High hydrogen permeability in the Nb-rich Nb-Ti-Ni alloy
High hydrogen permeability in the Nb-rich Nb-Ti-Ni alloy
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DOI：
10.1016/j.jallcom.2005.06.043
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发表时间：
2006-01-05
影响因子：
6.2
通讯作者：
Aoki, K
中科院分区：
文献类型：
--
作者：
Luo, W;Ishikawa, K;Aoki, K
研究了富Nb Nb-Ti-Ni合金，即Nb56Ti23Ni21合金的显微组织和氢渗透性能，并与Nb40Ti30Ni30合金进行了比较。Nb56Ti23Ni21合金由初生相bcc-(Nb，Ti)固溶体和共晶相{bcc-(Nb，Ti)+B2-TiNi}组成。前一相的体积分数为62%，后一相的体积分数为38%。在673K时，Nb56Ti23Ni21合金的PHI值为3.47×10(-8)(molH-2m(-1)S(-1)pa-0.5)，是Nb40Ti30Ni30合金的1.8倍，是Nb-Ti-Ni系中最高的。结果表明，仅由初生相bcc-(Nb，Ti)和共晶相{bcc-(Nb，Ti)+B2-TiNi}组成的富集型Nb-Ti-Ni合金是一种很有前途的氢渗透膜。(C)2005 Elsevier B.V.保留所有权利。
The microstructure and the hydrogen permeability of the Nb-rich Nb-Ti-Ni alloy, i.e., the Nb56Ti23Ni21 alloy were investigated and compared with those of the Nb40Ti30Ni30 alloy. The Nb56Ti23Ni21 alloy consisted of a combination of the primary phase bcc- (Nb, Ti) solid solution with the eutectic phase {bcc- (Nb, Ti) + B2-TiNi}. The volume fraction of the former and the latter phases were 62 and 38 vol.%, respectively. The Nb56Ti23Ni21 alloy showed the higher Phi value of 3.47 x 10(-8) (mol H-2 m(-1) s(-1) Pa-0.5) at 673 K, which is 1.8 times higher than that of the Nb40Ti30Ni30 alloy, which has been reported to be highest in the Nb-Ti-Ni system. The present work demonstrated that the Wrich Nb-Ti-Ni alloys consisting of only the primary phase bcc-(Nb, Ti) and the eutectic phase {bcc-(Nb, Ti) + B2-TiNi} are promising for the hydrogen permeation membrane. (c) 2005 Elsevier B.V. All rights reserved.