Mecanismos de movilidad de dislocaciones a temperaturas medias en plomo de muy alta pureza (99.9999 %)
- Gallego, I. 1
- Nó, M. L. 1
- San Juan, J. 2
- 1 Dpto. de Física Aplicada II. Fac. de Ciencias. Univ. del País Vasco
- 2 Dpto. de Física de la Materia Condensada. Fac. de Ciencias, Univ. del País Vasco
ISSN: 0034-8570
Year of publication: 1998
Volume: 34
Issue: 0
Pages: 238-242
Type: Article
More publications in: Revista de metalurgia
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Abstract
The internal friction spectrum of high purity lead (99.9999 %) at medium temperatures has been studied. A new peak (P1) has been found at 240 K, which has not been studied up to now. The activation energy of the process associated with F, has been determined and its experimental behaviour has also been systematically studied. The comparison between the results and the theoretical predictions of the models of dislocation mobility allows us to attribute the P1 peak to the sliding of dislocations, controlled by the climbing of jogs induced by the diffusion of vacancies along the dislocation line. This conclusion is analogue to that obtained in previous works for the P1v peak in very high purity aluminium (99.9999 %).