硅酸盐学报

激光表面改性对Yb₂Si₂O₇涂层耐腐蚀性能的影响

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苏景新 ¹ , 张凌浩 ¹ , 程涛涛 ¹ , 张涛 ¹ , 王远航 ¹^,² , 王志平 ¹

硅酸盐学报 | 研究论文 2026,54(4): 1381-1395

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硅酸盐学报 | 研究论文 2026, 54(4): 1381-1395

激光表面改性对Yb₂Si₂O₇涂层耐腐蚀性能的影响

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苏景新¹, 张凌浩¹, 程涛涛¹, 张涛¹, 王远航¹^,², 王志平¹

作者信息

^1．中国民航大学，天津市民用航空器适航与维修重点实验室，天津 300300

^2．珠海保税区摩天宇航空发动机维修有限公司，广东珠海 519000

苏景新（1978—），男，博士，副教授。

SU Jingxin (1978-), male, Ph.D., Associate Professor. E-mail: jxsu@cauc.edu.cn

通讯作者:

程涛涛（1987—），男，博士，高级实验师。

Effect of Laser Surface Modification on the Corrosion Resistance of Yb₂Si₂O₇ Coatings

Jingxin SU¹, Linghao ZHANG¹, Taotao CHENG¹, Tao ZHANG¹, Yuanhang WANG¹^,², Zhiping WANG¹

Affiliations

^1.Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China

^2.MTU Maintenance Zhuhai Co., Ltd., Zhuhai 519000, Guangdong, China

出版时间: 2026-01-26 doi: 10.14062/j.issn.0454-5648.20250647

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摘要

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采用大气等离子喷涂（APS）技术制备了Yb₂Si₂O₇（YbDS）/Si环境障涂层（EBCs），引入紫外皮秒超短脉冲激光对YbDS涂层进行表面处理釉化，并通过氧化钙-氧化镁-氧化铝-硅酸盐（CMAS）腐蚀实验研究了涂层的耐腐蚀性能和腐蚀损伤机理。通过调控激光功率与扫描速率，设置4组不同参数，分别得到了L1、L2、L3和L4四种改性釉化层。对改性前后涂层的物相组成与微观结构进行表征，结果表明，改性层转变为一层均匀致密的釉化层，显著减少了涂层表面的缺陷，同时釉化层中的Yb₂Si₂O₇相完全转变为Yb₂SiO₅相。对比不同处理参数后发现，L2涂层在结构致密性与缺陷控制方面表现最优，其粗糙度仅有1.82 μm，孔隙率约为4.42%，具有最佳的耐CMAS腐蚀潜力。经过120 h的CMAS腐蚀实验后，L2涂层的腐蚀深度仅为YbDS的50%。进一步研究发现：激光表面处理形成的致密釉化层在高温腐蚀过程中起到了有效的物理隔绝作用；釉化层中Yb₂SiO₅相与CMAS反应生成致密的Ca₂Yb₈（SiO₄）₆O₂（磷灰石相）反应层，进一步阻碍CMAS的渗透；激光釉化后显著提高了涂层的接触角，使得CMAS熔盐有利于被高速气流冲刷带走，降低了涂层被CMAS腐蚀的风险。

关键词

环境障涂层 / 熔盐腐蚀 / 激光表面处理 / 釉化层 / 接触角

Abstract

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Introduction

With the continuous pursuit of higher efficiency and larger thrust-to-weight ratio in aero-gas-turbine engines, the turbine inlet temperature has already exceeded 1300 ℃, imposing increasingly stringent requirements on the thermal resistance and protective capability of hot-section structural materials. Environmental barrier coatings (EBCs) have become a crucial technology to ensure efficient and reliable service of ceramic matrix composite (CMC) turbine components under such extreme working conditions. However, the service environment of EBCs is exceptionally complex. Coatings are continuously exposed to corrosive gaseous species within combustion products, among which the ingression and reaction of molten calcium-magnesium-aluminum-silicate (CMAS) deposits represent one of the most detrimental degradation mechanisms.

To mitigate CMAS-induced deterioration, numerous strategies have been proposed, including compositional modification (doping, high-entropy ceramics), structural design optimization (multilayer or graded coatings), and surface engineering (laser or ion beam treatments). Although these approaches can improve corrosion resistance to some extent, most of them inevitably alter the coating chemistry or structural system, which tends to induce thermal expansion mismatch with the substrate and promotes premature failure during thermal cycling. Therefore, how to enhance CMAS-corrosion resistance while maintaining thermomechanical compatibility remains a critical challenge. Laser glazing (LG) is a surface-modification technique that locally melts and rapidly solidifies the coating surface to form a dense glaze layer. It improves surface compactness and seals microdefects without altering the coating composition, thereby presenting a promising method for improving CMAS-corrosion resistance. In this work, laser glazing is introduced to enhance the CMAS-resistance of EBCs, and the CMAS-corrosion behavior together with the underlying improvement mechanisms are systematically investigated.

