Paper Title:
Diffusion of Hydrogen in the Ni30Ti50Cu20 Shape Memory Alloy
  Abstract

The chemical diffusion coefficient (Dc) of hydrogen in the Ni30Ti50Cu20 shape memory alloy has been determined in the temperature range 700 - 1150 K by investigating the kinetics of H2 absorption. The mobility of H has also been deduced between 250 K and 280 K from a Snoek-type internal friction peak. The values of the Einstein diffusion coefficient (DE) derived from the relaxation time of this peak were in keeping with those of Dc obtained at low H contents (nH = H/Me < 0.01 ). The combined Arrhenius plot of DE and Dc gave the following values for the diffusion parameters: W = 0.52 ± 0.02 eV, D0 = (5±2)x10-4 cm2/s.

  Info
Periodical
Solid State Phenomena (Volume 115)
Edited by
B.M. Darinskii and L.B. Magalas
Pages
51-56
DOI
10.4028/www.scientific.net/SSP.115.51
Citation
G. Mazzolai, A. Biscarini, B. Coluzzi, F. M. Mazzolai, U. Straube, "Diffusion of Hydrogen in the Ni30Ti50Cu20 Shape Memory Alloy", Solid State Phenomena, Vol. 115, pp. 51-56, 2006
Online since
August 2006
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Price
$32.00
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