Effect of elements addition on hydrogen permeability and ductility of Nb40Ti18Zr12Ni30 alloy
Effect of elements addition on hydrogen permeability and ductility of Nb40Ti18Zr12Ni30 alloy
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DOI：
10.1016/j.jallcom.2007.06.116
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发表时间：
2008-08-11
影响因子：
6.2
通讯作者：
Aoki, Kiyoshi
中科院分区：
文献类型：
--
作者：
Tang, Hui Xiang;Ishikawa, Kazuhiro;Aoki, Kiyoshi
采用电弧熔炼法在纯氩气氛中制备了Nb 40 Ti 18 Zr 12 Ni 25 M5（M=Al，Co，Cu或Pd）合金。采用扫描电镜（SEM）、冷轧和气体渗透技术分别研究了这些合金的显微组织、塑性、氢渗透率（Phi）和氢渗透激活能E-a。虽然Nb 40 Ti 18 Zr 12 Ni 25 Al 5和Nb 40 Ti 18 Zr 12 Ni 25 Pd 5合金在铸态下都是脆性的，但是它们是氢可渗透的。Nb 40 Ti 18 Zr 12 Ni 25 Cu 5和Nb 40 Ti 18 Zr 12 Ni 25 Co 5合金均具有良好的塑性，这对冷轧减薄具有重要意义。在673 K时，Nb 40 Ti 18 Zr 12 Ni 25 Al 5和Nb 40 Ti 18 Zr 12 Ni 25 Co 5合金的Phi（673）（K）值分别为3.73 × 10 ~（-8）和3.82 × 10 ~（-8）[mol H ~（-2）m ~（-1）s ~（-1）Pa ~（-12）]，高于基体合金（Nb 40 Ti 18 Zr 12 Ni 30合金）。另一方面，Cu和Pd对氢渗透性的影响很小。Nb 40 T18 Zr 12 Ni 25 Co 5合金具有最高的氢渗透性、延展性和抗氢脆性。该合金是一种很有前途的透氢膜。(C)2007 Elsevier B. V.保留所有权利。
Nb40Ti18Zr12Ni25M5 (M=Al, Co, Cu or Pd) alloys were prepared by arc melting in a purified argon atmosphere. Microstructures, ductility, hydrogen permeability (Phi) and activation energy E-a for hydrogen permeation of these alloys have been investigated by scanning electron microscopy (SEM), cold-rolling and a gas permeation technique, respectively. Although both Nb40Ti18Zr12Ni25Al5 and Nb40Ti18Zr12Ni25Pd5 alloys were brittle in the as-cast state, they were hydrogen permeable. Both Nb40Ti18Zr12Ni25Cu5 and Nb40Ti18Zr12Ni25Co5 alloys showed good ductility, which was meaningful to decrease the thickness by cold-rolling. The values of Phi(673) (K) for the Nb40Ti18Zr12Ni25Al5 and the Nb40Ti18Zr12Ni25Co5 alloys at 673 K were 3.73 x 10(-8) and 3.82 x 10(-8) [mol H-2 m(-1) s(-1) Pa-1/2], which were higher than that of the base one (Nb40Ti18Zr12Ni30 alloy). On the other hand, Cu and Pd showed little effect on hydrogen permeability. The Nb40T18Zr12Ni25Co5 alloy showed the highest hydrogen permeability, ductility and resistance to the hydrogen embrittlement among the alloys investigated in the present work. This alloy is a promising hydrogen permeable membrane. (C) 2007 Elsevier B.V. All rights reserved.