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Characterization of pore morphology in molecular crystal explosives by focused ion-beam nanotomography

机译：聚焦离子束纳米断层扫描表征分子晶体炸药中的孔形态

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摘要

The initiation and detonation properties of explosives are often empirically correlated to density, surface area, and particle size. Although these correlations are sometimes used successfully to predict the performance of bulk samples, the data are spatially averaged, which unfortunately muddles information critical to understanding fundamental processes. Density and surface area are essentially an indirect measure of porosity, which is arguably a more appropriate metric in many applications. We report the direct characterization of porosity in polycrystalline molecular crystal explosives by focused ion beam nanotomography, a technique that is typically reserved for robust materials such as ceramics and metals. The resulting three-dimensional microstructural data are incredibly rich, promising a substantial advance in our ability to unravel the processes governing initiation and detonation of molecular crystal explosives. In a larger context, this work demonstrates that focused ion beam nanotomography may be successfully extended to the investigation of nanoscale porosity in other molecular crystal or polymer materials.
机译：炸药的起爆特性通常在经验上与密度，表面积和粒径有关。尽管有时可以将这些相关性成功地用于预测大量样本的性能，但是对数据进行空间平均，不幸的是，这混淆了对于理解基本过程至关重要的信息。密度和表面积本质上是孔隙度的间接度量，可以说是在许多应用中更合适的度量。我们报告了通过聚焦离子束纳米断层扫描技术对多晶分子晶体炸药中孔隙率的直接表征，该技术通常保留用于坚固的材料，例如陶瓷和金属。由此产生的三维微观结构数据非常丰富，有望在我们阐明控制分子晶体炸药的起爆过程的能力方面取得重大进展。在更大的范围内，这项工作表明聚焦离子束纳米断层扫描可以成功地扩展到其他分子晶体或聚合物材料中的纳米级孔隙率的研究。

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  • 来源
    《Journal of Materials Research》 |2010年第7期|P.1362-1370|共9页
  • 作者

    Ryan R. Wixom; Alexander S. Tappan; Aaron L. Brundage; Robert Knepper; M. Barry Ritchey; Joseph R. Michael; Michael J. Rye;

  • 作者单位

    Sandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

    rnSandia National Laboratories, Albuquerque, New Mexico 87185;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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