热处理温度对LaMgAl11O19涂层热/力学性能的影响

doi:10.15541/jim20210720

无机材料学报 ›› 2022, Vol. 37 ›› Issue (9): 925-932.DOI: 10.15541/jim20210720

所属专题：【结构材料】热障与环境障涂层

• 研究论文 • 下一篇

热处理温度对LaMgAl₁₁O₁₉涂层热/力学性能的影响

安文然(), 黄晶琪, 卢祥荣, 蒋佳宁, 邓龙辉, 曹学强()

武汉理工大学硅酸盐建筑材料国家重点实验室, 武汉 430070

收稿日期:2021-11-22 修回日期:2022-01-19 出版日期:2022-09-20 网络出版日期:2022-02-14
通讯作者: 曹学强, 教授. E-mail: xcao@whut.edu.cn
作者简介:安文然(1996-), 女, 硕士研究生. E-mail: anwenran1019@126.com
基金资助:
国家自然科学基金重点项目(92060201)

Effect of Heat-treatment Temperature on Thermal and Mechanical Properties of LaMgAl₁₁O₁₉ Coating

AN Wenran(), HUANG Jingqi, LU Xiangrong, JIANG Jianing, DENG Longhui, CAO Xueqiang()

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2021-11-22 Revised:2022-01-19 Published:2022-09-20 Online:2022-02-14
Contact: CAO Xueqiang, professor. E-mail: xcao@whut.edu.cn
About author:AN Wenran (1996-), female, Master candidate. E-mail: anwenran1019@126.com
Supported by:
National Natural Science Foundation of China(92060201)

摘要/Abstract

摘要：

大气等离子喷涂制备的LaMgAl₁₁O₁₉ (LMA)热障涂层无定型相含量较高, 会严重影响涂层服役寿命。通过900~1600 ℃不同温度热处理12 h, 研究晶粒尺寸和孔隙率等微观结构和无定形相含量对LMA涂层力学、热物理以及抗热震性能的影响。结果表明: 喷涂态LMA涂层具有900和1163 ℃两个结晶温度点。900 ℃热处理后, LMA涂层中含有较多的无定形相以及最高的孔隙率((18.88±2.15)%), 1000 ℃测试时,具有最低的热扩散系数(0.53 mm²/s); 由于重结晶和烧结作用使得无定型相含量和孔隙率降低, 1100~1400 ℃之间热处理的涂层具有较高的硬度(1100℃时达到最高值(12.08±0.58) GPa); 1300 ℃热处理的涂层中含有大量微米级片状晶, 具有较高的应变容限以及平均热循环寿命(588次); 热处理温度达到1500 ℃时, 由于片状晶平行堆叠, 晶粒厚度迅速增加, 孔隙率增加、力学性能显著降低。热震过程中由于热应力的反复作用, 涂层内出现晶粒破碎和裂纹扩展等现象, 导致涂层最终失效。

关键词: LaMgAl₁₁O₁₉, 热障涂层, 热处理, 热/力学性能

Abstract:

LaMgAl₁₁O₁₉ (LMA) coating prepared by atmospheric plasma spraying has large amounts of amorphous phase, which seriously affects the service life of coating. Effects of microstructure, such as grain size, porosity and amorphous phase content, on mechanical, thermophysical and thermal shock resistance properties of LMA coatings after heat-treatement at 900-1600 ℃ for 12 h were investigated. The results show that the as-sprayed LMA coating possesses two crystallization temperature points, 900 and 1163 ℃. After heat-treatement at 900 ℃, the lowest thermal diffusivity of 0.53 mm²/s was obtained for LMA coating at 1000 ℃ due to the large amount of amorphous phase and the highest porosity of (18.88±2.15)%. LMA coatings, heat-treated at 1100-1400 ℃, exhibited higher hardness owing to reduced amorphous content and porosity through recrystallization and sintering with the maximum hardness of (12.08±0.58) GPa at 1100 ℃. After heat-treatement at 1300 ℃, the coating displayed the highest average thermal cycling life (588 times), which attributed to abundant micron flake crystals with high strain tolerance. When the heat-treatment temperature reached 1500 ℃, the grain thickness increased rapidly due to parallel stacking of lamellar crystals, porosity increased and mechanical properties significantly decreased. During the thermal shock, grain breaking and crack propagation occurred in the coating due to the repeated thermal stress, resulting in final failure of the coating.

Key words: LaMgAl₁₁O₁₉, thermal barrier coating, heat-treatment, thermal and mechanical property

中图分类号:

TB306

安文然, 黄晶琪, 卢祥荣, 蒋佳宁, 邓龙辉, 曹学强. 热处理温度对LaMgAl₁₁O₁₉涂层热/力学性能的影响[J]. 无机材料学报, 2022, 37(9): 925-932.

