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Elastic-properties measurement at high temperatures through Contact Resonance Atomic Force Microscopy

机译:通过接触共振原子力显微镜的高温下的弹性性能测量

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Miniaturization of products and need for further improvement of machines performance introduce new serious challenges in materials characterization. In particular non-destructive mechanical testing in the submicrometer scale is needed to better understand and improve micro-manufacturing operations. To this regard, some open issues are of particular interest: low depth of penetration, high lateral resolution and measurements at elevated temperatures. An interesting solution is given by acoustic microscopy techniques, which can be successfully implemented for advanced research in surface elasticity, allowing fast direct and non-destructive measurement of Young's modulus and related surface parameters. In this work an instrument set up for Contact Resonance Atomic Force Microscopy is proposed, where the sample with is coupled to a heating stage and a piezoelectric transducer directly vibrate the cantilever during scanning, in order to allow exploitation of high resolution measurements at relatively high temperatures. Such instrument set up was undergone a set of calibration experiments in order to allow not only qualitative but also quantitative characterization of surfaces. The work was completed with a feasibility study with mechanical and topography measurements at temperatures as high as 150°C, with lateral resolution lower than 100 nm.
机译:产品的小型化和需要进一步改进机器性能在材料表征中引入了新的严重挑战。特别是在亚微米计级中的非破坏性机械测试需要更好地理解和改善微制造操作。为此,一些开放问题特别令人兴趣:渗透深度低,横向分辨率高,温度升高。声学显微镜技术提供了一个有趣的解决方案,可以成功实现用于表面弹性的高级研究,允许快速直接和非破坏性测量杨氏模量和相关表面参数。在这作用中,提出了一种用于接触谐振原子力显微镜的仪器,其中样品与加热级耦合,并且压电换能器在扫描过程中直接振动悬臂,以便在相对高的温度下开采高分辨率测量。这些仪器设置经历了一组校准实验,以允许不仅定性而且是表面的定量表征。该作品完成了在高达150°C的温度下的机械和地形测量的可行性研究,横向分辨率低于100nm。

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