TY - JOUR
T1 - 1-3 connectivity composite material made from lithium niobate and cement for ultrasonic monitoring at elevated temperatures
AU - Shepherd, G.
AU - Cochran, A.
AU - Kirk, K.J.
AU - McNab, A.
PY - 2002
Y1 - 2002
N2 - We have designed, manufactured and tested a piezoelectric composite material to operate at temperatures above 400 oC. The material is a 1-3 connectivity composite with pillars of Z-cut lithium niobate in a matrix of alumina cement. The composite material produced shorter pulses than a monolithic plate of lithium niobate and remained intact upon cooling. Results are presented from room temperature and high temperature testing. This material could be bonded permanently to a test object, making it possible to carry out condition monitoring over an extended period. A new excitation method was also developed to enable remote switching between array elements.
AB - We have designed, manufactured and tested a piezoelectric composite material to operate at temperatures above 400 oC. The material is a 1-3 connectivity composite with pillars of Z-cut lithium niobate in a matrix of alumina cement. The composite material produced shorter pulses than a monolithic plate of lithium niobate and remained intact upon cooling. Results are presented from room temperature and high temperature testing. This material could be bonded permanently to a test object, making it possible to carry out condition monitoring over an extended period. A new excitation method was also developed to enable remote switching between array elements.
KW - composites
KW - elevated temperatures
KW - condition monitoring
KW - ultrasonic monitoring
UR - http://dx.doi.org/10.1016/S0041-624X(02)00141-5
U2 - 10.1016/S0041-624X(02)00141-5
DO - 10.1016/S0041-624X(02)00141-5
M3 - Article
SN - 0041-624X
VL - 40
SP - 223
EP - 226
JO - Ultrasonics
JF - Ultrasonics
IS - 1
ER -