AN Wenran, HUANG Jingqi, LU Xiangrong, JIANG Jianing, DENG Longhui, CAO Xueqiang. Effect of Heat-treatment Temperature on Thermal and Mechanical Properties of LaMgAl₁₁O₁₉ Coating[J]. Journal of Inorganic Materials, 2022, 37(9): 925-932.

图/表 14

图1 LMA粉末SEM照片

Fig. 1 SEM image of LMA powder

表1 APS喷涂参数

Table 1 Parameters of air plasma spraying

Coating	Spray distance/mm	Power/kW	Current/A	Plasma gas Ar/H₂/slpm*	Gun velocity/(mm∙s^-1)	Feeding rate/(g∙min^-1)
LMA	100	42	620	35/12	800	35

图2 APS制备的LMA涂层的DSC曲线

Fig. 2 DSC curve of LMA coating prepared by APS

图3 不同温度热处理后LMA涂层的XRD图谱

Fig. 3 XRD patterns of LMA coatings after heat-treatement at different temperatures (a) Lrt, L900, L1100; (b) L1200, L1300, L1400, L1500, and L1600; (c) Local magnification XRD patterns at 2θ between 33.5°-37° of (b)

图4 不同温度热处理后LMA涂层的断面SEM照片

Fig. 4 Fractured cross-section morphologies of LMA coatings after heat-treatement at different temperatures (a) Lrt; (b) L900; (c) L1100; (d) L1200; (e) L1300; (f) L1400; (g) L1500; (h) L1600

图5 晶粒的生长活化能

Fig. 5 Activation energy of grain growth

图6 不同温度热处理后LMA涂层截面的SEM照片

Fig. 6 Cross-sectional morphologies of LMA coatings after heat-treatement at different temperatures (a) Lrt; (b) L900; (c) L1100; (d) L1200; (e) L1300; (f) L1400; (g) L1500; (h) L1600

图7 不同温度热处理后涂层的密度和孔隙率

Fig. 7 Density and porosity of coatings after heat-treatement at different temperatures

图8 不同温度热处理后涂层的维氏硬度

Fig. 8 Vickers hardness of coatings after heat-treatement at different temperatures

图9 不同温度热处理后涂层的热物理性能

Fig. 9 Thermophysical properties of coatings after heat-treatement at different temperatures (a) Thermal diffusivity; (b) Thermal conductivity

图10 热震失效前后涂层XRD图谱对比

Fig. 10 Comparisons of XRD patterns of coatings before and after thermal shock (a) Lrt and Lsrt; (b) L900 and Ls900; (c) L1300 and Ls1300; (d) L1600 and Ls1600

图11 涂层热震前后涂层断面的微观结构

Fig. 11 Fractured cross-sectional morphologies of coatings before and after thermal shock (a) Lrt; (a′) Lsrt; (b) L900; (b′) Ls900; (c) L1300; (c′) Ls1300; (d) L1600; (d′) Ls1600

表2 涂层热震失效前后硬度对比

Table 2 Vickers hardness of coatings before and after thermal shock

H_V/GPa	L_rt	L₉₀₀	L₁₃₀₀	L₁₆₀₀
Before	6.61	6.56	11.08	6.76
After	10.12	10.89	12.07	11.01

图12 L1600在不同状态下的(a~c)断面微观结构及(d) XRD图谱

Fig. 12 (a-c) Fractured cross-section morphologies and (d) XRD patterns of L1600 heat-treatement at different conditions (a) L1600; (b) Ls1600; (c) Ls1600-1525

