Ultrasonic Techniques for the Evaluation of Ceramic Joints
Abstract
The increasing use of structural ceramics in high temperature applications has led to the need for nondestructive evaluation techniques to ensure the integrity of the ceramic materials and the quality of joints consisting of ceramics bonded to ceramics or to metals. We describe the development of ultrasonic techniques for the characterization of ceramic materials and for the detection of flaws in these materials and at ceramic joints. This work has led to the ability to determine which face of a 60 micron thick layer of braze filler material is unbonded, thus providing information about the integrity of the ceramic-filler metal bond. We also describe the development of a rapid technique using Lamb waves to probe the bond between alumina coupons in flexure strength specimens, whose geometry makes conventional ultrasonic evaluation of the bond difficult.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1987
- Accession Number
- ADA344743
Entities
People
- R. W. Mcclung
- W. A. Simpson Jr.
Organizations
- Oak Ridge National Laboratory