水热腐蚀老化对热障涂层的摩擦磨损性能的影响

doi:10.11902/1005.4537.2022.075

中国腐蚀与防护学报

2023, Vol. 43

Issue (2): 261-270 CSTR: 32134.14.1005.4537.2022.075 DOI: 10.11902/1005.4537.2022.075

中国腐蚀与防护学报编委、青年编委专栏

本期目录 | 过刊浏览

水热腐蚀老化对热障涂层的摩擦磨损性能的影响

周文晖¹, 宋健¹, 陈泽浩¹(

), 杨兰兰², 王金龙¹, 陈明辉¹, 朱圣龙¹^,³, 王福会¹^,³

^1.东北大学沈阳材料科学国家研究中心东北大学联合研究分部沈阳 110819
^2.江苏科技大学材料科学与工程学院镇江 212003
^3.中国科学院金属研究所腐蚀与防护实验室沈阳 110016

Effect of Low Temperature Degradation on Tribological Properties of YSZ Thermal Barrier Coatings

ZHOU Wenhui¹, SONG Jian¹, CHEN Zehao¹(

), YANG Lanlan², WANG Jinlong¹, CHEN Minghui¹, ZHU Shenglong¹^,³, WANG Fuhui¹^,³

^1.Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
^2.School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
^3.China Laboratory of Corrosion and Protection, Institute of Matel Research, Chinese Academy of Sciences, Shenyang 110016, China

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摘要:

海洋环境下，热障涂层因水蒸气的作用发生水热腐蚀老化，同时还承受高温气流冲蚀带来的摩擦磨损破坏。本文采用大气等离子喷涂技术在单晶合金N5上制备了带有NiCrAlY粘结层和8YSZ面层的热障涂层，并使用MFT-5000摩擦磨损试验机测试了热障涂层在水热腐蚀老化后的摩擦磨损行为，同时通过XRD与SEM对涂层腐蚀后的物相构成与磨损形貌进行了分析。结果表明，水热腐蚀老化会使YSZ陶瓷发生四方相至单斜相的相变，且单斜相主要在ZrO₂晶界处萌生，引起晶粒间结合强度降低，导致涂层耐磨性能降低。在高温氧化环境及高温氧化-低温水热老化交变环境下，涂层的磨损机制为脆性断裂引起的片层剥离，同时还伴有磨粒磨损和黏着磨损；而在低温水热环境下涂层的磨损机制为微断裂引起的晶粒剥离。

关键词 ：热障涂层, 水热老化, 摩擦磨损

Abstract：

During in flight and grounded in port in marine environments, aero engine may experience high temperature and low temperature water vapor cycles, thus thermal barrier coatings should be suffered simultaneously from serious frictional wear during service, as well as hydrothermal corrosion aging at lower temperature during grounded in port, therefore, it seems to be intensively concerned how the low temperature hydrothermal aging affects the tribological performance of the TBCs. Hence, 8YSZ top-coat and NiCrAlY bond-coat were successively deposited on the single crystal superalloy N5 by APS, i.e., TBCs were constructed on the alloy surface. Then the frictional performance of the low temperature hydrothermal corrosion aged TBCs was assessed by means of MFT-5000 friction and wear tester, SEM and XRD. The results indicated that hydrothermal corrosion aging of the YSZ ceramic results in the occurrence of transformation from tetragonal phase to monoclinic phase, and the monoclinic phase mainly initiates at zirconia grain boundary, as a consequence, the cohesion of precipitated ZrO₂ grains, and the wear resistance of the top coat would be gradually degraded. Slice delamination caused by brittle fracture was observed on the surface of the ceramic coating after long-term alternating corrosion degeneration or high termperature oxidation. Abrasive wear and adhesive wear were also found on the surface of the coatings. The wear mechanism of the low temperature hydrothermal corrosion aged coatings was microfracture, which induced by the exfoliation of YSZ grains.

Key words： thermal barrier coating low temperature hydrothermal aging frictional wear

收稿日期: 2022-03-15 32134.14.1005.4537.2022.075

ZTFLH:

TG172

基金资助:国家自然科学基金(51801021);工业和信息技术部项目(MJ-2017-J-99);教育部中央高效基本科研业务费(N2102015)

作者简介: 周文晖，男，1997年生，硕士生

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引用本文:

周文晖, 宋健, 陈泽浩, 杨兰兰, 王金龙, 陈明辉, 朱圣龙, 王福会. 水热腐蚀老化对热障涂层的摩擦磨损性能的影响[J]. 中国腐蚀与防护学报, 2023, 43(2): 261-270.
Wenhui ZHOU, Jian SONG, Zehao CHEN, Lanlan YANG, Jinlong WANG, Minghui CHEN, Shenglong ZHU, Fuhui WANG. Effect of Low Temperature Degradation on Tribological Properties of YSZ Thermal Barrier Coatings. Journal of Chinese Society for Corrosion and protection, 2023, 43(2): 261-270.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.075 或 https://www.jcscp.org/CN/Y2023/V43/I2/261

表1 大气等离子喷涂参数

图1 APS制备的原始态热障涂层的表面与截面微观形貌图

图2 YSZ陶瓷层在不同环境下交替腐蚀10次后的XRD谱图

图3 YSZ陶瓷层在不同环境下交替腐蚀10次后的微观截面形貌图

图4 YSZ陶瓷层在不同环境下交替腐蚀10次后表面的EBSD图

图5 不同试验环境下交替腐蚀10次后YSZ陶瓷层的磨痕形貌

图6 不同试验环境下腐蚀10循环后YSZ陶瓷层的摩擦系数曲线

图7 不同环境下交替腐蚀10次后陶瓷层表面的磨损形貌

图8 H组试样反复相变示意图

图9 不同环境下交替腐蚀10次后陶瓷层的磨损形貌

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