Thermal imaging and air-coupled ultrasound characterization of a continuous-fiber ceramic composite panels.
SYLRAMIC{trademark} continuous fiber ceramic-matrix composites (Nicalon{trademark} fiber/SiNC matrix) were fabricated by Dow Corning Corporation with the polymer-impregnation and pyrolysis (PIP) process. The composite microstructure and its uniformity, and the completeness of infiltration during processing were studied as a function of number of PIP cycles. Two nondestructive evaluation (NDE) methods, i.e., infrared thermal imaging and air-coupled ultrasound (UT), were used to investigate flat composite panels of two thicknesses and various sizes. The thermal imaging method provided two-dimensional (2D) images of through-thickness thermal diffusivity distributions, and the air-coupled UT method provided 2D images of through-thickness ultrasonic transmission of the panel components. Results from both types of NDEs were compared at various PIP cycles during fabrication of the composites. A delaminated region was clearly detected and its progressive repair was monitored during processing. The NDE data were also correlated to results obtained from destructive characterization.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 8114
- Report Number(s):
- ANL/ET/CP-94119; TRN: AH200117%%25
- Resource Relation:
- Conference: American Ceramic Society's 22nd Annual Conference and Exposition on Composites, Advanced Ceramics, Materials, and Structures, Cocoa Beach, FL (US), 01/20/1998--01/24/1998; Other Information: PBD: 1 Apr 1998
- Country of Publication:
- United States
- Language:
- English
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