Material damping studies on carbon-carbon composites
β Scribed by U.K. Vaidya; P.K. Raju; W. Kowbel
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 685 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0008-6223
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The work-of-fracture (ywOF) of carbon-carbon composites was measured for composites with 3-D woven fiber preforms, carbon felts, and chopped fibers. Maximum values were observed for the 3-D preforms and minimum values for the carbon felts. The values are also compared with similar data for graphites
Electron-nuclear double resonance (ENDOR) spectra have been obtained at the free proton frequency for a carbon black and a carbon black-polymer composite, at temperatures ranging from 130 K to 350 K. The ENDOR spectra show an unusual dependence on the saturation of the associated homogeneously broad