V2O5对β-(Ni,Pt)Al涂层热腐蚀抗性的影响

doi:10.11896/cldb.24030041

材料导报

2025, Vol. 39

Issue (7): 24030041-4 https://doi.org/10.11896/cldb.24030041

金属与金属基复合材料

V₂O₅对β-(Ni,Pt)Al涂层热腐蚀抗性的影响

叶利亚^1,2, 陈宏飞², 杨光², 高彦峰^2,*

1 上海航天科工电器研究院有限公司, 上海 200331
2 上海大学材料科学与工程学院, 上海 200444

Effect of V₂O₅ on the Hot Corrosion Resistance of β-(Ni, Pt)Al Coating

YE Liya^1,2, CHEN Hongfei², YANG Guang², GAO Yanfeng^2,*

1 Shanghai Space Appliance Co.,Ltd., Shanghai 200331, China
2 School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

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摘要 β-(Ni,Pt)Al相的Pt-Al涂层具有优异的抗氧化性能,常被用于航空发动机热端部件表面热防护。燃料燃烧产生的腐蚀产物复杂,会在部件表面形成复杂物相的熔盐沉积,因此明晰其腐蚀机制对提高β-(Ni,Pt)Al涂层的综合性能具有重要意义。除了针对单一组分Na₂SO₄熔盐热腐蚀行为的研究外,β-(Ni,Pt)Al涂层在Na₂SO₄+V₂O₅混合盐沉积下的腐蚀机制尚不明确。本工作通过在单相β-(Ni,Pt)Al涂层样品上分别涂覆Na₂SO₄和Na₂SO₄+V₂O₅的方式,对比研究了两种熔盐从950 ℃到室温循环条件下对涂层的腐蚀行为。通过对涂层腐蚀动力学、腐蚀产物物相演变和涂层形貌演变的分析发现:Na₂SO₄+V₂O₅混合盐的腐蚀表现出更大的氧化增重和更深的腐蚀深度。相比于单一Na₂SO₄腐蚀,V₂O₅的加入导致起始氧化膜发生酸性熔融,使其失去保护作用,并加快Pt从β-(Ni,Pt)Al相中析出,使涂层氧化抗性恶化。V₂O₅通过促使Na₂SO₄释放更多的SO₃来提高腐蚀界面处的硫化反应速率。本工作揭示了V₂O₅在熔盐热腐蚀中的作用机制,对如何提高β-(Ni,Pt)Al涂层的热腐蚀抗性具有重要指导意义。

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	叶利亚
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关键词: Pt-Al涂层硫酸钠五氧化二钒热腐蚀

Abstract: The β-(Ni, Pt)Al coating has excellent oxidation resistance and is used for thermal protection of hot section components in advanced gas turbine engine during service. The fuel combustion products are complex and can form molten salt deposits on the surface of components. Clarifying its corrosion mechanism is of great significance for improving the comprehensive performance of β-(Ni, Pt)Al coatings. Except for the research on the hot corrosion behavior of single component Na₂SO₄ molten salt, the corrosion mechanism of β-(Ni, Pt)Al coating under the deposition of Na₂SO₄+V₂O₅ mixed salt is still unclear. This work prepared single-phase β-(Ni, Pt)Al coatings deposited by Na₂SO₄ and Na₂SO₄+V₂O₅, respectively, and compared their corrosion behaviors under thermal cycles from 950 ℃ to room temperature. Through analysis of hot corrosion kinetics, phase evolution of corrosion products, and corrosion morphology evolution, it was found that the corrosion of Na₂SO₄+V₂O₅ mixed salt exhibited greater oxidation weight gain and deeper corrosion depth. Compared to single Na₂SO₄ corrosion, the V₂O₅ leads to acidic melting of the initial oxide film, causing it to lose its protective effect. V₂O₅ also accelerated the precipitation of Pt from the β-(Ni, Pt)Al phase, which deteriorated the oxidation resistance of the coating. This work reveals the mechanism of V₂O₅ accelerating hot corrosion, which has important guiding significance for improving the hot corrosion resistance of β-(Ni, Pt)Al coatings.

Key words: Pt-Al coating Na₂SO₄ V₂O₅ hot corrosion

出版日期: 2025-04-10 发布日期: 2025-04-10

ZTFLH:

TG171

基金资助: 国家自然科学基金(52072232)

通讯作者: *高彦峰,博士,研究员,博士研究生导师。主要研究领域包括光热调制材料、多频谱隐身伪装材料、特种无机高分子复合材料等。yfgao@shu.edu.cn

作者简介: 叶利亚,上海大学材料科学与工程学院博士后,主要研究领域为高温涂层和电子陶瓷。

引用本文:

叶利亚, 陈宏飞, 杨光, 高彦峰. V₂O₅对β-(Ni,Pt)Al涂层热腐蚀抗性的影响[J]. 材料导报, 2025, 39(7): 24030041-4.
YE Liya, CHEN Hongfei, YANG Guang, GAO Yanfeng. Effect of V₂O₅ on the Hot Corrosion Resistance of β-(Ni, Pt)Al Coating. Materials Reports, 2025, 39(7): 24030041-4.

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https://www.mater-rep.com/CN/10.11896/cldb.24030041 或 https://www.mater-rep.com/CN/Y2025/V39/I7/24030041

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