Studies of Self-Diffusion in Graphite Using C-14 Tracer
- 1 November 1952
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 23 (11) , 1200-1206
- https://doi.org/10.1063/1.1702031
Abstract
Self‐diffusion in graphite was measured over the temperature range from 1835°C to 2370°C by observing the penetration of C‐14 tracer initially applied to one end of a graphite rod. The experimental data were found to be in agreement with a diffusion mechanism consisting of concurrent volume and grain boundary processes. Activation energies for both processes (EV and EB) could not be uniquely obtained from the data, however. An independent determination of either is required in order to evaluate the other. On the basis of recent theoretical work, EV may be taken to be 90 kcal/mole. From the present experiments and the above value of EV, the activation energy for grain boundary diffusion, EB, is calculated to be 75.4 kcal/mole.This publication has 4 references indexed in Scilit:
- Lattice and Grain Boundary Self-Diffusion in SilverJournal of Applied Physics, 1951
- Calculation of Diffusion Penetration Curves for Surface and Grain Boundary DiffusionJournal of Applied Physics, 1951
- On the disordering of solids by action of fast massive particlesDiscussions of the Faraday Society, 1949
- Pyrometric practice.Published by National Institute of Standards and Technology (NIST) ,1921