ULTRASONIC ATTENUATION IN CARBON-CARBON COMPOSITES AND THE DETERMINATION OF POROSITY.

B. R. Tittmann, B. Hosten, M. Abdel-Gawad

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ultrasonic spectroscopy together with optical microscopy were used to study the distribution of porosity in two-dimensional carbon-carbon composites. In the frequency-dependent (0. 5-3. 0 MHz) attenuation, characteristic features are found which lead to separate estimates of mean size and volume fraction of pores. Four samples of two-dimensional carbon-carbon composites were studied, corresponding to each of four key steps in the fabrication process. A method was developed to analyze the data. A correlation between the degree of porosity and ultrasonic attenuation was found in qualitative agreement with theory. The absence of quantitative agreement is thought to be a result of nonideal (nonspherical) geometry of the pores.

Original languageEnglish (US)
Pages (from-to)1047-1050
Number of pages4
JournalUltrasonics Symposium Proceedings
StatePublished - 1986

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Carbon carbon composites
Porosity
Ultrasonics
Optical microscopy
Volume fraction
Spectroscopy
Fabrication
Geometry

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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ULTRASONIC ATTENUATION IN CARBON-CARBON COMPOSITES AND THE DETERMINATION OF POROSITY. / Tittmann, B. R.; Hosten, B.; Abdel-Gawad, M.

In: Ultrasonics Symposium Proceedings, 1986, p. 1047-1050.

Research output: Contribution to journalArticle

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AU - Tittmann, B. R.

AU - Hosten, B.

AU - Abdel-Gawad, M.

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