[1]邓鉴玺,霍尚乐,孙巧艳,等.1400 ℃水蒸气下Cr涂层锆合金氧化失效行为研究[J].中国材料进展,2026,45(11):030-39.
DENG Jianxi,HUO Shangle,SUN Qiaoyan,et al.Oxidation Failure Behavior of Cr-Coated Zirconium Alloys in Steam Environment at 1400 °C[J].MATERIALS CHINA,2026,45(11):030-39.
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1400 ℃水蒸气下Cr涂层锆合金氧化失效行为研究()
中国材料进展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
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45
- 期数:
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2026年11
- 页码:
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030-39
- 栏目:
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- 出版日期:
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2026-10-31
文章信息/Info
- Title:
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Oxidation Failure Behavior of Cr-Coated Zirconium Alloys in Steam Environment at 1400 °C
- 作者:
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邓鉴玺; 霍尚乐; 孙巧艳; 宋忠孝
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西安交通大学，金属材料强度全国重点实验室，陕西 西安 710049
- Author(s):
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DENG Jianxi; HUO Shangle; SUN Qiaoyan; SONG Zhongxiao
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State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
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- 关键词:
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锆合金包壳; 金属Cr涂层; 高温蒸气氧化; 涂层失效; 共晶反应
- Keywords:
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zirconium alloy claddings; metal Cr coating; high temperature steam oxidation; coating failure; eutectic reaction
- 文献标志码:
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A
- 摘要:
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采用磁控溅射工艺在Zr-1Nb合金包壳管表面制备约13 μm的Cr涂层，通过热重分析仪对Cr涂层锆合金进行了1400 ℃水蒸气环境下5-30 min的高温氧化实验并以无涂层试样作为对比。结合EBSD、SEM、EDS和EPMA表征方法，系统性研究了氧化过程中Cr涂层层状结构演变、Cr、Zr、O元素扩散行为和Cr-Zr共晶反应引发的涂层失效机制。研究结果表明：1400 ℃水蒸气环境下，氧化时间从5 min延长至30 min过程中，Cr涂层层状结构由Cr2O3/ZrO2、Cr/ZrO2和Cr-Zr/ZO2三层混合层转变为ZrO2/Cr2O3、ZO2和Cr2O3三层氧化物层结构。超高温下，Cr-Zr 共晶液相的形成引发Cr涂层与Zr基体界面孔洞与涂层剥离，使涂层在5 min 即丧失保护性。超高温下元素剧烈扩散、氧化还原反应与共晶反应的耦合作用，导致Cr涂层锆合金遵循高速线性氧化动力学规律。
- Abstract:
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Cr coating with a thickness of approximately 13 μm was deposited on the surface of Zr-1Nb alloy cladding tubes via magnetron sputtering method. High-temperature oxidation tests of the Cr-coated zirconium alloy were performed for 5 - 30 min in 1400 ℃ steam environment using a thermogravimetric analyzer, with uncoated specimens set as the control group. Combined with characterization techniques including EBSD, SEM, EDS and EPMA, the evolution of the layered structure of the Cr coating, the diffusion behaviors of Cr, Zr and O elements, and the coating failure mechanism induced by the Cr-Zr eutectic reaction during oxidation were systematically investigated. The results demonstrate that as oxidation time extends from 5 min to 30 min in 1400 ℃ steam, the layered structure of the Cr coating transforms from a three-layer mixed structure composed of Cr2O3/ZrO2, Cr/ZrO2 and Cr-Zr/ZrO2 into a three-layer oxide containing of ZrO2/Cr2O3, ZrO2 and Cr2O3. At ultra-high temperatures, the formation of Cr-Zr eutectic liquid phase induces void formation and coating delamination at the Cr coating/Zr substrate interface,resulting in the loss of protective properties of the coating as early as 5 min oxidation. The coupling effect of intense elemental diffusion, redox reaction and eutectic reaction at ultra-high temperatures caused high-rate linear oxidation kinetics of the Cr coated zirconium alloys.
更新日期/Last Update:
2026-09-28