Journal of Nuclear Energy Science & Power Generation TechnologyISSN: 2325-9809

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Research Article, J Nucl Ene Sci Power Generat Technol Vol: 6 Issue: 1

Measurement of U diffusion in Nb using alpha-Spectrometry

Perez Rodolfo A1-3*, Gordillo Jorge A1, Iribarren M1,3 and Di Lalla N2
1Gerencia de Materiales, Comisión Nacional de Energía Atómica (CNEA), de Buenos Aires, Argentina
2Consejo Nacional de Investigaciones Científicas y Técnicas- CONICET Avda. Rivadavia, Argentina
3Instituto Sabato-UNSAM/CNEA, San Martín, Argentina
Corresponding author : Rodolfo Ariel Perez
Avenida General Paz 1499, (B1650KNA) San Martín, Pcia. de Buenos Aires, Argentina
Tel: 0054-011-6772-7749
Fax: 0054-011-6772-7362
E-mail: [email protected]
Received: July 12, 2016 Accepted: December 15, 2016 Published: January 10, 2017
Citation: Perez Rodolfo A, Gordillo Jorge A, Iribarren M, Di Lalla N (2017) Measurement of U diffusion in Nb using α-Spectrometry. J Nucl Ene Sci Power Generat Technol 6:1. doi: 10.4172/2325-9809.1000164

Abstract

U bulk diffusion in Nb was measured by mean α-spectrometry in the temperature range 1533 to 1673 K (1260 to 1400°C). Measurements obey the Arrhenius law with diffusion parameters Q = 423 ± 10 KJ/mol and D0 = (2.5 ± 1)×10−4 m2/s very close to the Nb self-diffusion ones found in the literature. This behaviour is compatible with the hypothesis that U diffuses in the Nb lattice via a vacancy mechanism, at the same time it is in disagreement with previous measurements of U diffusion performed at higher temperatures, where the activation energy is significant lower.

Keywords: Diffusion; Metals; Energy materials; α-spectrometry

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