表面改性Si-HfO2/YbDS/GYYZO热-环境障涂层的抗CMAS腐蚀性能

doi:10.15541/jim20250452

无机材料学报

表面改性Si-HfO₂/YbDS/GYYZO热-环境障涂层的抗CMAS腐蚀性能

商森^1,2, 姜林文¹, 董浩², 戴睿², 吴健², 卓学士², 张军贵², 张小锋²

1.宁波大学, 材料科学与化学工程学院, 宁波 315000;
2.广东省科学院新材料研究所, 现代材料表面工程技术国家工程实验室及广东省现代表面工程技术重点实验室, 广州 510650

收稿日期:2025-11-09 修回日期:2026-01-19
作者简介:商森(2000-),男,硕士研究生. E-mail:2356800464@qq.com
基金资助:
四川省科技计划(2025ZDZX0003)

CMAS Corrosion Resistance of Al-modified Si-HfO₂/YbDS/GYYZO Thermal-environmental Barrier Coating

SHANG Sen^1,2, JIANG Linwen¹, DONG Hao², DAI Rui², WU Jian², ZHUO Xueshi², ZHANG Jungui², ZHANG Xiaofeng²

1. Ningbo University, College of Materials Science and Chemical Engineering, Ningbo 315000, China;
2. National Engineering Laboratory for Modern Materials Surface Engineering Technology, and Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China

Received:2025-11-09 Revised:2026-01-19
About author:SHANG Sen (2000-), male, Master candidate. E-mail: 2356800464@qq.com
Supported by:
Sichuan Science and Technology Program (2025ZDZX0003)

摘要/Abstract

摘要： 随着航空发动机热端部件服役温度的提升, 钙镁铝硅酸盐(CMAS)腐蚀已成为热/环境障涂层(T/EBCs)失效的关键因素。新型Gd₂O₃-Yb₂O₃-Y₂O₃共稳ZrO₂(GYYZO)陶瓷因其优异的热物理性能而颇具应用前景, 但在1500 ℃极端高温下, 其抗CMAS腐蚀性能仍需进一步提高。本研究采用表面镀铝+真空热处理方法对等离子喷涂-物理气相沉积(Plasma Spray-physical Vapor Deposition, PS-PVD)制备的Si-HfO₂/Yb₂Si₂O₇/GYYZO涂层体系进行表面改性。首先, 对PS-PVD制备的涂层进行1300 ℃退火处理, 愈合微裂纹; 随后, 利用直流脉冲磁控溅射技术在GYYZO层表面沉积厚度为3~4 μm的铝薄膜; 最后, 通过真空热处理(400 ℃/2.5 h + 660 ℃/2 h + 808 ℃/1.5 h + 980 ℃/1 h)使铝层转化为致密的Al₂O₃阻挡层。系统研究了改性前后涂层在1500 ℃下的CMAS腐蚀演变行为及失效机理。结果表明, 在1500 ℃下, CMAS熔体通过晶界快速渗透至未改性GYYZO涂层内部, 诱使Yb₂Si₂O₇层产生“起泡”损伤及大量裂纹, 最终导致涂层加速失效。与之相比, 经铝改性技术处理后的GYYZO涂层, 得益于表面原位生成的致密Al₂O₃阻挡层, 可有效抑制CMAS的晶界渗透, 从而延缓腐蚀动力学进程。在腐蚀1 h后, 改性涂层仍能保持结构完整性。

关键词: 热/环境障涂层, CMAS腐蚀, 铝改性, GYYZO

Abstract: The rising service temperature of aero-engine hot-section components makes calcium magnesium aluminum silicate (CMAS) corrosion a key failure mechanism for thermal/environmental barrier coatings T/EBCs. The novel Gd₂O₃-Yb₂O₃-Y₂O₃ co-stabilized ZrO₂ (GYYZO) ceramic is promising due to its good thermophysical properties, however, its CMAS corrosion resistance at 1500 ℃ needs improvement. In this work, a PS-PVD-fabricated Si-HfO₂/Yb₂Si₂O₇/GYYZO coating system was enhanced via Al deposition and vacuum heat treatment. Firstly, the as-sprayed coating was annealed at 1300 ℃ to heal microcracks. Subsequently, a 3-4 μm thick aluminum film was deposited on the GYYZO layer surface via direct current pulsed magnetron sputtering. Finally, vacuum heat treatment (400 ℃/2.5 h + 660 ℃/2 h + 808 ℃/1.5 h + 980 °C/1 h) was conducted to promote the formation of a dense Al₂O₃ barrier layer. A comparative study at 1500 ℃ revealed that CMAS rapidly penetrated the unmodified GYYZO coating along grain boundaries, causing blistering and cracking in the Yb₂Si₂O₇ layer and accelerating failure. Conversely, the Al-modified GYYZO coating formed a dense Al₂O₃ barrier in situ, effectively suppressing CMAS penetration and slowing corrosion kinetics, thus maintaining structural integrity after 1 h.

Key words: thermal/environmental barrier coating, CMAS corrosion, aluminum modification, GYYZO

中图分类号:

TQ174

商森, 姜林文, 董浩, 戴睿, 吴健, 卓学士, 张军贵, 张小锋. 表面改性Si-HfO₂/YbDS/GYYZO热-环境障涂层的抗CMAS腐蚀性能[J]. 无机材料学报, DOI: 10.15541/jim20250452.

SHANG Sen, JIANG Linwen, DONG Hao, DAI Rui, WU Jian, ZHUO Xueshi, ZHANG Jungui, ZHANG Xiaofeng. CMAS Corrosion Resistance of Al-modified Si-HfO₂/YbDS/GYYZO Thermal-environmental Barrier Coating[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250452.

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表面改性Si-HfO₂/YbDS/GYYZO热-环境障涂层的抗CMAS腐蚀性能

CMAS Corrosion Resistance of Al-modified Si-HfO₂/YbDS/GYYZO Thermal-environmental Barrier Coating

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