DETERMINATION OF THE FLEXURAL MODULUS OF THIN-FILMS FROM MEASUREMENT OF THE 1ST ARRIVAL OF THE SYMMETRICAL LAMB WAVE

被引:28
作者
BOBBIN, SE
WAGNER, JW
CAMMARATA, RC
机构
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D O I
10.1063/1.106277
中图分类号
O59 [应用物理学];
学科分类号
摘要
A technique is presented to measure the flexural modulus of free-standing thin metallic films from 1 to 25-mu-m thick. Lamb waves are excited in the film with a pulsed Nd:YAG laser, and detected using heterodyne interferometry. Variability in wave-form structure is observed as a function of experimental parameters and film thickness. The first arrival of the symmetric Lamb mode can be unambiguously identified regardless of wave-form shape, and is used to calculate the flexural modulus.
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页码:1544 / 1546
页数:3
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