[1]杨佳祥,汪欣,刘艳明,等.Ta10W表面(Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2复合涂层的超高温抗热震性能研究[J].中国材料进展,2026,45(08):080-89.
　YANG Jiaxiang,WANG Xin,LIU Yanming,et al.Study on the Ultra-High Temperature Thermal Shock Resistance of a (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 Composite Coating on Ta10W[J].MATERIALS CHINA,2026,45(08):080-89.
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Ta10W表面(Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2复合涂层的超高温抗热震性能研究()

中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
45
期数:
2026年08
页码:
080-89
栏目:
出版日期:
2026-07-31

文章信息/Info

Title:
Study on the Ultra-High Temperature Thermal Shock Resistance of a (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 Composite Coating on Ta10W
作者:
杨佳祥; 汪欣; 刘艳明; 王子豪; 高翔; 严鹏
1. 西安石油大学材料科学与工程学院，陕西 西安 710016 2. 西北有色金属研究院，陕西 西安 710016
Author(s):
YANG Jiaxiang; WANG Xin; LIU Yanming; WANG Zihao; GAO Xiang; YAN Peng
1.School of Material Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China 2.Northwest Institute for Nonferrous Metal Research, Xi’an 710016,China
关键词:
Ta基合金; 硅化物涂层; 超高温热震; 晶-玻复合氧化膜; 失效机制; 有限元模拟
Keywords:
Ta-based alloy;  silicide coating;  ultra-high-temperature thermal shock;  crystal-glass composite oxide film;  failure mechanism;  finite element simulation
文献标志码:
A
摘要:
钽合金是高超声速飞行器热端部件的重要候选材料，但其在超高温热震环境下面临抗氧化和抗热震稳定性不足的问题。本研究采用料浆喷涂-真空反应烧结工艺，在Ta10W合金表面原位制备了(Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2复合涂层，并研究了其在室温~1600℃和室温~1700℃循环热震条件下的损伤行为及失效机制。制备态涂层由外至内依次为(Ta,Mo)Si2-ZrSi2-(Zr,Ta)C复合陶瓷外层、TaSi2内层和Ta5Si3涂层/基体界面反应层。热震后，涂层表面形成了以SiO2玻璃相为主、ZrO2/Ta2O5晶态氧化物颗粒和残余硅化物颗粒为弥散相的“岛-海”式晶-玻复合氧化膜。涂层在室温~1600℃热震90次和室温~1700℃热震75次后测试区仍保持整体连续。随着热震温度和循环次数增加，涂层内部纵向裂纹以及沿裂纹向内延伸的O元素分布更加明显。与室温~1600℃相比，室温~1700℃热震后涂层氧化产物类型基本相同，但残余硅化物和TaSi2内层退化程度更高，局部裂纹扩展和氧化损伤更加严重。热-结构耦合有限元模拟结果表明，裂纹边缘和裂纹尖端是循环热震过程中的主要应力集中区域，较高的裂纹边缘拉应力促进裂纹张开和扩展，并为O元素内扩散提供短路通道。该复合涂层的热震失效主要受氧化层内部缺陷累积、裂纹扩展、O元素沿缺陷向内扩散以及热应力集中共同控制，而非由氧化膜整体剥落主导。
Abstract:
Tantalum alloys are promising candidate materials for hot-end components of hypersonic vehicles; however, their insufficient oxidation resistance and thermal shock stability under ultra-high-temperature thermal shock conditions remain critical challenges. In this study, a (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 composite coating was in situ prepared on a Ta10W alloy by slurry spraying followed by vacuum reaction sintering, and its damage behavior and failure mechanism under cyclic thermal shock from room temperature to 1600°C and 1700°C were investigated. The as-prepared coating consisted of an outer (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C composite ceramic layer, a TaSi2 inner layer, and a Ta5Si3 coating/substrate interfacial reaction layer. After thermal shock, an “island-sea” crystal-glass composite oxide film was formed on the coating surface, mainly composed of a SiO2 glass phase with dispersed ZrO2/Ta2O5 crystalline oxide particles and residual silicide particles. The tested region of the coating remained overall continuous after 90 cycles from room temperature to 1600°C and 75 cycles from room temperature to 1700°C. With increasing thermal shock temperature and cycle number, vertical cracks inside the coating and inward oxygen diffusion along these cracks became more pronounced. Compared with thermal shock from room temperature to 1600°C, the coating subjected to thermal shock from room temperature to 1700°C exhibited similar oxidation products, but more severe degradation of residual silicides and the TaSi2 inner layer, accompanied by intensified local crack propagation and oxidation damage. Thermal-structural coupled finite element simulations revealed that crack edges and crack tips were the main stress concentration regions during cyclic thermal shock. The high tensile stress at crack edges promoted crack opening and propagation, providing short-circuit pathways for inward oxygen diffusion. Therefore, the thermal shock failure of the composite coating was mainly governed by defect accumulation in the oxide layer, crack propagation, inward oxygen diffusion along defects, and thermal stress concentration, rather than by overall spallation of the oxide film.
更新日期/Last Update: 2026-06-30