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Nanocomposites: Technologically Advanced Material for Wide Engineering Applications

机译：纳米复合材料：适用于广泛工程应用的技术先进材料

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Background: Since the available metals are not able to meet the desired structural, mechanical and electrochemical properties therefore composites and nanocomposites are being used now a days. Composites are an amalgamation of materials that are mixed together to develop new compound with special and superior properties as compared to the base material. Nanocomposite is a new approach in which out of two phase, any one phase should consist of single unit sized particle whose dimension lies in between 1 and 1000 nanometres (nm) but usually it lies between 1-100 nm Objective: The present paper provides an overview on the different types of nanocomposites, their manufacturing, mechanical behaviour & industrial applications. Method: Gupta et al. synthesized iron (Fe) - alumina (Al2O3) metal matrix nanocomposites synthesized via powder metallurgy technique. Composition selected for the study was in the range of 5-30wt% of Al2O3 in Fe matrix. Specimens were synthesized by ball milling, compaction and sintering in argon atmosphere in temperature range of 900-1100°C for 1 to 3 hour respectively. Results: It was found that due to reactive sintering between iron and alumina particles an iron aluminate (FeAl2O4) phase forms. Formation of nano iron aluminate phases and related properties also depend on processing parameters. It was also found that the mechanical and electrochemical properties varies with the sintering parameters which in turn depend upon the iron aluminate phase formation. Conclusion: Metal Matrix Nanocomposites are excellent for manufacturing materials having high strength in the case of shear & compression processes and have ability to work at elevated temperature.
机译：背景：由于可用的金属不能满足所需的结构，机械和电化学性能，因此复合材料和纳米复合材料现在已经使用了几天。复合材料是将材料混合在一起的混合物，可以开发出与基础材料相比具有特殊和优越性能的新化合物。纳米复合材料是一种新方法，其中在两相中，任何一个相都应由单个单位大小的颗粒组成，其尺寸在1至1000纳米（nm）之间，但通常在1至100 nm之间。目的：本论文提供了一种概述了不同类型的纳米复合材料，它们的制造，机械行为和工业应用。方法：Gupta等。粉末冶金技术合成的铁（Fe）-氧化铝（Al2O3）金属基纳米复合材料。在本研究中选择的成分为Fe基体中Al2O3的5-30wt％。通过在900-1100℃的温度范围内的氩气氛中进行球磨，压实和烧结分别进行1-3小时来合成样品。结果：发现由于铁和氧化铝颗粒之间的反应性烧结，形成了铝酸铁（FeAl2O4）相。纳米铝酸铁相的形成和相关性能还取决于加工参数。还发现机械和电化学性能随烧结参数而变化，而烧结参数又取决于铝酸铁相的形成。结论：金属基纳米复合材料非常适合在剪切和压缩过程中制造具有高强度的材料，并具有在高温下工作的能力。

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