TiAl合金表面TiAlCrY/YSZ涂层高温长时间服役性能

doi:10.15541/jim20220327

无机材料学报 ›› 2023, Vol. 38 ›› Issue (1): 105-112.DOI: 10.15541/jim20220327 CSTR: 32189.14.10.15541/jim20220327

所属专题：【结构材料】热障与环境障涂层(202409)

• 研究论文 • 上一篇

TiAl合金表面TiAlCrY/YSZ涂层高温长时间服役性能

潘洋洋¹^,²(), 梁波¹(), 洪督², 祁志祥³, 牛亚然², 郑学斌²

1.燕山大学材料科学与工程学院, 亚稳材料国家重点实验室, 秦皇岛 066004
2.中国科学院上海硅酸盐研究所, 特种无机涂层实验室, 上海 200050
3.南京理工大学材料评价与设计教育部工程研究中心, 先进金属与金属间化合物材料技术工信部重点实验室, 南京 210094

收稿日期:2022-06-11 修回日期:2022-07-26 出版日期:2023-01-20 网络出版日期:2022-08-04
通讯作者: 梁波, 教授. E-mail: liangbo@ysu.edu.cn
作者简介:潘洋洋(1991-), 男, 博士研究生. E-mail: panyangyang4155@163.com
基金资助:
中国科学院国防科技创新基金项目(CXJJ-21S029)

High Temperature Long-term Service Performance of TiAlCrY/YSZ Coating on TiAl Alloy

PAN Yangyang¹^,²(), LIANG Bo¹(), HONG Du², QI Zhixiang³, NIU Yaran², ZHENG Xuebin²

1. State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
2. Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3. MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology, Engineering Research Center of Materials Behavior and Design, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China

Received:2022-06-11 Revised:2022-07-26 Published:2023-01-20 Online:2022-08-04
Contact: LIANG Bo, professor. E-mail: liangbo@ysu.edu.cn
About author:PAN Yangyang (1991-), male, PhD candidate. E-mail: panyangyang4155@163.com
Supported by:
The Basic Research of the Ministry of Science and Technology of the Chinese Academy of Sciences(CXJJ-21S029)

摘要/Abstract

摘要：

TiAl合金具有低密度、高比强度的优异性能, 是一种潜在的航空发动机用结构材料。TiAl合金的服役温度范围为700~900 ℃, 在其表面制备高温热防护涂层可以进一步提高服役温度。本研究采用等离子喷涂技术在TiAl合金表面制备了新型TiAlCrY/YSZ涂层, 并与传统的NiCrAlY/YSZ热障涂层进行高温长时间服役性能对比研究。结果发现, TiAlCrY/YSZ涂层在1100 ℃空气环境中服役300 h保持完好, 表现出良好的高温性能, 而NiCrAlY/YSZ涂层在1100 ℃的服役寿命不足100 h。显微分析结果表明, TiAlCrY黏结层表面会形成一层连续且致密的TGO, 其主要成分为Al₂O₃, 与YSZ涂层的界面兼容性良好。并且TGO在1100 ℃空气环境中服役300 h后, 厚度仍<8 μm。以上研究表明, 与传统NiCrAlY/YSZ热障涂层相比, TiAlCrY/YSZ更适合作为TiAl合金表面的高温热防护涂层。

关键词: TiAl合金, TiAlCrY/YSZ涂层, 等离子喷涂, 高温长时间服役性能

Abstract:

TiAl alloy has excellent properties of low density and high specific strength, which is a potential structural material for aero-engine. The service temperature of TiAl alloy is limited in the range of 700-900 ℃, which is further improved by preparation of high temperature thermal protection coating. In the present work, a new type of TiAlCrY/YSZ coating was prepared on the TiAl alloy by plasma spray technologies, of which long-term service performance at high temperature was compared with the traditional NiCrAlY/YSZ coating. It was found that the TiAlCrY/YSZ coating remained intact after served 300 h at 1100 ℃ in the air, showing excellent high temperature performance, while the service lifetime of the NiCrAlY/YSZ coating at 1100 ℃ was less than 100 h. The microstructure observation found that a continuous and dense TGO composed of Al₂O₃ was continuously formed on the TiAlCrY bonding coating, suggesting that TiAlCrY coating has good interfacial compatibility with the YSZ top coating. Moreover, the thickness of TGO was still less than 8 μm after served 300 h at 1100 ℃ in the air. As compared with traditional NiCrAlY/YSZ coating, the TiAlCrY/YSZ coating is a more suitable high temperature thermal coating ever for TiAl alloys.

