Hydrogen Embrittlement of Metal Membrane Detected by In-situ Measurement under Hydrogen Permeation and Elucidation of Embrittlement Mechanism of Niobium based Metal Membranes

氢渗透下原位测量金属膜氢脆并阐明铌基金属膜脆化机理

• 批准号: 17560624
• 负责人: MATSUMOTO Yoshihisa
• 金额: $ 2.18万
• 依托单位: Oita National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560624/
• 关键词: Hydrogen; Metallic physical properties; Fuel cell; Materials processing and treatment; Hydrogen permeable membrane; Hydrogen embrittlement; Small punch test; Niobium; 水素脆化

This research aims at (1) establishment of the hydrogen embrittlement in-situ measuring method of the metallic hydrogen permeable membranes, (2) elucidation of the effects of dissolved hydrogen on the mechanical properties and (3) suggestion some guidelines of a new metallic membrane design which can be sustainable hydrogen pressure difference. The results are as follows.1. By using a newly developed in-situ small punch apparatus, the mechanism of hydrogen embrittlement of pure niobium metal membrane was investigated under hydrogen permeation.2. The coverage for the ductile-brittle transition of the palladium-coated niobium membrane was determined by a series of the in-situ small punch test and the PCT measurements (Sievert's method). Compared with the one proposed by previous reports, the measured boundary showed great shift to the lower hydrogen content region.3. The membrane was deformed and fractured easily when about 10% lattice contraction was introduced to it by lowering the hydrogen pressure at 673K, at which the dehydrogenation reaction progressed smoothly.4. Although, under the practical hydrogen pressure conditions, pure niobium dissolves a great amount of hydrogen and causes remarkable embrittlement, the reduction of dissolving hydrogen concentration can control the proof hydrogen embrittlement.5. An alloy design planned so as to obtain high hydrogen concentration difference on both sides of the membrane can become a new niobium membrane provided with both hydrogen permeability and strong resistance against hydrogen embrittlement. For instance, when palladium was added to niobium, the amount of dissolved hydrogen decreased, and palladium addition contributed to giving the resistance to hydrogen embrittlement6. The present results will provide us with a clue to the design of niobium-based permeable membrane against the hydrogen embrittlement.

本研究的目的是：(1)建立金属氢透膜的氢脆原位测试方法；(2)阐明溶解氢对金属透氢膜力学性能的影响；(3)提出一种可持续氢压差的新型金属膜设计准则。研究结果如下：1.研究结果。利用新研制的原位小冲孔装置，研究了纯Nb金属膜在氢气渗透作用下的氢脆机理。通过一系列原位小冲孔试验和PCT测量(Sievert方法)，确定了镀钯Nb膜韧脆转变的覆盖率。与以往报道提出的边界相比，测得的边界向氢含量较低的区域移动较大。在673K降低氢气压力，引入约10%的晶格收缩，膜容易发生变形和断裂，此时脱氢反应进展顺利。虽然在实际氢气压力条件下，纯Nb溶解了大量的氢并导致显著的脆化，但降低溶解氢浓度可以控制防止氢脆的发生。设计一种在膜两侧获得高氢浓度差的合金设计，可以成为一种既具有透氢性能又具有很强的抗氢脆性能的新型Nb膜。例如，当钯被加入到Nb中时，溶解的氢量减少，而钯的加入有助于提高氢脆的抗性。这一结果将为设计抗氢脆的Nb基透膜提供线索。

项目成果

Strength property evaluation of pure niobium hydrogen permeable membrane by in-situ SP test

原位SP试验评价纯铌透氢膜的强度性能

• 发表时间: 2006
• 期刊: Collected Abstracts of the 2006 JIM and ISIJ Kyushu Affiliate Joint Meeting(in Japanese) (151)
• 作者: Kazuyuki Shimizu;Shohei Sato;Tomonori Nambu;Hiroshi Yukawa;Yoshihisa Matsumoto
• 通讯作者: Yoshihisa Matsumoto

非Pd系水素透過膜の水素透過能と強度特性

非Pd透氢膜的透氢率和强度特性

• 发表时间: 2006
• 期刊: 大分工業高等専門学校紀要 第43号
• 作者: 松本佳久;清水一行;佐藤翔平;梅田裕太;森迫和宣
• 通讯作者: 森迫和宣

Local Lattice Distortion and Chemical Bonding Nature between Atoms near Hydrogen Atoms in Pure Niobium

纯铌中氢原子附近原子之间的局部晶格畸变和化学键性质

• 发表时间: 2006
• 期刊: Collected Abstracts of the 2006 Autumn Meeting of The Japan Institute of Metals(in Japanese) (83)
• 作者: Tomonori Nambu;Yoshihisa Matsumoto;Hiroshi Yukawa;Masahiko Morinaga
• 通讯作者: Masahiko Morinaga

SP試験による水素透過膜の強度特性評価法

利用SP试验评价透氢膜强度特性的方法

• 发表时间: 2005
• 期刊: 大分工業高等専門学校紀要 第42号
• 作者: 松本佳久;太田航;清水一行;矢野智久
• 通讯作者: 矢野智久

Enhanced hydrogen embrittlement of Pd-coated niobium metal membrane detected by in situ small punch test under hydrogen permeation

• DOI: 10.1016/j.jallcom.2007.02.063
• 发表时间: 2007-10-31
• 期刊: JOURNAL OF ALLOYS AND COMPOUNDS
• 影响因子: 6.2
• 作者: Nambu, T.;Shimizu, K.;Yasuda, I.
• 通讯作者: Yasuda, I.