Study of methods for automated crack inspection of electrically poled piezoelectric ceramics.

Yang, Pin ; Hwang, Stephen C. ; Jokiel, Bernhard, Jr. ; Burns, George Robert

Sandia National Laboratories

关键词: Ceramic Materials-Testing.;    Nondestructive Testing;    Piezoelectric Materials.;    36 Materials Science;    Cracks Piezoelectric Materials.;   

DOI  :  10.2172/919173
RP-ID  :  SAND2004-1934
RP-ID  :  AC04-94AL85000
RP-ID  :  919173

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of this project was to identify a viable, non-destructive methodology for the detection of cracks in electrically poled piezoelectric ceramics used in neutron generator power supply units. The following methods were investigated: Impedance Spectroscopy, Scanning Acoustic Microscopy, Lock-in Thermography, Photo-acoustic Microscopy, and Scanned Vicinal Light. In addition to the exploration of these techniques for crack detection, special consideration was given to the feasibility of integrating these approaches to the Automatic Visual Inspection System (AVIS) that was developed for mapping defects such as chips, pits and voids in piezoelectric ceramic components. Scanned Vicinal Light was shown to be the most effective method of automatically detecting and quantifying cracks in ceramic components. This method is also very effective for crack detection in other translucent ceramics.