Methods

SiC ceramic substrates were purchased from Fuzhou Pengkun Optoelectronics Co., Ltd. The samples were cylindrical (diameter 25.4 mm, thickness 3 mm) and mechanically grit-blasted prior to coating deposition. Yb₂Si₂O₇/Si (YbDS) EBCs were deposited on the substrates by atmospheric plasma spraying (APS). Commercial Yb₂Si₂O₇ and Si powders (Shanghai Shuitian Materials Technology Co., Ltd.) were used, and the bond coat consisted of 90% (in mass fraction) Si and 10% Yb₂Si₂O₇. A picosecond ultraviolet pulsed-laser system was subsequently applied to modify the surface microstructure of APS YbDS coatings. Four sets of parameters (L1-L4) were obtained by adjusting the laser power (6 W or 20 W) and scanning speed (100-300 mm/s). CMAS bulk material was synthesized by high-temperature melting. CMAS powder was mixed with ethanol and uniformly brushed onto the coating surface, followed by drying to achieve a coating mass of 5 mg/cm². The coated samples were exposed at 1350 ℃ for 10, 60 h, and 120 h. After corrosion, the evolution of microstructure and phase composition was analyzed to reveal the degradation behavior.

Results and discussion

The APS-prepared YbDS coating exhibited a surface roughness of ~3.7 μm and a porosity of ~4.87%, with typical APS defects such as pores, unmelted particles, and microcracks. After laser glazing, four modified surfaces were obtained. Among them, sample L2 demonstrated the most favorable structural morphology and was selected for subsequent corrosion tests. The L2 coating showed a reduced surface roughness of ~1.824 μm and a homogeneous, dense glaze layer of ~9.6 μm thickness. Moreover, the glazed surface phase completely transformed from Yb₂Si₂O₇ to Yb₂SiO₅. During CMAS corrosion, the YbDS coating surface was continuously covered by a loose mixture of Ca₂Yb₈(SiO₄)₆O₂ and CMAS residual glass. In contrast, the laser-modified L2 coating was covered by a compact Ca₂Yb₈(SiO₄)₆O₂ reaction layer. After corrosion, both coatings displayed Ca₂Yb₈(SiO₄)₆O₂ and secondary Yb₂Si₂O₇ phases; however, their structural evolution differed significantly. After 120 h of corrosion, the YbDS coating suffered severe structural degradation, including interfacial delamination and partial spallation in cross-sectional observations. Conversely, the L2 coating maintained structural integrity, and its corrosion depth was consistently lower under the same conditions.

The improved CMAS resistance of the L2 coating can be attributed to three synergistic mechanisms: Surface densification, Laser glazing produced a dense, continuous glaze layer that sealed APS-induced pores and cracks, effectively delaying CMAS infiltration pathways; Protective reaction-layer formation, The Yb₂SiO₅ glaze reacted with CMAS to form a dense Ca₂Yb₈(SiO₄)₆O₂ layer, which further hindered molten-salt penetration ;Enhanced non-wettability, Laser glazing significantly reduced surface roughness and improved hydrophobicity. As a result, molten CMAS appeared as aggregated hemispherical droplets rather than fully spreading, making it more easily removed by high-velocity gas flow during service.

Conclusions

The findings of this study demonstrate that laser glazing effectively enhances the CMAS-corrosion resistance of YbDS coatings. The improvement originates from the combined effects of surface densification, pore/crack sealing, phase transformation to Yb₂SiO₅, and subsequent formation of a compact Ca₂Yb₈(SiO₄)₆O₂ reaction layer during corrosion. Additionally, the smoother and less wettable glazed surface reduces the adhesion and spreading tendency of CMAS, enabling molten deposits to be removed more easily under aerodynamic forces. As a result, the degradation rate of the coating is substantially suppressed, delaying the propagation of corrosion-induced cracks and maintaining structural integrity over prolonged exposure. Moreover, the laser-induced modifications do not alter the coating architecture or introduce thermal expansion mismatch, making the technique compatible with existing EBC design frameworks. Overall, laser glazing represents a promising strategy for improving the durability and service lifetime of EBC systems in next-generation high-temperature aero-engine applications.

Key words

environmental barrier coatings / molten salt corrosion / laser surface treatment / glaze layer / contact angle

引用本文

苏景新, 张凌浩, 程涛涛, 张涛, 王远航, 王志平. 激光表面改性对Yb₂Si₂O₇涂层耐腐蚀性能的影响. 硅酸盐学报, 2026 , 54 (4) : 1381 -1395 . DOI: 10.14062/j.issn.0454-5648.20250647

Jingxin SU, Linghao ZHANG, Taotao CHENG, Tao ZHANG, Yuanhang WANG, Zhiping WANG. Effect of Laser Surface Modification on the Corrosion Resistance of Yb₂Si₂O₇ Coatings[J]. Journal of the Chinese Ceramic Society, 2026 , 54 (4) : 1381 -1395 . DOI: 10.14062/j.issn.0454-5648.20250647

基金

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中央高校自然科学重点项目(3122025081)
中国民航大学天津市民用航空器适航与维修重点实验室开放基金（高熵氧化物陶瓷涂层制备及抗污损机理研究）
科技部重点研发项目(2023YFB4302402)

参考文献

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2026年第54卷第4期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250647

接收时间：2025-09-04
首发时间：2026-05-20
出版时间：2026-01-26

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收稿日期：2025-09-04
修回日期：2025-10-27

基金

中央高校自然科学重点项目(3122025081)

中国民航大学天津市民用航空器适航与维修重点实验室开放基金（高熵氧化物陶瓷涂层制备及抗污损机理研究）

科技部重点研发项目(2023YFB4302402)

作者信息

^1．中国民航大学，天津市民用航空器适航与维修重点实验室，天津 300300

^2．珠海保税区摩天宇航空发动机维修有限公司，广东珠海 519000

通讯作者:

程涛涛（1987—），男，博士，高级实验师。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250647

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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