Excitation of the creeping wave by phase velocity scanning of laser interference fringe

Author

Tsukahara, Y. ; Nishino, H. ; Sato, H. ; Yamanaka, K.

Author_Institution

Toppan Tech. Res. Inst., Saitama, Japan

Volume

2

fYear

1996

fDate

3-6 Nov 1996

Firstpage

865

Abstract

In non-destructive evaluation, attention has been paid to the “creeping wave”. The creeping wave can be understood as a longitudinal head wave associated with a transverse wave radiating into a solid which is in contact with a vacuum at a flat interface. The present paper demonstrates a first measurement of 80 MHz creeping waves excited by the scanning interference fringe of the laser irradiation on the free solid surface of sintered silicon nitride, Si₃N₄

Keywords

ceramics; creep; laser beam effects; measurement by laser beam; silicon compounds; sintering; ultrasonic materials testing; wave propagation; 80 MHz; Si₃N₄; creeping wave excitation; flat interface contact; free solid surface; laser interference fringe phase velocity scanning; laser irradiation; laser ultrasonic experiment; nondestructive evaluation; sintered Si₃N₄; transverse wave radiation; vacuum conditions; Interference; Laser beams; Laser excitation; Optical materials; Optical surface waves; Solids; Surface acoustic waves; Surface cracks; Surface emitting lasers; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE

Conference_Location

San Antonio, TX

ISSN

1051-0117

Print_ISBN

0-7803-3615-1

Type

conf

DOI

10.1109/ULTSYM.1996.584130

Filename

584130