Study on the formation of bulk Zr hydride and fracture behavior analysis

块状Zr氢化物的形成研究及断裂行为分析

• 批准号: 17360459
• 负责人: UNO Masayoshi
• 金额: $ 9.28万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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/grant/KAKENHI-PROJECT-17360459/
• 关键词: metal hydride; zirconium; deformation analysis; light water reactor fuel cladding; delayed hydride cracking; finite element analysis; チタン; イットリウム; 水素固溶体; 物理化学的性質; 機械的性質

This report summarizes the study on the formation of bulk Zr hydride and fracture behavior analysis.In the first part, the preparation methods for bulk Zr, Ti and Y hydride and hydrogen solid solution without defects were developed and the physicochemical and mechanical properties were measured. They have respectively unique physico-chemical properties, and that the properties for the zirconium metal and hydrides have similar properties to the titanium and yttrium metals and hydrides, since such properties for these hydrides are ruled by the electronegativity.In the second part PEC properties of oxide film of Zr-Nb alloy with or without hydrogen were studied, and the distribution of the impurity level induced by hydrogen charging was discussed. The band gap energy of all the samples was consistent with that of ZrO2 film. The terminal solid solubility of hydrogen (TSS) for pure Zr, Zr-Nb binary alloys with different Nb concentrations, and Nb added Zircaloy-4 was examined. The TSS of the a single-phase Zr-0.3Nb (Zr-0.3 wt% Nb) specimen appeared to be almost same as that of pure Zr.In the third part, the hydrogen diffusion behavior near the crack tip was simulated by FEM using ABAQUS ver.6.5. The hydrogen quickly redistributed according to the stress distribution. The hydrogen concentration at the crack tip increased more than 10 % within one second in most situations. The crack growth rate was discussed from the results.

本文综述了锆氢化物的形成和断裂行为分析的研究进展：第一部分，发展了无缺陷锆、钛、钇氢化物和氢固溶体的制备方法，并测试了其物理化学和力学性能。它们具有各自独特的物理化学性质，而金属锆和钇的性质与钛、钇和钇的性质相似，因为它们的性质是由电负性决定的。第二部分研究了Zr-Nb合金氧化膜在充氢和不充氢时的光电转换特性，并讨论了充氢引起的杂质能级的分布。所有样品的带隙能量与ZrO 2薄膜的带隙能量一致。研究了纯Zr、不同Nb含量的Zr-Nb二元合金和添加Nb的Zr-4合金的氢的终固溶度。单相Zr-0.3Nb（Zr-0.3wt%Nb）试样的TSS与纯Zr试样的TSS几乎相同。第三部分利用有限元软件ABAQUS ver.6.5模拟了氢在裂纹尖端附近的扩散行为。根据应力分布，氢迅速重新分布。在大多数情况下，裂纹尖端的氢浓度在一秒内增加超过10%。根据计算结果对裂纹扩展速率进行了讨论。

项目成果

Photoelectrochemical study of hydrogen in oxide films of Zr based alloys for fuel cladding materials of light water reactors

轻水堆燃料包壳材料锆基合金氧化膜中氢的光电化学研究

• 发表时间: 2007
• 期刊: Journal of Alloys and Compounds
• 影响因子: 6.2
• 作者: Masayoshi Uno;Kazuo Takahashi;Toru Nakayama;Shinsuke Yamanaka
• 通讯作者: Shinsuke Yamanaka

Electrical and thermal properties of titanium hydrides

• DOI: 10.1016/j.jallcom.2005.10.032
• 发表时间: 2006-08
• 期刊: Journal of Alloys and Compounds
• 影响因子: 6.2
• 作者: Masato Ito;D. Setoyama;J. Matsunaga;H. Muta;K. Kurosaki;M. Uno;S. Yamanaka

Photoelectrochemical properties and band structure of oxide films on zirconium-transition metal alloys

锆过渡金属合金氧化膜的光电化学性能和能带结构

• 发表时间: 2006
• 期刊: J. Alloys and Compounds 421
• 作者: Kazuo Takahashi;Masayoshi Uno;Mihoko Okui;Shinsuke Yamanaka
• 通讯作者: Shinsuke Yamanaka

Effect of electronegativity on the mechanical properties of metal hydrides with a fluorite structure

• DOI: 10.1016/j.jallcom.2006.02.036
• 发表时间: 2006-12
• 期刊: Journal of Alloys and Compounds
• 影响因子: 6.2
• 作者: Masato Ito;D. Setoyama;J. Matsunaga;H. Muta;K. Kurosaki;M. Uno;S. Yamanaka