Paper Title:
Hydrogen Solubility and Resistance to Hydrogen Embrittlement of Nb-Pd Based Alloys for Hydrogen Permeable Membrane
  Abstract

The alloying effects of Pd on the hydrogen solubility and the resistance to hydrogen embrittlement are investigated for Nb-xmol%Pd-ymol%Zr (x=0~19; y=0, 1) alloys. The hydrogen solubility at 673 K is found to decrease with increasing Pd content in the alloys. Both pure Nb and Nb-Pd alloys possessed ductility in vacuum at 673 K. However, severe hydrogen embrittlement occurs in pure Nb when it is tested under the hydrogen pressure even as low as 0.01 MPa. In view of the small punch (SP) absorption energy, the addition of Pd into Nb improves the resistance to hydrogen embrittlement by decreasing the hydrogen solubility in the alloy, although brittle fracture is still observed in the Nb-15mol%Pd alloy tested under a hydrogen pressure of 0.015 MPa at 673 K.

  Info
Periodical
Advanced Materials Research (Volumes 26 - 28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
873-876
DOI
10.4028/www.scientific.net/AMR.26-28.873
Citation
N. Watanabe et al., 2007, Advanced Materials Research, 26-28, 873
Online since
October 2007
Price
US$ 28,-
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