Highly oriented massive pyrolytic carbons were acnealed at, 2900-3300ยฐC to produce apparent crystalline heights (L,) ranging from 220 A to 1660 A. Transmission electron microscopy showed that annealing progressively increased the crystallite width, while the height between twist boundaries was littl
Interpretation of high-temperature irradiation behavior in carbons and graphites
โ Scribed by G.B. Engle; J.C. Bokros
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 139 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0008-6223
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๐ SIMILAR VOLUMES
observed etch-patterns seem to have no relation with the dislocation content of the crystals. The imphcations are discussed.
ABSTRACTS pitch content reduced the total porosity but increased the closed porosity. These alterations in structure produced attendant changes in the anisotropy of the compacts; higher pitch contents produced a more isotropic material.
The linear dimensional changes of anisotropic and near-isotropic graphites were measured after irradiation in the range 300 to 1500ยฐC to 3.3 x 102r n/cm" (E > 0.18 MeV). The presence of a nongraphitizing impregnant coke in an anisotropic needle-coke graphite increased its volume contraction, reduced