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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Measurement of thermal diffusivity, elastic anisotropy and crystallographic orientation by interferometric photothermal microscopy
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Measurement of thermal diffusivity, elastic anisotropy and crystallographic orientation by interferometric photothermal microscopy

机译:用干涉光热显微镜测量热扩散率,弹性各向异性和晶体取向

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摘要

This paper describes the use of interferometric photothermal microscopy for measuring the thermal diffusivity, crystallographic orientation and elastic anisotropy of a microscopic homogeneous volume of matter. This purely optical technique makes use of an intensity-modulated and focused laser beam to periodically heat the surface of the sample tested. An interferometer is used to detect the thermal expansion. After describing the experimental setup, we explain the inversion scheme allowing the determination of the local thermal diffusivity from the periodic sample surface displacement map, as well as the crystallographic orientation and elastic anisotropy in the case of cubic materials. These parameters are measured with a spatial resolution of a few cubic micrometres.
机译:本文介绍了使用干涉光热显微镜测量微观均匀体积物质的热扩散率,晶体学取向和弹性各向异性的方法。这种纯光学技术利用强度调制和聚焦的激光束定期加热被测样品的表面。干涉仪用于检测热膨胀。在描述了实验装置之后,我们说明了可以从周期性样品表面位移图确定局部热扩散率的反演方案,以及在立方材料的情况下的晶体学取向和弹性各向异性。这些参数以几立方微米的空间分辨率进行测量。

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