长时热暴露对一种热障涂层<strong>/DZ411</strong>镍基高温合金体系界面组织演变的影响

doi:10.11901/1005.3093.2024.026

材料研究学报

2025, Vol. 39

Issue (2): 113-125 DOI: 10.11901/1005.3093.2024.026

研究论文

本期目录 | 过刊浏览

长时热暴露对一种热障涂层/DZ411镍基高温合金体系界面组织演变的影响

袁鸿渊¹, 张思倩¹(

), 王栋², 张英建³, 马力³, 于明涵², 张浩宇¹, 周舸¹, 陈立佳¹

1 沈阳工业大学材料科学与工程学院沈阳 110870
2 中国科学院金属研究所高温结构材料研究部沈阳 110016
3 东北大学材料科学与工程学院沈阳 110819

Effect of Long-term Thermal Exposure on Microstructure Evolution of Interface Thermal Barrier Coating/DZ411 Ni-based Superalloy

YUAN Hongyuan¹, ZHANG Siqian¹(

), WANG Dong², ZHANG Yingjian³, MA Li³, YU Minghan², ZHANG Haoyu¹, ZHOU Ge¹, CHEN Lijia¹

1 School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
2 Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3 School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China

引用本文:

袁鸿渊, 张思倩, 王栋, 张英建, 马力, 于明涵, 张浩宇, 周舸, 陈立佳. 长时热暴露对一种热障涂层/DZ411镍基高温合金体系界面组织演变的影响[J]. 材料研究学报, 2025, 39(2): 113-125.
Hongyuan YUAN, Siqian ZHANG, Dong WANG, Yingjian ZHANG, Li MA, Minghan YU, Haoyu ZHANG, Ge ZHOU, Lijia CHEN. Effect of Long-term Thermal Exposure on Microstructure Evolution of Interface Thermal Barrier Coating/DZ411 Ni-based Superalloy[J]. Chinese Journal of Materials Research, 2025, 39(2): 113-125.

全文: PDF(45814 KB) HTML

摘要:

将一种热障涂层/DZ411镍基高温合金体系分别在900和1000 ℃进行长时热暴露，使用扫描电子显微镜(SEM)、能谱分析仪(EDS)、透射电子显微镜(TEM)等手段表征涂层/基体界面以研究其微观组织的演变行为。结果表明：随着热暴露时间的延长基体/涂层界面(CSI)下方的基体发生再结晶，σ相的析出方向与CSI呈45°角。在900和1000 ℃热暴露的二次反应区(SRZ)与拓扑密堆相(TCP)的演变显著不同。在900 ℃热暴露100 h后富Cr相弥散分布在混乱的γ'相组成的互扩散区(IDZ)，而在1000 ℃热暴露100 h后IDZ、SRZ由胞状再结晶组成，富Cr相的析出不明显。在900 ℃热暴露500~2000 h后IDZ、SRZ逐渐长大，富Cr相在再结晶晶界附近沿着与CSI呈45°角的方向析出；在1000 ℃热暴露后富Cr相在再结晶晶界下方聚集析出，SRZ逐渐退化为IDZ。长时热暴露后，界面组织的演变与元素的扩散密切相关。

关键词 ：金属材料, 镍基高温合金, 长时热暴露, 界面组织, 涂层/基体界面

Abstract：

Herein, the effect of long term thermal exposure at 900 and 1000 ^oC on the microstructure variation of the interface MCrAlY thermal barrier coating/DZ411 Ni-based directionally solidified superalloy (IC/S)was studied by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). The results indicate that with the extension of thermal exposure time, the substrate beneath the IC/S undergoes recrystallization, the orientation of σ-phase precipitates is 45° respect to the IC/S. Significant differences were observed in the evolution of secondary reaction zone (SRZ) and topologically close-packed (TCP) phases during heating process at 900 ^oC and 1000 ^oC. After being exposed at 900 ^oC for 100 h the granular Cr-rich phase precipitated in the interdiffusion zone (IDZ) composed of chaotically distributed γ'-phase; In contrast, IDZ and SRZ were formed after being exposed at 1000 ^oC for 100 h, and the precipitates of Cr-rich phase were not significant. After being exposed at 900 ^oC for 500 h to 2000 h, IDZ and SRZ gradually grow, and the orientation of Cr-rich phase precipitates nearby the recrystallized grain boundary with an angle 45°; However, at 1000 ^oC the Cr-rich phase precipitates and aggregates below the recrystallized grain boundary, and SRZ gradually degenerates into IDZ. The evolution of interface structure is closely related to the diffusion of elements after long-term heat exposure.

Key words： metallic materials Ni-based superalloy long-term thermal exposure interface microstructure coating/substrate interface

收稿日期: 2024-01-01

ZTFLH:

TG 132.32

基金资助:国家科技重大项目(J2019-IV-0006-0074);国家科技重大项目(J2019-VI-0010-0124);国家自然科学基金(52071219);燃气轮机项目科学中心资助(P2021-AB-IV-001-002)

通讯作者: 张思倩，教授，sqzhang@alum.imr.ac.cn，研究方向为单晶高温合金变形损伤机制

Corresponding author: ZHANG Siqian, Tel: 13700022372, E-mail: sqzhang@alum.imr.ac.cn

作者简介: 袁鸿渊，男，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.026 或 https://www.cjmr.org/CN/Y2025/V39/I2/113

表1 实验合金和涂层的名义成分

图1 喷涂后热障涂层/合金截面形貌、CSI截面形貌及元素分布

表2 涂层中各相的成分

图2 长时热暴露后TBC涂层/合金截面BSE图像

表3 图2中各区元素分布

图3 在900 ℃热暴露不同时间后CSI横截面的BSE图像

图4 900 ℃热暴露100 h后CSI下方横截面的原始形貌、相图、IPF图像以及KAM图

图5 在900 ℃热暴露4500 h后CSI下方横截面的原始形貌、相图、IPF图像以及KAM图

图6 在900 ℃热暴露1000 h后SRZ中和在1000 ℃热暴露1000 h后SDZ中的TEM 图像和选区衍射花样(SAD)

图7 在1000 ℃热暴露不同时间后CSI横截面BSE图像

图8 在1000 ℃下热暴露100 h后CSI下方横截面的原始形貌、相图、IPF图像以及KAM图

图9 在1000 ℃热暴露4500 h后CSI下方横截面的原始形貌、相图、IPF图像以及KAM图

图10 IDZ + SRZ厚度之和随热暴露温度和时间的变化

图11 在<001>方向上受力分解的示意图

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