Key words: TiAl alloy, TiAlCrY/YSZ coating, plasma spray, high temperature long-term service performance

中图分类号:

TQ174

潘洋洋, 梁波, 洪督, 祁志祥, 牛亚然, 郑学斌. TiAl合金表面TiAlCrY/YSZ涂层高温长时间服役性能[J]. 无机材料学报, 2023, 38(1): 105-112.

PAN Yangyang, LIANG Bo, HONG Du, QI Zhixiang, NIU Yaran, ZHENG Xuebin. High Temperature Long-term Service Performance of TiAlCrY/YSZ Coating on TiAl Alloy[J]. Journal of Inorganic Materials, 2023, 38(1): 105-112.

图/表 10

表1 YSZ、TiAlCrY和NiCrAlY粉体成分(%, 原子分数)

Table 1 Compositions of YSZ, TiAlCrY and NiCrAlY powders (%, in atom)

	Al	Cr	Y	Ti	Ni	Zr	O	Source
TiAlCrY	55.0	20.0	0.4	24.6	—	—	—	Nanjing University of Science and Technology
NiCrAlY	14.5	20.5	1.0	—	64.0	—	—	Institute of Metal Research, Chinese Academy of Sciences
YSZ	—	—	3.7	—	—	30.3	66.0	Sulzer Metco

表2 YSZ、TiAlCrY和NiCrAlY涂层喷涂参数

Table 2 Spray parameters of YSZ, TiAlCrY and NiCrAlY coatings

Coating	Ar/slpm	H₂/slpm	Spray distance/mm	Feed rate/(r·min^-1)	Power/kW	Vacuum pressure/Pa
TiAlCrY/ NiCrAlY	30-40	5-15	200-300	15-30	30-40	1-3
YSZ	30-40	5-15	90-130	15-30	38-48	—

图1 喷涂态YSZ (a~c)和TiAlCrY (d~f)涂层的表面形貌和XRD图谱

Fig. 1 Surface morphologies and XRD patterns of the as-sprayed YSZ (a-c) and TiAlCrY (d-f) coatings

图2 TiAlCrY/YSZ涂层示意图(a)和喷涂态涂层的截面形貌(b, c)

Fig. 2 Diagram (a) and cross-sectional morphologies (b, c) of as-sprayed TiAlCrY/YSZ coating

图3 TiAlCrY/YSZ涂层热处理后的截面形貌(a, b)和EDS结果(c, d)

Fig. 3 Cross-sectional morphologies (a, b) and EDS analyses (c, d) of TiAlCrY/YSZ coating after heat-treatment

图4 TiAlCrY/YSZ涂层经1100 ℃处理100 h (a~d)、200 h (e~h)和300 h (i~l)的截面形貌和EDS分析结果

Fig. 4 Cross-sectional morphologies and EDS results of TiAlCrY/YSZ coating after heat-treatment at 1100 ℃ for 100 h (a-d), 200 h (e-h) and 300 h (i-l)

图5 TiAlCrY涂层经1100 ℃处理100 h的截面形貌(a, c, d)和EDS结果(b)

Fig. 5 Cross-sectional morphologies (a, c, d) and EDS analyse (b) of TiAlCrY coating after heat-treatment at 1100 ℃ for 100 h

图6 iCrAlY/YSZ涂层经1100 ℃处理100 h后的截面形貌(a)和EBSD结果(b, c)

Fig. 6 Cross-sectional morphologies (a) and EBSD results (b, c) of NiCrAlY/YSZ coating after 100 h thermal-treatment at 1100 ℃. Colorful images are available on the website

图7 YSZ 涂层、TiAl 、TiAlCrY 和NiCrAlY 合金在100~ 1100 ℃范围的热膨胀系数

Fig. 7 Thermal expansion coefficients (CTE) of YSZ coating, TiAl, TiAlCrY, and NiCrAlY alloys in the range of 100-1100 ℃

图8 IDZ的EDS结果(a)和IDZ (b)、NiCrAlY(c)、TiAlCrY(d)涂层在4.9 N载荷力下的典型压痕形貌

Fig. 8 EDS results (a) of IDZ and indentation morphologies of IDZ(b), NiCrAlY (c), and TiAlCrY (d) coatings under 4.9 N load

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TiAl合金表面TiAlCrY/YSZ涂层高温长时间服役性能

High Temperature Long-term Service Performance of TiAlCrY/YSZ Coating on TiAl Alloy

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