[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):741-752.[doi:10.7502/j.issn.1674-3962.202606007]
　YANG Jiaxiang,WANG Xin,LIU Yanming,et al.Ultra-High Temperature Thermal Shock Resistance of (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 Composite Coating on Ta10W Substrate[J].MATERIALS CHINA,2026,45(08):741-752.[doi:10.7502/j.issn.1674-3962.202606007]
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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:
741-752
栏目:
出版日期:
2026-08-08

文章信息/Info

Title:
Ultra-High Temperature Thermal Shock Resistance of (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 Composite Coating on Ta10W Substrate
文章编号:
1674-3962(2026)08-0741-12
作者:
杨佳祥; 汪欣; 刘艳明; 王子豪; 高翔; 严鹏
1. 西北有色金属研究院，陕西 西安 7100162. 西安石油大学材料科学与工程学院，陕西 西安 710065
Author(s):
YANG Jiaxiang; WANG Xin; LIU Yanming; WANG Zihao; GAO Xiang; YAN Peng
1. Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China2. School of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, 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
分类号:
TG174.4
DOI:
10.7502/j.issn.1674-3962.202606007
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。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，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。研究了涂层在室温(RT)~1600 ℃和RT~1700 ℃循环热震条件下的抗热震性能，发现涂层分别在RT~1600 ℃热震90次和RT~1700 ℃热震75次后未发生明显失效，热震后涂层表面形成了以SiO2玻璃相为连续相、以ZrO2/Ta2O5晶态氧化物和残余硅化物颗粒为弥散强化相的“岛-海”式晶-玻复合氧化膜。与在RT~1600 ℃热震相比，涂层在RT~1700 ℃热震后氧化膜中残余硅化物和TaSi2内层退化程度更高，涂层热震和氧化损伤更为严重。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。
Abstract:
Tantalum-based alloys are promising candidate materials for hot-end components in hypersonic vehicles. However, their insufficient oxidation resistance and thermal shock stability under ultra-high temperature thermal shock environments remain critical challenges. In this study, a (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C/TaSi2 composite coating was in situ prepared on the Ta10W alloy substrate by slurry spraying followed by vacuum reaction sintering. The as-prepared coating exhibited a multilayered structure consisting of an outer (Ta,Mo)Si2-ZrSi2-(Zr,Ta)C composite ceramic layer, an inner TaSi2 layer and a Ta5Si3 interfacial reaction layer at the coating/substrate interface. The thermal shock resistance of the coating was investigated under cyclic thermal shock conditions from room temperature (RT) to 1600 ℃ and from RT to 1700 ℃. The coating showed no obvious failure after 90 thermal shock cycles from RT~1600 ℃ and 75 cycles from RT~1700 ℃, respectively. After thermal shock testing, an crystal-glass composite oxide film with “island-sea” microstructure was formed on the coating, consisting of a continuous SiO2 glassy phase as the matrix and ZrO2/Ta2O5 crystalline oxide particles together with residual silicide particles as dispersed reinforcing phases. Compared with the coating subjected to thermal shock from RT~1600 ℃, the coating tested from RT~1700 ℃ exhibited more severe degradation of residual silicides in the oxide film and the TaSi2 inner layer, indicating more pronounced thermal shock and oxidation damage. Thermo-structural coupled finite element simulation results revealed that the crack edges and crack tips were the primary stress concentration regions during cyclic thermal shock. The elevated tensile stress at the crack edges promoted crack opening and propagation, thereby providing short circuit pathways for inward oxygen penetration.

备注/Memo

备注/Memo:
收稿日期：2026-06-07修回日期：2026-06-29基金项目：国家自然科学基金面上项目（52571103）；西安市国家先进稀有金属材料技术创新中心专项项目（25XYJSZX001）第一作者：杨佳祥，男，2000年生，硕士研究生通讯作者：汪欣，男，1987年生，正高级工程师，博士生导师，Email:wangx@alum.imr.ac.cn刘艳明，女，1988年生，副教授，博士生导师，Email:ymliu10s@alum.imr.ac.cn
更新日期/Last Update: 2026-06-30