セラミックス多孔体の超音波伝ぱメカニズム : 第2報,理論の検証実験

概要

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For the purpose of developping an ultrasonic method to nondestructively evaluate micro pores in ceramics, we have been studying the propagation mechanism of ultrasound in ceramics. In the first report, we proposed a theory of propagation of ultrasound based on a probabilistic new idea. In this second report, preparing alumina ceramics with different pore distributions, we verfied our theory experimentally. The experimental results proved our theory that the ultrasonic waveform propagating through porous ceramics is determined by the convolution integral of Gaussian function and the waveform propagating through non-porous ceramics. This new finding made the quantitative relationships clear between ultrasonic waveforms and pore distributions (porosity, pore size and pore shape), which enables us to nondestructively predict the porosities and mean pore sizes in ceramics.
一般社団法人日本機械学会の論文
1994-09-25