ULTRASONIC-IMAGING AND CHARACTERIZATION OF SURFACE-BREAKING CRACKS IN SILICON-NITRIDE BY LEAKY RAYLEIGH-WAVES

被引：1

作者：

LEMAITRE, P ^{[1
]}

BUGLINO, V ^{[1
]}

LAKESTANI, F ^{[1
]}

DENIS, R ^{[1
]}

机构：

[1] UNIV PALERMO,DIPARTIMENTO MECCAN & AERONAUT,I-90128 PALERMO,ITALY

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1993年 / 12卷 / 01期

关键词：

D O I：

10.1016/0955-2219(93)90067-2

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The detection, imaging and characterisation of radial cracks, resulting from Vickers indentations in a sintered reaction-bonded silicon nitride, are studied by means of ultrasonic leaky Rayleigh waves. The depth of the cracks investigated varied between 40 and 270 mum. Focusing probes with a nominal frequency of 30 and 75 MHz are used. The obtained C-scan images, which are complicated by the presence of the indents, are discussed. Crack length and crack depth are measured using acoustic methods. The detection and sizing limits are discussed.

引用

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页码：15 / 25

页数：11

共 27 条

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