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

Conference · Mon Dec 30 23:00:00 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--
• Country of Publication: United States
• Language: English

Related Subjects

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