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首页> 外文期刊>Journal of Materials Research >Anomalously high density and thermal stability of nanotwins in Ni(W) thin films: Quantitative analysis by x-ray diffraction
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Anomalously high density and thermal stability of nanotwins in Ni(W) thin films: Quantitative analysis by x-ray diffraction

机译：Ni（W）薄膜中纳米孪晶的异常高密度和热稳定性：X射线衍射定量分析

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摘要

Magnetron-sputtered Ni(W) films appear to possess a high density of nanotwins oriented parallel to the film surface which highly influences the properties of Ni(W) films. A sophisticated analysis method for describing the stacking sequence of close-packed atomic layers by statistical parameters has been developed which is based on the evaluation of intensity streaks in reciprocal space measured by (x-ray) synchrotron diffraction. In particular, the degree of hexagonality introduced by twinning into these ideally face-centered cubic-stacked films can be quantified. The validity of the proposed analysis has been confirmed by direct observation of the stacking sequences of close-packed layers using (high-resolution) transmission electron microscopy. It has been shown that the degree of hexagonality in the as-deposited state is practically proportional to the W content. Further, the thermal stability of the nanotwins increases with increasing W content which can be understood by the appearance of hexagonal close-packed-like domains exhibiting an intrinsic thermodynamic stability.
机译：磁控溅射Ni（W）薄膜似乎具有平行于薄膜表面取向的高密度纳米孪晶，这极大地影响了Ni（W）薄膜的性能。已经开发出了一种复杂的分析方法，该方法用于通过统计参数描述紧密堆积的原子层的堆叠顺序，该方法基于对通过（x射线）同步加速器衍射测量的倒易空间中的强度条纹进行评估。特别地，可以定量通过孪晶引入这些理想的面心立方堆叠的膜中而引入的六角形程度。通过使用（高分辨率）透射电子显微镜直接观察密堆积层的堆积顺序，已证实了所提出分析的有效性。已经表明，在沉积状态下的六角形度实际上与W含量成正比。此外，纳米孪晶的热稳定性随着W含量的增加而增加，这可以通过呈现出固有的热力学稳定性的六角形紧密堆积的畴的出现来理解。

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  • 来源
    《Journal of Materials Research》 |2014年第15期|1642-1655|共14页
  • 作者

    S.J.B. Kurz; A. Leineweber; E.J. Mittemeijer;

  • 作者单位

    Phase Transformations, Thermodynamics and Kinetics, Max Planck Institute for Intelligent Systems (formerly Max Planck Institute for Metals Research), D-70569 Stuttgart, Germany;

    Phase Transformations, Thermodynamics and Kinetics, Max Planck Institute for Intelligent Systems (formerly Max Planck Institute for Metals Research), D-70569 Stuttgart, Germany;

    Phase Transformations, Thermodynamics and Kinetics, Max Planck Institute for Intelligent Systems (formerly Max Planck Institute for Metals Research), D-70569 Stuttgart, Germany,Institute for Materials Science, University of Stuttgart, D-70569 Stuttgart, Germany;

  • 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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