粘接层预氧化对热障涂层TGO生长与抗高温氧化性能的影响

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (6): 1-7.

• 材料科学与工程 • 下一篇

粘接层预氧化对热障涂层TGO生长与抗高温氧化性能的影响

安国升^1,2, 李文生^*1,2, 冯力^1,2, 成波^1,2, 李子钰², 周兰³

1.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
3.兰州理工大学机电工程学院, 甘肃兰州 730050

收稿日期:2022-03-14 出版日期:2022-12-28 发布日期:2023-03-21
通讯作者: 李文生(1973-),男,甘肃民勤人,博士,教授.Email:liws@lut.edu.cn
基金资助:
国家自然科学基金(52075234,51901093),甘肃省青年博士基金(2021QB-043)

Effect of bond coating pre-oxidation on TGO growth behaviors and high- temperature oxidation resistance of thermal barrier coating

AN Guo-sheng^1,2, LI Wen-sheng^1,2, FENG Li^1,2, CHENG Bo^1,2, LI Zi-yu², ZHOU Lan³

1. School of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metal, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. School of Mechatronics Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2022-03-14 Online:2022-12-28 Published:2023-03-21

摘要/Abstract

摘要： 利用预氧化技术在热障涂层(TBC)的陶瓷层/粘接层界面形成致密Al₂O₃层,经过1 100 ℃高温氧化试验,研究了该Al₂O₃层通过抑制氧气扩散,降低热生长氧化物(TGO)生长速率的作用机理,阐明了粘接层预氧化对整体热障涂层氧化行为的影响规律.结果表明:喷涂态(A-TBC)与预氧化(P-TBC)试样的TGO厚度及氧化增重均随氧化时间的延长而增长.但是,P-TBC显著减少了整个过程氧的扩散,有效抑制了氧化初期TGO的急速生长,使得P-TBC能够长期保持有益的TGO结构、降低抛物线氧化速率,并最终提高热障涂层抗高温氧化性能.

关键词: 预氧化, 热障涂层, 热生长氧化物

Abstract: A dense Al₂O₃ layer was prepared at the ceramic/bond coating interface of thermal barrier coatings (TBC) by pre-oxidation technology. Isothermal oxidation tests were carried out at 1 100 ℃ to investigate the mechanism of Al₂O₃ layer reducing growth rates of thermally grown oxide (TGO) by inhibiting oxygen diffusion. The results showed that the TGO thickness and oxidation weight gain of as-sprayed TBC (A-TBC) and pre-oxidation TBC (P-TBC) increase by increasing the isothermal oxidation time. However, the P-TBC significant reduce oxygen diffusion in the entire oxidation process, and inhibite the TGO rapid growth at the initial stage of oxidation. This is contributed to P-TBC keeping a beneficial TGO structure, decreasing parabolic oxidation rate, and finally improving high-temperature oxidation resistance of TBC.

Key words: pre-oxidation, thermal barrier coating, thermally grown oxide

中图分类号:

TG174.4

安国升, 李文生, 冯力, 成波, 李子钰, 周兰. 粘接层预氧化对热障涂层TGO生长与抗高温氧化性能的影响[J]. 兰州理工大学学报, 2022, 48(6): 1-7.

AN Guo-sheng, LI Wen-sheng, FENG Li, CHENG Bo, LI Zi-yu, ZHOU Lan. Effect of bond coating pre-oxidation on TGO growth behaviors and high- temperature oxidation resistance of thermal barrier coating[J]. Journal of Lanzhou University of Technology, 2022, 48(6): 1-7.

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粘接层预氧化对热障涂层TGO生长与抗高温氧化性能的影响

Effect of bond coating pre-oxidation on TGO growth behaviors and high- temperature oxidation resistance of thermal barrier coating

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