纯铜表面Ti/Ta复合涂层的制备及性能

doi:10.13251/j.issn.0254-6051.2023.12.035

金属热处理 ›› 2023, Vol. 48 ›› Issue (12): 206-212.DOI: 10.13251/j.issn.0254-6051.2023.12.035

纯铜表面Ti/Ta复合涂层的制备及性能

吕绪明¹, 高泽宇^2,3, 魏东博^2,3, 胡玉锦^2,3, 杨凯^2,3, 张平则^2,3

1.核工业理化工程研究院粒子输运与富集技术国防科技重点实验室, 天津 300180;
2.南京航空航天大学材料科学与技术学院, 江苏南京 211106;
3.面向苛刻环境的材料制备与防护技术工业和信息化部重点试验室, 江苏南京 211106

收稿日期:2023-08-03 修回日期:2023-11-05 出版日期:2023-12-25 发布日期:2024-01-29
通讯作者: 魏东博,副教授,博士,E-mail: weidongbo@nuaa.edu.cn
作者简介:吕绪明(1986—),男,高级工程师,博士,主要研究方向为金属材料表面工程,E-mail: lvxuming2008@126.com。
基金资助:
中国原子能燎原计划(YZNLY-22631);南京航空航天大学中央高校基本科研业务费(NT2022019)

Preparation and properties of Ti/Ta composite coating on pure copper surface

Lü Xuming¹, Gao Zeyu^2,3, Wei Dongbo^2,3, Hu Yujin^2,3, Yang Kai^2,3, Zhang Pingze^2,3

1. Science and Technology on Particle Transport and Separation Key National Defense Laboratory, Research Institute of Physical and Chemical Engineering of Nuclear Industry, Tianjin 300180, China;
2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing Jiangsu 211106, China;
3. Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology, Nanjing Jiangsu 211106, China

Received:2023-08-03 Revised:2023-11-05 Online:2023-12-25 Published:2024-01-29

摘要/Abstract

摘要： 基于双层辉光等离子表面合金化技术在纯铜表面制备Ta涂层,并采用引入Ti中间过渡层的方式在纯铜表面制备Ti/Ta复合涂层,分析了Ti/Ta复合涂层的微观结构,研究了复合涂层对铜基体的热震行为和熔盐热腐蚀行为的影响。结果表明,亚微米结构的Ti/Ta复合涂层组织致密均匀,厚度约为14.5 μm,表面为α-Ta相。与Ta涂层相比,Ti/Ta复合涂层在700 ℃热震20次后表面仍较为平整致密,无任何微裂纹产生;呈梯度分布的中间Ti层缓解了界面应力,提升了涂层的抗热震性能。在500 ℃时NaCl和KCl混合盐腐蚀10 h后,纯铜质量增加为12.89 mg/cm²,Ti/Ta复合涂层的质量增加仅为2.8 mg/cm²,Ti/Ta复合涂层表面形成致密的Ta₂O₅氧化膜,有效阻止了熔盐腐蚀的深入,提高了铜基体的抗熔盐腐蚀性能。

关键词: 双层辉光等离子表面合金化技术, Ti/Ta复合涂层, 热震, 熔盐热腐蚀

Abstract: By using double glow plasma surface alloying technology, Ti/Ta composite coating and Ta coating were prepared on the surface of pure copper, where for the preparation of the former a titanium transition layer was added. The microstructure of the Ti/Ta composite coating was analyzed, and the influence of the composite coating on the thermal shock behavior and molten salt corrosion behavior of the copper substrate was studied. The results show that the microstructure of the submicron structured Ti/Ta composite coating is dense and uniform, with a thickness of approximately 14.5 μm, and the surface is α-Ta phase. After 20 thermal shocks at 700 ℃, compared with the single Ta layer, the surface of Ti/Ta composite coating remains relatively flat, dense, and without any micro-cracks, where the gradient distribution of the intermediate Ti layer alleviates the interface stress and significantly improves the thermal shock resistance of the coating. After 10 h of hot corrosion in a mixed salt of NaCl and KCl at 500 ℃, the mass gain of pure copper is 12.89 mg/cm², while that of the Ti/Ta composite coating is only 2.8 mg/cm². The dense Ta₂O₅ oxide film formed on the surface of the Ti/Ta composite coating effectively prevents the penetration of molten salt corrosion, and improves the corrosion resistance of pure copper.

Key words: double glow plasma surface alloying technology, Ti/Ta composite coating, thermal shock, molten salt hot corrosion

中图分类号:

TG178

吕绪明, 高泽宇, 魏东博, 胡玉锦, 杨凯, 张平则. 纯铜表面Ti/Ta复合涂层的制备及性能[J]. 金属热处理, 2023, 48(12): 206-212.

Lü Xuming, Gao Zeyu, Wei Dongbo, Hu Yujin, Yang Kai, Zhang Pingze. Preparation and properties of Ti/Ta composite coating on pure copper surface[J]. Heat Treatment of Metals, 2023, 48(12): 206-212.

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纯铜表面Ti/Ta复合涂层的制备及性能

Preparation and properties of Ti/Ta composite coating on pure copper surface

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