Internal friction of very high purity lead (99.9999%) at medium temperatures

Authors

  • I. Gallego Departamento de Física Aplicada II. Facultad de Ciencias. Universidad del País Vasco.
  • I. Gutiérrez-Urrutia Departamento de Física de la Materia Condensada. Facultad de Ciencias. Universidad del País Vasco.
  • J. M. San Juan Departamento de Física de la Materia Condensada. Facultad de Ciencias. Universidad del País Vasco.
  • M. L. Nó Departamento de Física Aplicada II. Facultad de Ciencias. Universidad del País Vasco.

DOI:

https://doi.org/10.3989/revmetalm.2001.v37.i2.469

Keywords:

Internal friction, High purity lead, Dislocation, Microscopy.

Abstract


Internal friction spectra of high purity lead (99.9999%) at medium temperatures exhibit a main relaxation peak at 230 K (P1) which depends strongly on the dislocation arrangement. The mechanism associated to P1 relaxation has an activation area between 500b2 and 2000b2 and its activation energy is 0.65±0.05 eV (63±5 KJ/mol), which is only 0,6 times the autodiffusion energy of lead. The behaviour of P1 peak and its dependence on thermomechanical treatments has allowed us to conclude that it is associated to the sliding of dislocations controlled by the climbing of jogs by diffusion of vacancies along the dislocation lines. At a slightly higher temperature, another relaxation (P1) turns up in the spectra, which can be associated to different mechanisms.

Downloads

Download data is not yet available.

Downloads

Published

2001-04-30

How to Cite

Gallego, I., Gutiérrez-Urrutia, I., San Juan, J. M., & Nó, M. L. (2001). Internal friction of very high purity lead (99.9999%) at medium temperatures. Revista De Metalurgia, 37(2), 220–224. https://doi.org/10.3989/revmetalm.2001.v37.i2.469

Issue

Section

Articles

Most read articles by the same author(s)

1 2 > >>