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Analysis of dispersion techniques of boron carbide nanoparticles in AA-6061 matrix using powder metallurgy approach.

机译：粉末冶金法分析碳化硼纳米粒子在AA-6061基体中的分散技术。

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摘要

Aluminum has a combination of properties that makes it one of the most versatile of all engineering materials. It can be alloyed with other elements to get a customized set of mechanical properties. Aluminum alloy AA-6061 is one such combination which provides medium-to-high-strength, good formability and good corrosion resistance along with low density. Boron carbide is third hardest of all materials with a density of 2.54 g/cm 3. There is a possibility of increasing the hardness and other mechanical properties of aluminum or aluminum alloys without affecting the overall weight of the component by developing aluminum matrix composites. In the present study nanosize boron carbide particles were dispersed in AA-6061 matrix forming a new aluminum matrix nanocomposite. The biggest challenge was to disperse the nanoparticles evenly into aluminum alloy matrix down to the nanometer level. For this purpose several techniques, such as wet and dry mixing, low-energy wet and dry milling with different media and cryomilling techniques were employed. It has been concluded that none of these techniques could provide dispersion down to nanometer level. Because of this difficulty mechanical properties of the composite material decreased when compared to aluminum alloy 6061. Based on the performed investigations it can be concluded that initial results are promising but dispersion techniques needs to be perfected first.
机译：铝具有多种特性，使其成为所有工程材料中用途最多的一种。它可以与其他元素合金化以获得一组定制的机械性能。铝合金AA-6061是一种这样的组合，可提供中等至高强度，良好的可成型性，良好的耐腐蚀性以及低密度。碳化硼是所有材料中硬度第三高的材料，密度为2.54 g / cm3。通过开发铝基复合材料，可以提高铝或铝合金的硬度和其他机械性能，而不影响组件的总重量。在本研究中，将纳米碳化硼颗粒分散在AA-6061基质中，形成了一种新的铝基质纳米复合材料。最大的挑战是将纳米颗粒均匀分散到铝合金基质中，直至纳米级。为此，采用了几种技术，例如湿法和干法混合，使用不同介质的低能湿法和干法研磨以及冷冻研磨技术。已经得出结论，这些技术都不能提供低至纳米水平的分散。由于这种困难，与铝合金6061相比，复合材料的机械性能下降。基于进行的研究，可以得出结论，初步结果是有希望的，但首先需要完善分散技术。

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  • 作者

    Khakwani, Sheraz Mehmood.;

  • 作者单位

    Lehigh University.;

  • 授予单位 Lehigh University.;
  • 学科 Engineering Materials Science.
  • 学位 M.S.
  • 年度 2009
  • 页码 108 p.
  • 总页数 108
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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