电子束物理气相沉积La2Ce2O7热障涂层的高温燃气热腐蚀行为研究

doi:10.11902/1005.4537.2016.175

中国腐蚀与防护学报

2017, Vol. 37

Issue (1): 36-40 DOI: 10.11902/1005.4537.2016.175

研究报告

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电子束物理气相沉积La₂Ce₂O₇热障涂层的高温燃气热腐蚀行为研究

王喜忠¹,吴建颢²,彭徽¹,郭洪波¹(

),宫声凯¹

1 北京航空航天大学材料科学与工程学院北京 100191
2 贵阳中航动力精密铸造有限公司贵阳 550012

Hot-gas Corrosion Resistance of La₂Ce₂O₇/8YSZ Duble-ceramic-layered Thermal Barrier Coating

Xizhong WANG¹,Jianhao WU²,Hui PENG¹,Hongbo GUO¹(

),Shengkai GONG¹

1 School of Material Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2 Guiyang AVIC Power Investment Casting Ltd. Co., Guiyang 550012, China

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摘要:

采用电子束物理气相沉积 (EB-PVD) 方法在镍基高温合金表面制备了La₂Ce₂O₇(LC)/8YSZ双陶瓷层热障涂层,研究了LC涂层在高温燃气热腐蚀条件下的高温稳定性以及涂层的抗热腐蚀性能。结果表明,LC陶瓷涂层在海水和航空煤油的热腐蚀环境下经过950 ℃曝露100 h后,涂层没有发生分解和相变,显示了良好的抗燃气热腐蚀性能;同时,金属粘结层表面形成了一层连续致密的氧化层。热障涂层经过循环腐蚀100 h后,仍然没有发生剥落失效。

关键词 ：热障涂层, La₂Ce₂O₇, 热腐蚀, 高温氧化, 失效

Abstract：

Double-ceramic-layered (DCL) TBCs of La₂Ce₂O₇(LC)/8YSZ were prepared by electron beam physical vapor deposition (EB-PVD) on Ni-base superalloy. The high temperature stability and corrosion-resistant property of TBCs was investigated in high temperature gas corrosion environment. The results show that no decomposition and phase transformation arises in the TBCs after 100 h exposure at 950 ℃ in the flowing air with aviation kerosene and artificial seawater. The TBCs display good high temperature gas corrosion-resistant property. A continuous and dense oxide scale forms on the bonding coat. No spallation of TBCs occurred after 100 h thermal cycling in the corrosion environment.

Key words： thermal barrier coating La₂Ce₂O₇ hot corrosion high-temperature oxidation failure

收稿日期: 2016-09-24

基金资助:国家自然科学基金 (51590894,51425102和51231001)

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引用本文:

王喜忠,吴建颢,彭徽,郭洪波,宫声凯. 电子束物理气相沉积La₂Ce₂O₇热障涂层的高温燃气热腐蚀行为研究[J]. 中国腐蚀与防护学报, 2017, 37(1): 36-40.
Xizhong WANG, Jianhao WU, Hui PENG, Hongbo GUO, Shengkai GONG. Hot-gas Corrosion Resistance of La₂Ce₂O₇/8YSZ Duble-ceramic-layered Thermal Barrier Coating. Journal of Chinese Society for Corrosion and protection, 2017, 37(1): 36-40.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.175 或 https://www.jcscp.org/CN/Y2017/V37/I1/36

图1 LC/8YSZ热障涂层在燃气热腐蚀实验不同时间的XRD谱

图2 LC/8YSZ热障涂层燃气热腐蚀实验不同时间后的表面形貌

图3 LC/8YSZ热障涂层燃气热腐蚀实验不同时间后的截面形貌

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