Ultrasonic Characterization of Ceramic-Ceramic Composites
Ceramic-reinforced ceramic matrix composites are being developed for high temperature, high strength applications such as heat engine components, heat exchangers, and recuperators. The particular material considered here is a SiC-fiber-reinforced SiC matrix composite formed by chemical vapor infiltration (CVI). The initial focus was on porosity, which has been linked to the material strength. Ultrasonic attenuation and velocity were investigated since they were expected to be affected by the porosity in the material.[2–4]
KeywordsUltrasonic Velocity Piezoelectric Transducer Ultrasonic Pulse Ultrasonic Signal Ultrasonic Energy
Unable to display preview. Download preview PDF.
- 1.A. J. Caputo, et al. “Fiber-Reinforced SiC Composites with Improved Mechanical Properties,” Am. Ceram. Soc. Bull. 66, 368 (1987).Google Scholar
- 2.J. H. Rose, “The Effect of Nonspherical Pores and Multiple Scattering on the Ultrasonic Characterization of Porosity,” in Review of Progress in Quantitative NDE, edited by D. O. Thompson and D. E. Chimenti (Plenum Press, New York, 1987), Vol. 6B.Google Scholar
- 3.S. J. Klima, “NDE of Advanced Ceramics,” Materials Evaluation, 44, 571 (1986).Google Scholar
- 4.S.-W. Wang, et al., “Ultrasonic Determination of Porosity in Cast Aluminum,” in Review of Progress in Quantitative NDE, edited by D. O. Thompson and D. E. Chimenti (Plenum Press, New York, 1985), Vol. 4B.Google Scholar