A simplified ultrasonic immersion technique for materials evaluation
A simplified ultrasonic immersion technique for materials evaluation
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DOI：
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发表时间：
1998
影响因子：
0.6
通讯作者：
D. Xiang;N. Hsu;G. Blessing
中科院分区：
文献类型：
--
作者：
D. Xiang;N. Hsu;G. Blessing
本文提出了一种简化的超声浸没技术，利用专门设计的无透镜、线聚焦、大孔径、短焦距的聚偏氟乙烯（PVDF）换能器测量固体材料中的漏表面波和体波。基于一种简单的方法，该技术为这些波类型提供了精确的速度测量，从中可以确定材料特性，如弹性模量。定向漏波测量与这种技术已被用来检测材料的各向异性，以及确定表面裂纹的深度和方向。利用该技术还测量了等离子喷涂条件对具有粗糙表面和多孔微观结构的喷涂陶瓷涂层的声学性能的影响。
A simplified ultrasonic immersion technique has been developed to measure leaky surface and bulk waves in solid materials by using specially designed lensless, line-focus polyvinylidene fluoride (PVDF) transducers with a large aperture and a short focal distance. Based on a simple methodology, this technique offers precise velocity measurements for these wave types, from which material properties, such as the elastic moduli, can be determined. Directional leaky wave measurements with this technique have been used to detect material anisotropy, as well as to determine the depth and orientation of a surface crack. The effects of plasma-spray conditions on the acoustic properties of sprayed ceramic coatings possessing rough surfaces and porous microstructures have also been measured using this technique.