| Photoacoustic measurement of thermal properties and thickness of buried layers in a multilayer film |
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| 引用本文： | SUN Hongwei,SHEN Jun,ZHANG Guoming HUANG Mengcai (Central Laboratory. Suzhou University. Suzhou 215006). Photoacoustic measurement of thermal properties and thickness of buried layers in a multilayer film[J]. 声学学报：英文版, 1993, 0(4) |
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| 作者姓名： | SUN Hongwei SHEN Jun ZHANG Guoming HUANG Mengcai (Central Laboratory. Suzhou University. Suzhou 215006) |
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| 摘 要： | The photoacoustic model of multilayer with a strong-absorbing surface layer is developed. The phase of ph0toacoustie signal is measured as a function of modulated frequency using apparatus totally controlled by a computer system. The thermal diffusivity, effusivity as well as thickness of several buried layers are obtained independently through the best fit of experimental data according to the theoretical model. The multilayers of thin metal and alloy film are investigated. This method is proved to be valuable particularly in nondestructive examination of subsurface physical properties.
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Photoacoustic measurement of thermal properties and thickness of buried layers in a multilayer film |
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| SUN Hongwei,SHEN Jun,ZHANG Guoming HUANG Mengcai. Photoacoustic measurement of thermal properties and thickness of buried layers in a multilayer film[J]. Chinese Journal of Acoustics, 1993, 0(4) |
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| Authors: | SUN Hongwei SHEN Jun ZHANG Guoming HUANG Mengcai |
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| Affiliation: | Central Laboratory. Suzhou University. Suzhou 215006 |
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| Abstract: | The photoacoustic model of multilayer with a strong-absorbing surface layer is developed. The phase of photoacoustic signal is measured as a function of modulated frequency using apparatus totally controlled by a computer system. The thermal diffusivity, effusivity as well as thickness of several buried layers are obtained independently through the best fit of experimental data according to the theoretical model. The multilayers of thin metal and alloy film are investigated. This method is proved to be valuable particularly in nondestructive examination of subsurface physical properties. |
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| Keywords: | Photoacoustic detection Multilayer sample Buried properties. |
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