参考文献 25

[1]	CAO X Q, VASSEN R, STOEVER D. Ceramic materials for thermal barrier coatings. Journal of the European Ceramic Society, 2004, 24(1): 1-10. DOI URL
[2]	CLARKE D R, OECHSNER M, PADTURE N P. Thermal-barrier coatings for more efficient gas-turbine engines. MRS Bulletin, 2012, 37(10): 891-902. DOI URL
[3]	CLARKE D R, PHILLPOT S R. Thermal barrier coating materials. Materials Today, 2005, 8(6): 22-29.
[4]	EVANS A G, CLARKE D R, LEVI C G. The influence of oxides on the performance of advanced gas turbines. Journal of the European Ceramic Society, 2008, 28(7): 1405-1419. DOI URL
[5]	MAO W G, LUO J M, DAI C Y, et al. Effect of heat treatment on deformation and mechanical properties of 8mol% yttria-stabilized zirconia by berkovich nanoindentation. Applied Surface Science, 2015, 338: 92-98.
[6]	ZHOU X, HE L M, CAO X Q, et al. La₂(Zr_0.7Ce_0.3)₂O₇ thermal barrier coatings prepared by electron beam-physical vapor deposition that are resistant to high temperature attack by molten silicate. Corrosion Science, 2016, 115(16): 143-151. DOI URL
[7]	ZHOU F F, WANG Y, CUI Z Y, et al. Thermal cycling behavior of nanostructured 8YSZ, SZ/8YSZ and 8CSZ/8YSZ thermal barrier coatings fabricated by atmospheric plasma spraying. Ceramics International, 2017, 43(5): 4102-4111. DOI URL
[8]	HUANG L L, MENG H M, TANG J. Crystallization behavior of plasma-sprayed lanthanide magnesium hexaaluminate coatings. International Journal of Minerals, Metallurgy and Materials, 2014, 21(12): 1247-1253. DOI URL
[9]	LU H R, WANG C A, ZHANG C G, et al. Thermo-physical properties of rare-earth hexaaluminates LnMgAl₁₁O₁₉ (Ln: La, Pr, Nd, Sm, Eu and Gd) magnetoplumbite for advanced thermal barrier coatings. Journal of the European Ceramic Society, 2015, 35(4): 1297-1306. DOI URL
[10]	KINGERY W D, MCQUARRIE M C. Thermal conductivity: i, concepts of measurement and factors affecting thermal conductivity of ceramic materials. Journal of the American Ceramic Society, 1954, 37(2): 67-72. DOI URL
[11]	LIU H Z, OUYANG J H, LIU Z G, et al. Microstructure, thermal shock resistance and thermal emissivity of plasma sprayed LaMAl₁₁O₁₉ (M=Mg, Fe) coatings for metallic thermal protection systems. Applied Surface Science, 2013, 217: 52-59.
[12]	CAO X Q, ZHANG Y F, ZHANG J F, et al. Failure of the plasma-sprayed coating of lanthanum hexaluminate. Journal of the European Ceramic Society, 2008, 28(10): 1979-1986. DOI URL
[13]	SUN J B, WANG J S, ZHOU X, et al. Thermal cycling behavior of the plasma-sprayed coating of lanthanum hexaaluminate. Journal of the European Ceramic Society, 2018, 38(4): 1919-1929. DOI URL
[14]	ZENG J Y, SUN J B, LIANG P P, et al. Heat-treated lanthanum magnesium hexaaluminate coatings exposed to molten calcium- magnesium-alumino-silicate. Ceramics International, 2019, 45(9): 11723-11733. DOI URL
[15]	SUN J B, WANG J S, DONG S J, et al. Effect of heat treatment on microstructure and property of plasma-sprayed lanthanum hexaaluminate coating. Journal of Alloys and Compounds, 2018, 739: 856-865.
[16]	CHAO C Y, REN Z H, ZHU Y H, et al. Self-templated synthesis of single-crystal and single-domain ferroelectric nanoplates. Angewandte Chemie International Edition, 2012, 51(37): 9283-9287. DOI URL
[17]	SUN J B, WANG J S, ZHOU X, et al. Microstructure and thermal cycling behavior of plasma-sprayed LaMgAl₁₁O₁₉ coatings. Ceramics International, 2018, 44(5): 5572-5580. DOI URL
[18]	DOMINGUEZ C, CHEVALIER J, TORRECILLAS R, et al. Microstructure development in calcium hexaluminate. Journal of the European Ceramic Society, 2001, 21(3): 381-387. DOI URL
[19]	SUN X M, DU L Z, LAN H, et al. Study on thermal shock behavior of YSZ abradable sealing coating prepared by mixed solution precursor plasma spraying. Surface & Coatings Technology, 2020, 397: 126045.
[20]	ZHOU X, SONG W J, YUAN J Y, et al. Thermophysical properties and cyclic lifetime of plasma sprayed SrAl₁₂O₁₉ for thermal barrier coating applications. Journal of the American Ceramic Society, 2020, 103(10): 5599-5611. DOI URL
[21]	TARASI F, MEDRAJ M, DOLATABADI A, et al. High- temperature performance of alumina-zirconia composite coatings containing amorphous phases. Advanced Functional Materials, 2011, 21(21): 4143-4151. DOI URL
[22]	CHEN X L, ZHANG Y F, ZHONG X H, et al. Thermal cycling behaviors of the plasma sprayed thermal barrier coatings of hexaluminates with magnetoplumbite structure. Journal of the European Ceramic Society, 2010, 30(7): 1649-1657. DOI URL
[23]	杨晓洁, 常雪婷, 范润华. 快速多重旋转碾压诱导Ti-6Al-4V 表面纳米晶及性能研究. 表面技术, 2021, 50(5): 177-183.
[24]	ARAI Y, INOUE R, KAKISAWA H. Anisotropic crack propagation behavior for the silicon-bond coat layer in a multilayer coated system. International Journal of Applied Ceramic Technology, 2021, 18(3): 947-956. DOI URL
[25]	SONG X M, SUHONEN T, SUN C, et al. Microstructures, microhardness, and crystallization behaviors of amorphous Al₂O₃- YSZ coatings prepared by air plasma spraying. Surface Review and Letters, 2015, 22(4): 1550047. DOI URL

热处理温度对LaMgAl₁₁O₁₉涂层热/力学性能的影响

Effect of Heat-treatment Temperature on Thermal and Mechanical Properties of LaMgAl₁₁O₁₉ Coating

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