Characterization of thermal shock damage in a 2D-woven fiber CVI SiC composite using resonant ultrasound spectroscopy

Conference · Tue Dec 31 00:00:00 EST 1996

OSTI ID:530714

Webb, J E; Singh, R N ^[1]; Cari, H; Ferber, M K ^[2]

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1. Univ. of Cincinnati, OH (United States)
2. Oak Ridge National Lab., TN (United States)

Thermal shock damage was generated by a water quench technique in 2-D woven-Nicalon{trademark} fiber chemical vapor infiltrated (CVI) SiC composite bars. In this study, resonant ultrasound spectroscopy (RUS) was used as a nondestructive evaluation (NDE) technique to quantify such damage. RUS spectra were measured for each specimen before and after quenching. The results show a clear correlation between the quench temperature difference ({Delta}T) and changes in the RUS spectra. Both the resonant frequencies and the resonance quality factor decreased with increasing magnitude of {Delta}T, thus, providing quantitative measures for the degree of thermal shock damage.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 530714
• Report Number(s): CONF-9604124-; TRN: 97:003389-0052
• Resource Relation: Conference: 98. annual meeting of the American Ceramic Society, Indianapolis, IN (United States), 14-17 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Ceramic transactions: Advances in ceramic-matrix composites III. Volume 74; Bansal, N.P.; Singh, J.P. [eds.]; PB: 667 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON CARBIDES
THERMAL SHOCK
DAMAGE
CARBON FIBERS
REINFORCED MATERIALS
ULTRASONIC TESTING