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首页> 外文期刊>American Journal of Mechanical and Materials Engineering >Processing of Mg-3.2 Al-2.4 Zn Alloy Matrix In-situ Composites by Reactive Infiltration Technique
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Processing of Mg-3.2 Al-2.4 Zn Alloy Matrix In-situ Composites by Reactive Infiltration Technique

机译：反应渗透技术处理Mg-3.2 Al-2.4 Zn合金基体原位复合材料

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摘要

Mg alloy matrix composites having a combination of their indispensable and superior properties have drawn an attention for various implementations especially in automotive and aerospace industries. Mg in-situ composites were synthesized using Mg-3.2Al-2.4Zn alloy ingot, coarse Ti and B_4C powder. Ti and B4C powders were mixed in a plastic bottle with zirconia balls in Ar atmosphere by ball milling. The resulting mixture of these powders was compacted into a cylindrical preform which was infiltrated by Mg-3.2Al-2.4Zn alloy under capillary force. The infiltration of the preform was performed in an electric resistance furnace at the temperatures of 800℃ and 900℃ for different holding time in Ar atmosphere. The microstructure of the in-situ composites was investigated with a field emission scanning electron microscope (FESEM) equipped with Energy Dispersive X-ray (EDX). The formation of phases in the in-situ composites during processing was identified using XRD with Cu Kα radiation. SEM revealed different phases in the in-situ composites. It was found in XRD pattern that TiC TiB_2, TiB, MgB_2, MgB_4, B_(13)C_2 and Ti_2AlC compounds were formed during infiltration of Mg-3.2 Al-2.4 Zn alloy matrix in the composites. The effect of processing parameters on bulk density and Brinell hardness was also discussed.
机译：具有必不可少的优异性能的镁合金基复合材料引起了各种实施的关注，特别是在汽车和航空航天工业中。利用Mg-3.2Al-2.4Zn合金锭，粗Ti和B_4C粉末合成了Mg原位复合材料。将Ti和B4C粉末在Ar气氛中通过球磨在装有氧化锆球的塑料瓶中混合。将得到的这些粉末的混合物压制成圆柱形的预型件，该预型件在毛细管力作用下被Mg-3.2Al-2.4Zn合金渗透。在Ar气氛中，在800℃和900℃的温度下，在不同的保温时间下，在电阻炉中进行预成型件的渗透。原位复合材料的微观结构用配备了能量色散X射线（EDX）的场发射扫描电子显微镜（FESEM）进行了研究。使用XRD和CuKα辐射，可以确定加工过程中原位复合材料中的相形成。 SEM显示了原位复合材料的不同相。在XRD图谱中发现在复合材料中Mg-3.2 Al-2.4 Zn合金基体渗透过程中形成TiC TiB_2，TiB，MgB_2，MgB_4，B_（13）C_2和Ti_2AlC化合物。还讨论了加工参数对堆积密度和布氏硬度的影响。

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