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Mechanical properties of Al_2O_3-functionalized nanoporous gold foams under irradiation

机译：辐照下AL_2O_3官能化纳米孔金泡沫的机械性能

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摘要

Nanoporous gold (np-Au) has unique properties due to its high surface-to-volume ratio; in particular, it displays different degrees of radiation sensitivity, from radiation tolerance to significant radiation-induced hardening. However, its thermal instability and propensity to coarsening limit practical applications. It is known that oxide functionalization of np-Au surface improves thermal stability and increases both hardness and elastic modulus of the metallic foam. Nevertheless, the changes in the material properties under irradiation have not been investigated yet. In this work, we address the questions of radiation sensitivity of atomic layer deposition (ALD)-coated np-Au, and how its mechanical properties change after irradiation. ALD Al_2O_3-coated gold nanofoams were synthetized and irradiated with Ne~(++) ions and their mechanical behavior was evaluated by nanoindentation. It is concluded that the as-prepared functionalized np-Au hardens and stiffens after ion irradiation depending on the dose, without losing toughness and wear resistance.
机译：纳米多孔金（NP-AU）由于其高度的高度比率具有独特的特性;特别地，它显示出不同程度的辐射灵敏度，从辐射耐受对显着的辐射诱导的硬化。然而，其热不稳定和粗化限制实际应用的倾向。众所周知，NP-Au表面的氧化物官能化改善了热稳定性并增加了金属泡沫的硬度和弹性模量。尽管如此，尚未研究辐照下材料特性的变化。在这项工作中，我们解决了原子层沉积（ALD） - 涂覆的NP-Au的辐射敏感性问题，以及其机械性能如何在照射后变化。合成和用NE〜（++）离子合成并照射涂覆的金纳米蛋白，并通过纳米凸缘评估它们的机械行为。结论是，根据剂量，如制备的官能化NP-Au在离子照射后硬化和变硬，而不会失去韧性和耐磨性。

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  • 来源
    《Journal of Materials Research》 |2021年第10期|2001-2009|共9页
  • 作者

    D. F. Lionello; J. I. Ramallo; M. Caro; Y. Q. Wang; C. Sheehan; J. K. Baldwin; J. Nogan; A. Caro; M. C. Fuertes; C. J. Ruestes;

  • 作者单位

    Gerencia Quimica & Institute de Nanociencia y Nanotecnologia Centro Atomico Constituyentes CNEA-CONICET Buenos Aires (B1650KNA) Argentina;

    Gerencia Quimica & Institute de Nanociencia y Nanotecnologia Centro Atomico Constituyentes CNEA-CONICET Buenos Aires (B1650KNA) Argentina Instituto Sabato Centro Atomico Constituyentes CNEA-UNSAM Buenos Aires (B1650KNA) Argentina;

    Department of Mechanical Engineering Virginia Polytechnic Institute Falls Church VA 22043 USA;

    Materials Science and Technology Division Los Alamos National Laboratory Los Alamos NM 87545 USA;

    Center for Integrated Nanotechnology Los Alamos National Laboratory Los Alamos NM 87545 USA;

    Center for Integrated Nanotechnology Los Alamos National Laboratory Los Alamos NM 87545 USA;

    Center for Integrated Nanotechnology Sandia National Laboratory Albuquerque NM 87185 USA;

    College of Professional Studies George Washington University Ashburn VA 20147 USA;

    Gerencia Quimica & Institute de Nanociencia y Nanotecnologia Centro Atomico Constituyentes CNEA-CONICET Buenos Aires (B1650KNA) Argentina;

    Facultad de Ciencias Exactas y Naturales Instituto Interdisciplinario de Ciencias Basicas Universidad Nacional de Cuyo CONICET 5500 Mendoza Argentina;

  • 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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