| 引用本文: | 陈修,孙博林,杨波,陈小亮,史晓斌,任伟,高恒,宋广生.氢分离合金Nb-Ti-Zr调幅分解组织及渗氢性能研究[J].材料科学与工艺,2025,33(3):38-46.DOI:10.11951/j.issn.1005-0299.20230208. |
| CHEN Xiu,SUN Bolin,YANG Bo,CHEN Xiaoliang,SHI Xiaobin,REN Wei,GAO Heng,SONG Guangsheng.Study on spinodal decomposition microstructure and hydrogen permeation performance of Nb-Ti-Zr hydrogen separation alloys[J].Materials Science and Technology,2025,33(3):38-46.DOI:10.11951/j.issn.1005-0299.20230208. |
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| 氢分离合金Nb-Ti-Zr调幅分解组织及渗氢性能研究 |
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陈修1,孙博林1,4,杨波1,陈小亮1,史晓斌1,任伟2,3,高恒3,宋广生1
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(1.安徽工业大学 材料科学与工程学院,安徽 马鞍山 243032;2.省部共建高品质特殊钢冶金与制备国家重点实验室(上海大学) ,上海 200444;3.上海大学 理学院,上海 200444;4.广东工业大学 材料与能源学院,广州 510006)
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| 摘要: |
| 为解决纯Nb在渗氢过程中易氢脆的问题,迫切需要开发兼具高渗氢效率和抗氢脆性能的单相铌基固溶体氢分离合金。本文选取单相Nb-Ti-Zr三元合金系通过真空非自耗电弧炉制备出Nb40Ti55Zr5和Nb50Ti40Zr10合金,采用SEM、XRD、TEM等测试方法对铸态合金的显微结构进行表征,利用三点弯曲试验机、四辊轧制机、氢渗透测试仪和Sievert吸氢装置测试铸态合金塑性变形性能及在不同温度和氢压下的渗氢性能。研究表明:铸态Nb40Ti55Zr5合金为等轴晶的单相固溶体合金,而铸态Nb50Ti40Zr10合金为多晶凝固及后续固态调幅分解组织。相比之下, Nb50Ti40Zr10合金不仅拥有优异的塑性变形能力,同时由于发生调幅分解而降低了Nb中固溶吸氢元素Ti、Zr的含量,进而促进氢溶解度的降低和氢扩散系数的提高,且在673 K下的氢渗透率达到3.50×10-8mol/(m·s·Pa1/2),是纯Pd氢渗透率的2.1倍,并且冷至室温仍保持膜的完整性,具有较好的氢渗透率和抗氢脆性能。 |
| 关键词: Nb-Ti-Zr 氢分离合金膜 微观组织 调幅分解 渗氢性能 |
| DOI：10.11951/j.issn.1005-0299.20230208 |
| 分类号:TG146.4 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51875002)；省部共建高品质特殊钢冶金与制备国家重点实验室、上海市钢铁冶金新技术开发应用重点实验室开放课题项目(SKLASS 2022-13)；上海市科学技术委员会项目(19DZ2270200)；先进金属材料绿色制备与表面技术教育部重点实验室开放课题基金资助项目(GFST2022KF08). |
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| Study on spinodal decomposition microstructure and hydrogen permeation performance of Nb-Ti-Zr hydrogen separation alloys |
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CHEN Xiu1, SUN Bolin1,4, YANG Bo1, CHEN Xiaoliang1, SHI Xiaobin1, REN Wei2,3, GAO Heng3, SONG Guangsheng1
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(1.School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243032,China; 2.State Key Laboratory of Advanced Special Steel (Shanghai University), Shanghai 200444, China;3.Collegeof Sciences, Shanghai University, Shanghai 200444, China; 4. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China)
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| Abstract: |
| Niobium (Nb) alloy is considered to be the most potential hydrogen separation metal membrane material to replace Pd due to its low cost and high hydrogen permeability. In order to solve the problem of hydrogen embrittlement of pure Nb in the process of hydrogen permeation, there is an urgent need to develop Nb-Ti-Zr single-phase hydrogen separation alloy with high hydrogen permeability and hydrogen embrittlement resistance. In this paper, Nb40Ti55Zr5 and Nb50Ti40Zr10 alloys for hydrogen separation were prepared by vacuum non-consumable arc furnace. The microstructure of the as-cast alloys was characterized by SEM, XRD and TEM. The formability and hydrogen permeation properties of the as-cast alloys at different temperatures and hydrogen pressures were tested by a three-point bending tester, a four-roll rolling machine,a hydrogen permeation tester and a Sievert hydrogen absorption device. The results show that the as-cast Nb40Ti55Zr5 alloy is an equiaxed single-phase solid solution alloy, while the as-cast Nb50Ti40Zr10 alloy exhibits polycrystalline solidification and subsequent spinodal decomposition microstructure. In contrast, Nb50Ti40Zr10 alloy not only has excellent plastic deformation ability, but also reduces the content of solid solution hydrogen absorbing elements Ti and Zr in Nb due to the spinodal decomposition, which helps to reduce hydrogen solubility and improve hydrogen diffusion coefficient. Moreover, the hydrogen permeability at 673 K reached 3.50×10-8 mol/(m·s·Pa1/2), which was 2.1 times higher than that of pure Pd. Furthermore, the integrity of the membrane was still maintained at room temperature, with good hydrogen permeability and hydrogen brittleness resistance. |
| Key words: Nb-Ti-Zr Hydrogen separation alloy membrane microstructure spinodal decomposition hydrogen permeability |
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