ICIFUAS 11
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids

J. Phys. IV France 06 (1996) C8-361-C8-364
DOI: 10.1051/jp4:1996878

Mechanical Spectroscopy in Nitrogen Implanted Copper

O.A. Lambri^{1, 2}, E.D. Bulejes¹, A.V. Morón Alcain¹, A.R. Saurit¹, G. Sánchez^{3, 4} and J. Feugeas<sup>3

1</sup>  Laboratorio de Espectroscopía Mecánico Dinámica, Instituto de Física Rosario (CONICET-UNR), Avda. 27 de febrero 210 bis, 2000 Rosario, Argentina
²  Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad del País Vasco, Apdo. 644, 48080 Bilbao, Spain
³  Laboratorio de Física de Plasmas, Universidad Nacional de Rosario, Departamento de Física, Avda. Pellegrini 250, 2000 Rosario, Argentina
⁴  Instituto de Física, Universidad Federal de Río Grande do Sul, Avda. Bento Gonçalves 9500, CP. 15051, 91501-970 Porto Alegre RS, Brazil

Abstract
The effects of nitrogen irradiation employing a plasma focus device on high purity polycrystalline copper are shown. It should be pointed out, that the effects of implantation process depend strongly of the previous thermal state of the sample. In fact, a new damping peak at approximately 750 K appears in irradiated samples which were previously annealed during 1 hour at 1073 K, but neither new peak at 750 K was measured in samples previously annealed during 5 and 15 hours. However other new peak appears at 1000 K. Moreover in the first case non hysteresis effects between a run up and down in temperature were found in both damping and modulus, but in the second one strong hysteresis effects appeared.

© EDP Sciences 1996