Development of nondestructive evaluation methods for structural ceramics
- Argonne National Lab., IL (United States). Energy Technology Div.
- Heaviside Science, Inc., Melbourne, FL (United States)
- 3M Corp., St. Paul, MN (United States)
Development of nondestructive evaluation (NDE) methods for application to fossil energy systems continues in three areas: (a) mapping axial and radial density gradients in hot gas filters, (b) characterization of the quality of continuous fiber ceramic matrix composite (CFCC) joints and (c) characterization and detection of defects in thermal barrier coatings. In this work, X-ray computed tomographic imaging was further developed and used to map variations in the axial and radial density of two full length (2.3-m) hot gas filters. The two filters differed in through wall density because of the thickness of the coating on the continuous fibers. Differences in axial and through wall density were clearly detected. Through transmission infrared imaging with a highly sensitivity focal plane array camera was used to assess joint quality in two sets of SiC/SiC CFCC joints. High frame rate data capture suggests that the infrared imaging method holds potential for the characterization of CFCC joints. Work to develop NDE methods that can be used to evaluate electron beam physical vapor deposited coatings with platinum-aluminide (Pt-Al) bonds was undertaken. Coatings of Zirconia with thicknesses of 125 {micro}m (0.005 in.), 190 {micro}m (0.0075 in.), and 254 {micro}m (0.010 in.) with a Pt-Al bond coat on Rene N5 Ni-based superalloy were studied by infrared imaging. Currently, it appears that thickness variation, as well as thermal properties, can be assessed by infrared technology.
- Research Organization:
- Argonne National Lab., Energy Technology Div., IL (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 672095
- Report Number(s):
- ANL/ET/CP-94434; CONF-9705115-; ON: DE97054325; TRN: AHC2DT07%%255
- Resource Relation:
- Conference: 11. annual conference on fossil energy materials, Knoxville, TN (United States), 20-22 May 1997; Other Information: PBD: Jun 1997
- Country of Publication:
- United States
- Language:
- English
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