Nb 对氢在 Fe-13Cr-6Al-2Mo 合金中扩散行为的作用

doi:10.12066/j.issn.1007-2861.2236

上海大学学报(自然科学版) ›› 2022, Vol. 28 ›› Issue (1): 111-120.doi: 10.12066/j.issn.1007-2861.2236

Nb 对氢在 Fe-13Cr-6Al-2Mo 合金中扩散行为的作用

马星星, 陈业新(), 张华伟

上海大学材料研究所, 上海 200072

收稿日期:2019-12-16 出版日期:2022-02-28 发布日期:2020-09-06
通讯作者: 陈业新 E-mail:yxchen@shu.edu.cn
作者简介:陈业新(1958—), 男, 研究员, 博士生导师, 博士, 研究方向为材料中的氢行为、相变等. E-mail: yxchen@shu.edu.cn
基金资助:
国家自然科学基金资助项目(51271102)

Effects of Nb on hydrogen diffusion in Fe-13Cr-6Al-2Mo alloys

MA Xingxing, CHEN Yexin(), ZHANG Huawei

Institute of Materials, Shanghai University, Shanghai 200072, China

Received:2019-12-16 Online:2022-02-28 Published:2020-09-06
Contact: CHEN Yexin E-mail:yxchen@shu.edu.cn

摘要/Abstract

摘要：

采用电化学氢渗透方法研究氢原子在 Fe-13Cr-6Al-2Mo 和 Fe-13Cr-6Al-2Mo-0.5Nb 合金中的扩散行为, 分析了 0.5%Nb(质量分数, 下同)对氢原子在 Fe-13Cr-6Al-2Mo 合金中扩散行为的作用. 研究结果表明: 当在 Fe-13Cr-6Al-2Mo 合金中添加 0.5%Nb 后, 合金的晶粒得到细化, 同时合金中析出大量弥散分布的细小 Fe$_{2}$Nb 相. 0.5%Nb 的添加大幅度降低了氢原子在 Fe-13Cr-6Al-2Mo 合金中的表观扩散系数, 使氢原子在合金中的扩散激活能提高了 50.3%. Nb 原子通过提高合金中的氢陷阱浓度, 有效降低了氢原子在 FeCrAlMo 基合金中的扩散速率.

关键词: FeCrAl 基合金, 氢陷阱, 氢扩散系数

Abstract:

In this study, the diffusion behaviors of hydrogen atoms in Fe-13Cr-6Al-2Mo and Fe-13Cr-6Al-2Mo-0.5Nb alloys were studied by the electrochemical hydrogen permeation method. The effects of 0.5% Nb (mass fraction) added to the alloy on the diffusion behavior of hydrogen atoms in the Fe-13Cr-6Al-2Mo alloy were analyzed. Results showed that the grain of the alloy was refined, and a large amount of fine Fe$_2$Nb phase was dispersed in the Fe-13Cr-6Al-2Mo alloy when 0.5% Nb was added. The results also showed that 0.5% Nb greatly reduced the apparent diffusion coefficient of hydrogen in the Fe-13Cr-6Al-2Mo alloy and increased the diffusion activation energy of hydrogen in the alloy by 50.3%. The Nb atom effectively reduced the diffusion rate of hydrogen in the FeCrAlMo-based alloy by increasing the hydrogen trap concentration in the alloy.

Key words: FeCrAl-based alloy, hydrogen trap, hydrogen diffusion coefficient

中图分类号:

TG142

马星星, 陈业新, 张华伟. Nb 对氢在 Fe-13Cr-6Al-2Mo 合金中扩散行为的作用[J]. 上海大学学报(自然科学版), 2022, 28(1): 111-120.

MA Xingxing, CHEN Yexin, ZHANG Huawei. Effects of Nb on hydrogen diffusion in Fe-13Cr-6Al-2Mo alloys[J]. Journal of Shanghai University（Natural Science Edition）, 2022, 28(1): 111-120.

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Nb 对氢在 Fe-13Cr-6Al-2Mo 合金中扩散行为的作用

Effects of Nb on hydrogen diffusion in Fe-13Cr-6Al-2Mo alloys

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