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）建立金属氢渗透膜的氢脆原位测量方法，（2）阐明溶解氢对机械性能的影响，以及（3）为可持续氢压差的新型金属膜设计提供一些指导。结果如下： 1．利用新研制的原位小冲孔装置，研究了纯铌金属膜在氢渗透下的氢脆机理。 2．通过一系列原位小冲头测试和 PCT 测量（Sievert 法）确定了镀钯铌膜的延性-脆性转变的覆盖范围。与以往报道提出的边界相比，测量边界明显向氢含量较低的区域偏移。 3．当氢气压力降低至673K时，膜发生10%左右的晶格收缩，膜容易变形、断裂，此时脱氢反应顺利进行。 4．虽然在实际氢压条件下，纯铌会溶解大量的氢而引起显着的脆化，但降低溶解氢浓度可以控制氢脆的发生。 5．通过合金设计，使膜两侧获得高的氢浓度差，可以成为兼具氢渗透性和强抗氢脆性的新型铌膜。例如，当将钯添加到铌中时，溶解氢的量减少，并且添加钯有助于赋予耐氢脆性6。本研究结果将为我们设计抗氢脆铌基渗透膜提供线索。

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.