セラミックス複合材料の超音波伝ぱ速度に及ぼす気孔率およびセラミックス成分比の影響

概要

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In this study, we investigated the propagation of ultrasonic waves in ceramic composite. Providing some samples of Al_2O_3 ceramics, ZrO_2 ceramics and Al_2O_3/ZrO_2 composite with different Al_2O_3 content, the effects of both pores and Al_2O_3 particles on the ultrasonic velocity (P wave speed) were examined. Resulting from the ultrasonic tests, the following facts were revealed : (1) In the porosity range below 20%, the ultrasonic propagation time increases in proportional to the porosity. (2) The ultrasonic propagation time decreases linearly with the increase in volume fraction of Al_2O_3 (3) The ultrasonic velocity is independent of the particle size of Al_2O_3 powder. We derived the relationship equations among ultrasonic velocity. Al_2O_3 content and porosity.
一般社団法人日本機械学会の論文
1999-08-25