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Interstitial atom energies in graphite

✍ Scribed by P.A. Thrower; R.T. Loader

Publisher: Elsevier Science
Year: 1969
Tongue: English
Weight: 991 KB
Volume: 7
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(69)90078-5

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✦ Synopsis

A theoretical analysis of the free interstitial in graphite has been made using various atomic interaction potential functions with a view to reconciling experimental and theoretical values for the interstitial formation and basal-plane migration energies. Earlier calculations of Coulson et al.[l l] are shown to contain extrapolation errors, and the largest obtainable value of the migration energy is now shown to be around 0.03 eV.

This result is discussed with reference to recently published experimental data on the annealing behaviour of stored energy and thermal resistivity in graphite irradiated at low temperatures, and it is thus concluded that impurity trapping of point defects in graphite is of importance for quite low impurity concentrations at these temperatures.

P. A. THROWER

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