-Mg复合材料稀释至不同的SiC（平均尺寸：8μm）含量，并使用TiH_2通过基于熔融的技术在固定的发泡温度下发泡。当SiC含量在10％（体积）或低于10％（体积）时，可获得高膨胀泡沫，并获得均匀的泡孔形态。尽管膨胀良好，但对于5％（体积）的SiC复合材料，泡沫仍会发生一定程度的破裂。这项工作表明，单独存在SiC可以导致良好的发泡，但是这些泡沫在固化之前是不稳定的。这种不稳定性可以与原位氧化物含量相关。压缩和冲击（穿孔）测试均显示出随泡沫密度增加而改善的性能。压缩强度不受SiC含量的影响，能量吸收似乎对六个数量级内的负载速率也不敏感。

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