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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Sintering Atmosphere on the Mechanical Properties of Al-Fe Particle-Reinforced Al-Based Composites
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Effects of Sintering Atmosphere on the Mechanical Properties of Al-Fe Particle-Reinforced Al-Based Composites

机译：烧结气氛对Al-Fe颗粒增强Al基复合材料力学性能的影响

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摘要

Al-based composites reinforced by Al-Fe intermetallic compounds have been fabricated by powder metallurgy technique. The reinforcements were formed in the aluminum matrix by in situ solid-state reaction between pure Al and pure Fe powders. The effects of sintering atmosphere on the microstructures and mechanical properties of the composites were systematically studied by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction analysis, and compressive tests. It has been shown that Al-Fe intermetallic particles (including a large number of the Fe-Al5Fe2 core-shell structured particles) were the dominant reinforcements in the composites sintered under Ar atmosphere, while pure Fe particles were the dominant reinforcements in the composites sintered under N-2 atmosphere. N-2 atmosphere is more effective than Ar atmosphere in increasing the sintered density of the composites due to the formation of aluminum nitride, which can effectively fill the pores. Thus, the compressive mechanical properties of the composites sintered under N-2 atmosphere are higher than those of the composites sintered under Ar atmosphere.
机译：利用粉末冶金技术制备了由铝铁金属间化合物增强的铝基复合材料。通过在纯铝和纯铁粉末之间进行原位固态反应，在铝基质中形成增强材料。通过扫描电子显微镜，能量色散X射线能谱，X射线衍射分析和压缩试验，系统地研究了烧结气氛对复合材料微观结构和力学性能的影响。研究表明，Al-Fe金属间化合物颗粒（包括大量的Fe-Al5Fe2核壳结构颗粒）是在Ar气氛下烧结的复合材料中的主要增强材料，而纯Fe颗粒是烧结后的复合材料中的主要增强材料在N-2气氛下。由于氮化铝的形成，N-2气氛比Ar气氛在提高复合材料的烧结密度方面更有效，而氮化铝可以有效地填充孔。因此，在N-2气氛下烧结的复合材料的压缩机械性能高于在Ar气氛下烧结的复合材料的压缩机械性能。

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