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Hydrogen diffusion and solubility in pyrolytic carbon

✍ Scribed by R.A. Causey; T.S. Elleman; K. Verghese

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
568 KB
Volume
17
Category
Article
ISSN
0008-6223

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✦ Synopsis

Tritium diffusion coefficients and deuterium solubilities have been measured for laminar pyrolytic carbon in the temperature range !90@-1500Β°C. The tritium diffusion coefficients were much lower than those for metals at equivalent temperatures, but the activation energy for the diffusion was much higher (-100 kcal/mole). Tritium diffusion coefficients measured for silicon-doped pyrolytic carbon were over an order of magnitude higher than the values for the undoped laminar pyrolytic carbon. The solubility of deuterium in laminar pyrolytic carbon was found to decrease with increasing temperature and exhibited a pressure dependence of pi'*. l.l.NTRODtJCTlON

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160. Diffusion and migration of uranium
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✍ W.V Goeddel; H.K Lonsdale; N.L Sandefur πŸ“‚ Article πŸ“… 1964 πŸ› Elsevier Science 🌐 English βš– 98 KB

Using U 232 as a tracer, self diffusion coefficients have been obtained as a function of temperature in three varieties of graphite. Measurements were made in the (c) and (a) directions in pyrographite, in 2.T.A.f (p=2.12) and a porous graphite (p== 1X1)1. The determinations spanned at least 400Β°C i