Synthesis and characteristics of continuous basalt fiber reinforced aluminum matrix composites
Synthesis and characteristics of continuous basalt fiber reinforced aluminum matrix composites
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DOI：
10.1177/0021998312465765
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发表时间：
2013-12-01
影响因子：
2.9
通讯作者：
Sabet, S. M. M.
中科院分区：
文献类型：
--
作者：
Akhlaghi, F.;Eslami-Farsani, R.;Sabet, S. M. M.
这项研究首次通过各种热稳定性和机械性能的实验工作研究了玄武岩纤维作为金属基复合材料增强材料的适用性。评估玄武岩纤维在炉中暴露于不同温度预定时间后和/或浸入熔融铝中不同时间长度后的残余拉伸强度值。在这些实验研究中，优化了制造这些复合材料的加工方法。在该方法中，通过将玄武岩预制件浸入铝熔体中一小段时间，从而在其上涂上一层薄薄的铝。将这些层压板堆叠在模具中并通过热压（300℃、7分钟和630MPa）进行固结。微观结构研究证实了铝和玄武岩之间的良好结合以及基体合金内纤维的合理均匀分布。扫描电子显微镜研究揭示了基体合金中断裂的玄武岩纤维以及基体合金偶尔不正确地渗透到纤维束中。因此，铝/玄武岩复合材料的机械性能远远低于混合物定律预测的预期。然而，这些新开发的金属基复合材料的强度值仍然足以满足某些工程应用的需要。
This study, for the first time investigates the applicability of basalt fiber as a reinforcing material for metal matrix composites through various experimental works for thermal stability and mechanical properties. The residual tensile strength values of basalt fibers after being exposed at different temperatures in a furnace for pre-determined times and/or after being immersed into molten aluminum for different lengths of time were evaluated. Throughout these experimental studies, a processing method for fabrication of these composites was optimized. In this method, basalt preforms were coated with a thin layer of aluminum by immersion into aluminum melt for a short period of time. These laminates were stacked in a mold and consolidated by hot pressing (300?, 7 min and 630MPa). The microstructural studies confirmed a good bonding between aluminum and basalt together with a reasonably uniform distribution of fibers within the matrix alloy. Scanning electron microscopy studies revealed the fractured basalt fibers in the matrix alloy as well as occasional improper infiltration of the matrix alloy into the fiber bundles. Consequently, the mechanical properties of aluminum/basalt composites were far inferior to those expected by law of mixtures predictions. However, the strength values of these newly developed metal matrix composites are still adequate for some engineering applications.