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首页> 外文期刊>Advanced Science, Engineering and Medicine >Corrosion Behavior of Al_2O_3 Reinforced Fe Metal Matrix Nanocomposites Produced by Powder Metallurgy Technique
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Corrosion Behavior of Al_2O_3 Reinforced Fe Metal Matrix Nanocomposites Produced by Powder Metallurgy Technique

机译：粉末冶金技术制备的Al_2O_3增强Fe金属基纳米复合材料的腐蚀行为

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摘要

Corrosion behavior of Al_2O_3 reinforced Fe-based metal matrix nanocomposites (Fe-5 wt% Al_2O_3), prepared by powder metallurgy route has been compared with that of pure Fe in freely aerated 1N HCI solution. The composite and Fe specimens were prepared by sintering in an argon atmosphere in the temperature range 900-1100 ?C for 1-3 hours. Microstructure of composite shows presehce of Fe as matrix phase with Al_2O_3 and nano size iron aluminate as dispersed phases. Presence of ceramic Al_2O_3 and iron aluminate particles improved the corrosion resistance of iron, which depend on sintering temperature and time. Corrosion resistance improved with increasing sintering temperature and time. X-ray diffraction (XRD) patterns of corroded specimens revealed the formation of aluminum Chlorate (AICl_3O_(12)). Concentration of AICl_3O_(12) phase was highest in the specimen with highest corrosion rate and was lowest in the specimen with low corrosion rate. SEM shows a combination of bed of grains in the specimen with low corrosion while the grains were shattered heavily in the specimen with high corrosion.
机译：比较了用粉末冶金法制备的Al_2O_3增强Fe基金属基纳米复合材料（Fe-5 wt％Al_2O_3）与纯Fe在1N HCl充气溶液中的腐蚀行为。通过在氩气氛中在900-1100℃的温度范围内烧结1-3小时来制备复合材料和铁样品。复合材料的微观结构表明，Fe以基体相的形式存在，Al_2O_3和纳米级铝酸铁为分散相。陶瓷Al_2O_3和铝酸铁颗粒的存在提高了铁的耐腐蚀性，这取决于烧结温度和时间。耐腐蚀性随烧结温度和时间的增加而提高。腐蚀后的样品的X射线衍射（XRD）图谱表明形成了氯酸铝（AICl_3O_（12））。 AlCl_3O_（12）相的浓度在腐蚀速率最高的样品中最高，而在腐蚀速率低的样品中最低。扫描电镜显示了低腐蚀样品中颗粒的结合，而高腐蚀样品中颗粒的破碎严重。

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