激光辅助热喷涂NiCoCrAlYTa-Cr2O3-Cu-Mo涂层高温静态氧化行为

doi:10.13251/j.issn.0254-6051.2023.02.039

金属热处理 ›› 2023, Vol. 48 ›› Issue (2): 247-255.DOI: 10.13251/j.issn.0254-6051.2023.02.039

激光辅助热喷涂NiCoCrAlYTa-Cr₂O₃-Cu-Mo涂层高温静态氧化行为

聂梓杏¹, 王长亮¹, 张昂¹, 张梅², 郭孟秋¹, 田浩亮¹, 崔永静¹, 王天颖¹

1.中国航发北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室,北京 100095;
2.北京航空航天大学材料科学与工程学院, 北京 100191

收稿日期:2022-09-27 修回日期:2023-01-04 出版日期:2023-02-25 发布日期:2023-03-22
通讯作者: 王长亮,研究员,博士,E-mail:cliangwang@126.com
作者简介:聂梓杏(1997—),男,助理工程师,硕士,主要研究方向为航空发动机表面防护,E-mail:744353919@qq.com。
基金资助:
国家科技重大专项(2017-VII-0013-0110)

Static oxidation behavior at high temperature of laser-assisted thermal sprayed NiCoCrAlYTa-Cr₂O₃-Cu-Mo coating

Nie Zixing¹, Wang Changliang¹, Zhang Ang¹, Zhang Mei², Guo Mengqiu¹, Tian Haoliang¹, Cui Yongjing¹, Wang Tianying¹

1. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institution of Aeronautical Materials, Beijing 100095, China;
2. School of Materials Science and Engineering, Beihang University, Beijing 100191, China

Received:2022-09-27 Revised:2023-01-04 Online:2023-02-25 Published:2023-03-22

摘要/Abstract

摘要： 为探究高温润滑耐磨涂层抗高温氧化行为,采用激光辅助等离子喷涂技术(LPHS)在GH4065A镍基高温合金上制备NiCoCrAlYTa-Cr₂O₃-Cu-Mo涂层,研究了该涂层在(850~1000) ℃×220 h的抗高温氧化行为。计算得出氧化激活能约为128.5 kJ·mol^-1,850、900、1000 ℃氧化速率常数分别为1.44×10^-2、3.61×10^-2、7.71×10^-2 mg²·cm^-4·h^-1。结果表明,850 ℃×220 h氧化后表面生成Al₂O₃为主的连续致密氧化膜,阻碍涂层内部的进一步氧化;1000 ℃×220 h氧化后表面生成疏松NiO为主,致密Cr₂O₃·NiO为辅的氧化膜。致密氧化膜的生成阻止了涂层及基体的进一步氧化。

关键词: 激光辅助热喷涂, 高温润滑耐磨涂层, 高温氧化, 氧化速率常数

Abstract: NiCoCrAlYTa-Cr₂O₃-Cu-Mo high temperature lubrication wear-resistant coating was prepared on the GH4065A nickel-based superalloy by laser-assisted plasma spraying (LPHS) technology, and then the high temperature oxidation resistance of the coating at 850-1000 ℃ for 220 h was investigated. The calculated oxidation activation energy is about 128.5 kJ·mol^-1, and the oxidation rate constants at 850, 900 and 1000 ℃ are 1.44×10^-2, 3.61×10^-2, 7.71×10^-2 mg²·cm^-4·h^-1, respectively. The experimental results show that after oxidation at 850 ℃ for 220 h, a continuous and dense oxide film dominated by Al₂O₃ is formed on the surface, which can prevent the further oxidation inside the coating. After oxidation at 1000 ℃ for 220 h, an oxide film consisting mainly of loose NiO and supplemented by dense Cr₂O₃·NiO is formed on the surface. The formation of dense oxide film prevents further oxidation of both the coating and the GH4065A superalloy substrate.

Key words: laser-assisted thermal spraying, high temperature lubrication wear resistant coating, high temperature oxidation, oxidation rate constant

中图分类号:

TG174.4

聂梓杏, 王长亮, 张昂, 张梅, 郭孟秋, 田浩亮, 崔永静, 王天颖. 激光辅助热喷涂NiCoCrAlYTa-Cr₂O₃-Cu-Mo涂层高温静态氧化行为[J]. 金属热处理, 2023, 48(2): 247-255.

Nie Zixing, Wang Changliang, Zhang Ang, Zhang Mei, Guo Mengqiu, Tian Haoliang, Cui Yongjing, Wang Tianying. Static oxidation behavior at high temperature of laser-assisted thermal sprayed NiCoCrAlYTa-Cr₂O₃-Cu-Mo coating[J]. Heat Treatment of Metals, 2023, 48(2): 247-255.

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激光辅助热喷涂NiCoCrAlYTa-Cr₂O₃-Cu-Mo涂层高温静态氧化行为

Static oxidation behavior at high temperature of laser-assisted thermal sprayed NiCoCrAlYTa-Cr₂O₃-Cu-Mo coating

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