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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Depth Profile of Filler Volume Fraction in Graded Aluminum-Epoxy Composites Using Photoacoustic Method
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Depth Profile of Filler Volume Fraction in Graded Aluminum-Epoxy Composites Using Photoacoustic Method

机译：光声法梯度铝-环氧树脂复合材料中填料体积分数的深度分布

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摘要

A photoacoustic signal in graded aluminum-epoxy composites was measured with varying chopping frequency to evaluate the change in aluminum volume fraction with depth. The decrease in the normalized photoacoustic signal with decreasing chopping frequency in graded aluminum-epoxy composites was attributed to the increase in the average thermal effusivity due to the increase in aluminum concentration with depth. The quantitative aluminum volume fraction was estimated from the variation of the photoacoustic signal using Rosencwaig-Gersho (R-G) theory combined with the Maxwell-Garnet effective-medium theory. The aluminum volume fraction was estimated to be in agreement with quantitative image analysis within 3%, which justifies the use of the photoacoustic method in determining the filler volume fraction and the depth profile in graded two-phase composites.
机译：用不同的斩波频率测量渐变铝-环氧树脂复合材料中的光声信号，以评估铝体积分数随深度的变化。在梯度铝-环氧树脂复合材料中，随着斩波频率的降低，归一化光声信号的降低归因于平均热效率的提高，这是由于铝浓度随深度的增加而增加的。使用Rosencwaig-Gersho（R-G）理论和Maxwell-Garnet有效介质理论，根据光声信号的变化估算铝的定量含量。铝体积分数估计与定量图像分析一致，误差在3％以内，这证明了使用光声法确定梯度两相复合材料的填料体积分数和深度分布是合理的。

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