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首页> 外文会议>International Conference on Advanced Nondestructive Evaluation >Characterization of Material Degradation in Epoxy Film Based on Scanning Acoustic Microscopy(SAM)
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Characterization of Material Degradation in Epoxy Film Based on Scanning Acoustic Microscopy(SAM)

机译：基于扫描声学显微镜（SAM）的环氧膜材料降解的表征

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In order to evaluate the degradation of the epoxy coating in nuclear power plants, acoustic wave velocities of epoxy films are measured using defocused scanning acoustic microscopy system(SAM). Unlike metals, the surface of the epoxy coating on the concrete liner is so thin and wavy that the conventional ultrasonic techniques for acoustic velocity of epoxy coating are hard to apply. Acoustic velocities of bulk waves are determined from V(z,t) curves of mode-converted waves generated in the film by SAM. Epoxy films are fabricated and degraded under various accelerated aging conditions, and both of longitudinal and shear wave velocities of the epoxy film are measured. Approximately 10 percent of reduction in acoustic wave velocity is observed from experimental results when the aging is developed fully in epoxy films. It is also found that longitudinal wave is more sensitive to deterioration of epoxy coating than transverse wave.
机译：为了评估核电厂中环氧涂层的劣化，使用离焦扫描声学显微镜系统（SAM）测量环氧膜的声波速度。与金属不同，混凝土衬里上的环氧涂层的表面如此薄，并且常规超声波涂层声速的传统超声波技术难以施加。散波的声速度由SAM在膜中产生的模式转换波的V（Z，T）曲线确定。在各种加速老化条件下制造并降解环氧膜，测量环氧膜的纵向和剪切波速度。当老化在环氧薄膜中完全开发时，从实验结果中观察到声波速度的大约10％的声波速度。还发现纵向波对环氧树脂涂层的劣化比横波更敏感。

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