Nb30Hf35Ni35–xCox 氢分离合金组织及其渗氢性能

doi:10.3969/j.issn.1007-2861.2014.04.013

上海大学学报(自然科学版) ›› 2015, Vol. 21 ›› Issue (1): 12-19.doi: 10.3969/j.issn.1007-2861.2014.04.013

Nb₃₀Hf₃₅Ni_35–xCo_x 氢分离合金组织及其渗氢性能

梁骁, 郭景杰, 李新中, 苏彦庆, 傅恒志

哈尔滨工业大学材料科学与工程学院, 哈尔滨 150001

收稿日期:2014-12-29 出版日期:2015-02-28 发布日期:2015-02-28
通讯作者: 李新中(1979—), 副教授, 博士生导师, 博士, 研究方向为新型滤氢材料设计与器件开发. E-mail:hitlxz@163.com
基金资助:
国家自然科学基金资助项目(51274077, 51271068); 中央高校基本科研业务费专项资金资助项目(HIT.NSRIF.2013002)

Microstructure evolution and hydrogen permeation performance of Nb₃₀Hf₃₅Ni_35–xCo_x alloys

LIANG Xiao, GUO Jing-jie, LI Xin-zhong, SU Yan-qing, FU Heng-zhi

School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Received:2014-12-29 Online:2015-02-28 Published:2015-02-28

摘要/Abstract

摘要： 通过制备Nb₃₀Hf₃₅Ni_35–xCo_x (x = 0, 5, · · · , 35) 合金, 利用X 射线衍射仪、扫描电子显微镜等设备研究合金相组成和铸态组织随Co 含量的变化规律. 通过在不同温度、压力差条件下进行渗氢实验, 测定各成分合金的渗氢性能, 并分析合金成分和渗氢性能之间的关系. 研究结果表明, 随着Co 含量的增加, 合金中杂质化合物相的含量逐渐降低, 初生bcc-Nb 相的体积分数逐渐减小, 共晶相中的bcc-Nb 相的体积分数逐渐增大, 合金的共晶形态由棒状共晶形态逐渐演变为层片状共晶形态, 且合金的渗氢性能逐渐提高.

关键词: Nb-Hf-Ni-Co 合金, 渗氢性能, 显微组织

Abstract: Nb₃₀Hf₃₅Ni_35–xCo_x (x = 0, 5, · · · , 35) alloys were prepared through tungsten arc-melting. The composition and structure of the alloys was analyzed with scanning electron microscope (SEM) and X-ray diffraction (XRD). Evolution of as-cast structures with the Co content was studied. Hydrogen permeation experiments were conducted at various temperatures and pressure differentials. Relationship between hydrogen permeability and composition of Nb-Hf-Ni (Co) alloys was built. It has been shown that, as the Co content increases, the content of impurities of intermetallic phase in the alloy and volume fraction of the primary bcc-Nb phase gradually reduce, while volume fraction of the bcc-Nb in the eutectic gradually increases. Eutectic morphology changes from rods to lamellas. Hydrogen permeability of the alloys increases with increasing Co content.

Key words: hydrogen permeation, microstructure, Nb-Hf-Ni-Co alloy

中图分类号:

TG 139

梁骁, 郭景杰, 李新中, 苏彦庆, 傅恒志. Nb₃₀Hf₃₅Ni_35–xCo_x 氢分离合金组织及其渗氢性能[J]. 上海大学学报(自然科学版), 2015, 21(1): 12-19.

LIANG Xiao, GUO Jing-jie, LI Xin-zhong, SU Yan-qing, FU Heng-zhi. Microstructure evolution and hydrogen permeation performance of Nb₃₀Hf₃₅Ni_35–xCo_x alloys[J]. Journal of Shanghai University（Natural Science Edition）, 2015, 21(1): 12-19.

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Nb₃₀Hf₃₅Ni_35–xCo_x 氢分离合金组织及其渗氢性能

Microstructure evolution and hydrogen permeation performance of Nb₃₀Hf₃₅Ni_35–xCo_x alloys

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