大气等离子热障涂层体系在<strong>900 ℃</strong>含水蒸气和<strong>NaCl</strong>环境下的腐蚀行为

doi:10.11902/1005.4537.2024.412

中国腐蚀与防护学报

2025, Vol. 45

Issue (5): 1233-1243 CSTR: 32134.14.1005.4537.2024.412 DOI: 10.11902/1005.4537.2024.412

研究报告

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大气等离子热障涂层体系在900 ℃含水蒸气和NaCl环境下的腐蚀行为

李琰琰¹, 李帅²(

), 董超¹, 李冬强¹, 鲍泽斌², 朱圣龙²

1 中国航发沈阳发动机研究所先进船舶发动机技术全国重点实验室沈阳 110015
2 中国科学院金属研究所师昌绪先进材料创新研究中心沈阳 110016

Corrosion Behavior of Atmospheric Plasma Spray Thermal Barrier Coatings at 900 °C Beneath NaCl Deposits in Oxygen Flow Carrying Water Vapor

LI Yanyan¹, LI Shuai²(

), DONG Chao¹, LI Dongqiang¹, BAO Zebin², ZHU Shenglong²

1 National Key Laboratory of Marine Engine Science and Technology, AECC Shenyang Engine Research Institute, Shenyang 110015, China
2 Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

李琰琰, 李帅, 董超, 李冬强, 鲍泽斌, 朱圣龙. 大气等离子热障涂层体系在900 ℃含水蒸气和NaCl环境下的腐蚀行为[J]. 中国腐蚀与防护学报, 2025, 45(5): 1233-1243.
Yanyan LI, Shuai LI, Chao DONG, Dongqiang LI, Zebin BAO, Shenglong ZHU. Corrosion Behavior of Atmospheric Plasma Spray Thermal Barrier Coatings at 900 °C Beneath NaCl Deposits in Oxygen Flow Carrying Water Vapor[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(5): 1233-1243.

全文: PDF(11349 KB) HTML

摘要:

分别采用两种型号的大气等离子喷涂(APS)工艺在超音速火焰喷涂(HVOF)制备的NiCoCrAlY涂层表面制备8%Y₂O₃稳定的ZrO₂ (YSZ)陶瓷面层，然后在900 ℃含水蒸气和NaCl环境下进行腐蚀测试，研究两种工艺制备的热障涂层(TBC)体系的腐蚀行为。研究结果表明：APS工艺可通过调整合适的主、辅气流量及喷涂电流改善YSZ陶瓷面层的结构，使其均匀致密、孔隙率更低。致密的YSZ陶瓷面层可一定程度上阻碍Cl和O的侵入，延缓NiCoCrAlY粘结层的氧化速率，从而使该TBC体系表现出更优异的热稳定性和耐海洋腐蚀性能。

关键词 ：材料表面与界面, 高温腐蚀, 热障涂层, 模拟海洋环境

Abstract：

Ceramic top coatings of 8%Y₂O₃-stabilized ZrO₂ (YSZ) were deposited on the surface of NiCoCrAlY bond coat on DZ411 Ni-based high temperature alloy via high-velocity oxygen fuel (HVOF) spraying with tow type of spraying processes, namely Metco 9M and Praxair 7700 spraying techniques, respectively. The corrosion behavior of the two YSZ thermal barrier coatings was evaluated beneath NaCl deposits in oxygen flow carrying water vapor at 900 ℃. As indicated by the results, the air plasma spraying process can optimize the microstructure of the YSZ ceramic top coat through a judicious adjustment of the plasma gas flow rate and spraying current, resulting in a uniformly dense and less porous structure. Due to its dense microstructure and low porosity, the compact YSZ ceramic top coat is capable of hindering the inward migration of chlorine and oxygen to a certain extent, thereby suppressing the oxidation rate of the NiCoCrAlY bond coating. It follows that, the YSZ thermal barrier coating prepared by the Praxair 7700 spraying process exhibited excellent thermal stability and corrosion resistance.

Key words： surface and interface in materials high temperature corrosion thermal barrier coatings simulated marine environment

收稿日期: 2024-12-26 32134.14.1005.4537.2024.412

ZTFLH:

TG174.2

基金资助:国家自然科学基金(52301116);中国博士后科学基金(2023M743572);先进船舶发动机技术全国重点实验室基金

通讯作者: 李帅，E-mail：sli17s@imr.ac.cn，研究方向为高性能高温防护热障涂层体系设计

Corresponding author: LI Shuai, E-mail: sli17s@imr.ac.cn

作者简介: 李琰琰，女，1998年生，博士，工程师

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.412 或 https://www.jcscp.org/CN/Y2025/V45/I5/1233

表1 DZ411镍基高温合金和NiCoCrAlY粉末的名义化学成分

图1 高温腐蚀测试设备结构示意图

图2 Metco 9M和Praxair 7700制备YSZ陶瓷面层的初始表面微观形貌

图3 YSZ陶瓷层分别由Metco 9M和Praxair 7700沉积的TBCs的截面微观形貌

图4 Metco 9M和Praxair 7700制备YSZ陶瓷面层的XRD图谱

图5 Metco 9M和Praxair 7700制备YSZ陶瓷面层在900 ℃水蒸气协同NaCl环境下腐蚀100 和200 h后的XRD图谱

图6 Metco 9M喷涂制备YSZ热障涂层体系腐蚀100 和200 h后的微观截面形貌

图7 Praxair 7700喷涂制备YSZ热障涂层体系腐蚀100和200 h后的微观截面形貌

图8 Metco 9M喷涂制备YSZ热障涂层体系腐蚀300 h后的微观截面形貌和(b)的EDS原始面分布图

表2 图8和9中标记区域的EDS结果

图9 Praxair 7700喷涂制备YSZ热障涂层体系腐蚀300 h后的微观截面形貌和EDS元素面扫描图

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