< back to main site

Publications

Real time evaluation of piezoelectric materials.

Cain, M G; Stewart, M; Gee, M G (1999) Real time evaluation of piezoelectric materials. NPL Report. CMMT(A)149

[img] Text
cmmt149.pdf

Download (832kB)

Abstract

As part of the DTI programme on the development of test methods for characterisation of advanced materials, project CAM 7 Electroactive materials properties under conditions of high stress or stress rate, has the overall aim of defining and improving the measuring framework for electroactive materials which will enable them to be used with greater confidence by UK industry.
This report describes an investigation of the feasibility of developing robust real-time evaluation techniques for the assessment of fatigue of electroceramic materials:
1. The first technique of acoustic emission generation and detection within piezoelectric materials has been successfully demonstrated as a means of assessing internal physical processes occurring in multilayer materials and monolithic materials when driven at high electrical fields.
2. The second method of directly observing microcracks within materials or devices has been investigated. Optical imaging techniques are potantially capable of detecting micro-cracks, greater then 20-30 mm in piezoelectric ceramics.
3. The third technique of thermal imaging to monitor degradation in piezoelectric multilayer devices was not definitive, due to the constraints imposed upon this measurement method by the camera system that was used.
The merits of each technique are described and representative data compared for each method.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMMT(A)149
Subjects: Advanced Materials
Advanced Materials > Functional Materials
Last Modified: 07 Sep 2018 14:22
URI: http://eprintspublications.npl.co.uk/id/eprint/1061

Actions (login required)

View Item View Item