Nitrogen Diffusion in the Nb-1.0wt%Zr Measured by Mechanical Spectroscopy

Abstract:

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The scientific and technological development in the area of new materials contributed to several applications of niobium and its alloys in nuclear power plants as well as in aerospace, aeronautics, automobile and naval industries. This paper presents the interstitial diffusion coefficients of nitrogen in solid solution in the Nb-1.0wt%Zr alloy using internal friction measurements obtained by mechanical spectroscopy, which uses a torsion pendulum operating at an oscillation frequency between 1.0 Hz and 10.0 Hz. The temperature range varies from 300K to 700K, at a heating rate of 1 K/min and vacuum better than 2 x 10-6 Torr. The results showed an increase of the interstitial diffusion coefficient of nitrogen that was correlated with configurational considerations for the octahedral interstitials.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 273-276)

Edited by:

Andreas Öchsner and Graeme E. Murch

Pages:

261-265

DOI:

10.4028/www.scientific.net/DDF.273-276.261

Citation:

A. C. Souza et al., "Nitrogen Diffusion in the Nb-1.0wt%Zr Measured by Mechanical Spectroscopy", Defect and Diffusion Forum, Vols. 273-276, pp. 261-265, 2008

Online since:

February 2008

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Price:

$35.00

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