Hydrogen Permeable Nb-Based Amorphous Alloys with High Thermal Stability

作者：Ding, H. Y.; Zhang, W.; Yamaura, S. I.; Yao, K. F.^*

来源：Materials Transactions, 2013, 54(8): 1330-1334.

DOI：10.2320/matertrans.MF201310

• amorphous alloy
• niobium-based alloy
• thermal stability
• hydrogen permeation

In this work, the Nb-based Nb42Ni40Co18-xZrx (x = 0, 4, 12) and Nb42Ni32Co6Zr12M8 (M = Ta, Ti, Zr) amorphous alloy ribbons were successfully prepared by single roller melt-spinning technique. These amorphous alloys exhibit high thermal stability with the crystallization temperature (T-x) exceeding 850 K. It has been found that T-x of the Nb42Ni40Co18 alloy decreased with Zr addition, while hydrogen permeability increased linearly with Zr content The hydrogen permeability of the Nb42Ni40Co18, Nb42Ni40Co14Zr4, Nb42Ni40Co6Zr12 and Nb42Ni32Co6Zr20 amorphous alloys at 673 K are 0.03 x 10(-8), 0.23 x 10(-8), 0.69 x 10(-8) and 1.40 x 10(-8) mol.m(-1).s(-1).Pa-1/2, respectively. It is noticed that hydrogen permeability of the Nb42Ni32Co6Zr20 alloy is comparable with that of Pd-23%Ag alloy (1.14 x 10(-8)). Meanwhile, permeability of the above mentioned alloy decreased to 60% of the initial value while it still maintains amorphous structure after 24 h long term durability test. Both thermal stability and hydrogen permeability are enhanced by substituting 8 at% Ni with Ta or Ti in the Nb42Ni40Co6Zr12 alloy. The present result indicates that the Nb-based amorphous alloys possess the potential of applying as a kind of hydrogen permeable membrane at high temperature.

• 出版日期2013-8
• 单位大连理工大学; 清华大学