Effects of Fe on Microstructure and Hydrogen Permeability of Nb44Ti28Ni28 Hydrogen Permeable Alloy

Li Xinzhong; Zhang Le; Zhu Kunjun; Zhang Jinyan

doi:10.15980/j.tzzz.2020.12.001

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Effects of Fe on Microstructure and Hydrogen Permeability of Nb₄₄Ti₂₈Ni₂₈ Hydrogen Permeable Alloy
Vol. 40, Issue 12, Pages: 1309-1313(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.12.001

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[1]李新中,张乐,朱坤军,张锦研.Fe对Nb_(44)Ti_(28)Ni_(28)氢分离合金组织与渗氢性能的影响[J].特种铸造及有色合金,2020,40(12):1309-1313.

Li Xinzhong, Zhang Le, Zhu Kunjun, et al. Effects of Fe on Microstructure and Hydrogen Permeability of Nb₄₄Ti₂₈Ni₂₈ Hydrogen Permeable Alloy. [J]. Special Casting & Nonferrous Alloys 40(12):1309-1313(2020)
[1]李新中,张乐,朱坤军,张锦研.Fe对Nb_(44)Ti_(28)Ni_(28)氢分离合金组织与渗氢性能的影响[J].特种铸造及有色合金,2020,40(12):1309-1313. DOI： 10.15980/j.tzzz.2020.12.001.

Li Xinzhong, Zhang Le, Zhu Kunjun, et al. Effects of Fe on Microstructure and Hydrogen Permeability of Nb₄₄Ti₂₈Ni₂₈ Hydrogen Permeable Alloy. [J]. Special Casting & Nonferrous Alloys 40(12):1309-1313(2020) DOI： 10.15980/j.tzzz.2020.12.001.

摘要

采用电弧感应熔炼制备了Nb

28-x

（x=0

摩尔分数/%）合金

通过X射线衍射仪和扫描电镜（SEM-Quanta 200FEG）对其显微组织进行研究。结果发现

x≤10时

28-x

合金组织由初生相和共晶体组成;x

10时

在亚共晶组织中将析出NbFe相。系统研究了Nb

28-x

（x=0

10）合金的氢溶解、氢渗透和氢扩散性能。结果发现

随Fe含量增加

氢溶解度略有降低

氢渗透性能则先增加后降低;温度在523～673 K时

合金的氢渗透性能最佳

且673 K时约为相同条件下Nb

合金的1.5倍

这主要得益于其氢本征扩散系数的大幅增加。

Abstract

The Nb

28-x

（x=0

15） ingots were prepared by the non-consumable vacuum arc melting. The microstructure of the ingot was analyzed by the scanning electron microscope（SEM-Quanta 200 FEG） and X-ray diffraction analysis. The results reveal that microstructure of Nb

28-x

alloys is composed of the primary phases and eutectics when x≤10

while the NbFe phases are precipitated in the subeutectic structure when x

10. The hydrogen solubility

hydrogen permeability and hydrogen diffusion of Nb

28-x

（x=0

10） alloys were systematically investigated. The results indicate that the hydrogen solubility of alloys is slightly decreased with the increase of Fe content

while the permeability is increased at first and then decreased. The Nb

alloy exhibits the optimal hydrogen permeability at temperatures above 523 K

and it is 1.5 times higher than that of Nb

alloy at 673 K

which mainly benefits from the substantially increase of intrinsic hydrogen diffusion coefficient.