Title: NDE METHODS FOR CHARACTERIZING STRUCTURAL CERAMIC MATERIALS- DISTRIBUTED PROPERTIES AND SINGLE DEFEKTS

Abstract:
This paper will briefly describe our work on; 1) use of 3D Xray Computed Tomgraphy (CAT scanning) for detection and quantification of density gradients. In monolithic materials, 2) elastic optimal scatter: methods for detection of subsurface/surface cracks in Si³ N ⁴ ceramics, 3) fluorescent penetrant methods for damson of surface-breaking cracks in monolithic ceramics and 4) thermal imaging methods for characterizing thermal properties of Continuous Fiber Ceramic Gabby Composites (CFCC). Each NDE method will be briefly described as well as the status. Results of applying each of these methods to actual ceramic components, eg., turbo rotors, ball bearings, turbine blades, and turbine combustors will be presented. Work Sponsored by the US Department of Energy; Office of Conservation and Renewable Resources / Transportation Systems / Materials Program and Office of Industrial Technologies / CFCC and Advanced. Turbine Systems programs as well as US Department of Defense / DARPA-DSO.
(Ref. SXVIII-009-97)

Source: NDE of Ceramics '97 May 4-7, Symposium on Nondestructive Evaluation of Ceramics at the American Ceramic Society 99th Annual Meeting, Cincinnati, Ohio.
Buying the Symposium Proceedings from the American Ceramic Society.