Paper Title:

Hydrogen Solubility and Resistance to Hydrogen Embrittlement of Nb-Pd Based Alloys for Hydrogen Permeable Membrane

Periodical Advanced Materials Research (Volumes 26 - 28)
Main Theme Advanced Materials and Processing
Edited by Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages 873-876
DOI 10.4028/
Citation N. Watanabe et al., 2007, Advanced Materials Research, 26-28, 873
Online since October 2007
Authors N. Watanabe, G. Zhang, Hiroshi Yukawa, Masahiko Morinaga, T. Nambu, K. Shimizu, S. Sato, K. Morisako, Yoshihisa Matsumoto, Isamu Yasuda
Keywords Hydrogen Embrittlement, Hydrogen Permeable Membrane, Hydrogen Solubility, Niobium Based Alloy, Small Punch Test
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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.