Thermodynamic Properties and Thermal Cycling Lifetimes of LaMeAl11O19/YSZ Thermal Barrier Coatings

doi:10.15541/jim20220202

Abstract

Abstract:

LaMeAl₁₁O₁₉ ceramics is a kind of thermal barrier coating (TBC) material with promising application prospect due to its unique crystal structure, excellent thermodynamic properties, low thermal conductivity, and high temperature phase stability. Here, LaMeAl₁₁O₁₉/YSZ (Me=Mg, Cu, Zn) thermal barrier coatings were prepared by atmospheric plasma spraying (APS). Failure analysis of the coating was carried out by burner rig test and other analysis techniques. The results show that LaMgAl₁₁O₁₉ (LMA), LaZnAl₁₁O₁₉ (LZA) and LaCuAl₁₁O₁₉ (LCA) powders are decomposed during the plasma spraying, resulting in different contents of magnetoplumbite phase in the coatings, which may be an important factor responsible for their distinction of thermal cycling lifetimes. The LaMeAl₁₁O₁₉ layer is delaminated upon YSZ layer due to mismatch of thermal expansion coefficient between LaMeAl₁₁O₁₉ layer and YSZ layer and volume shrinkage caused by recrystallization of amorphous phase. Then the YSZ layer is exposed high temperature, accelerating sintering and TGO growth, and promoting the delamination of the YSZ layer from the bond coat. At low temperature, with the increase of the atomic number of the divalent Me²⁺, the thermal conductivity of the LaMeAl₁₁O₁₉ decreases. At high temperature, LCA coating has better infrared emissivity (0.88, 600 ℃) than both LMA and LZA, which weakens the contribution of photon conduction to thermal conductivity and leads to the reduction of thermal conductivity. Therefore, LCA coating has potential application in high temperature infrared radiation coating.

Key words: thermal barrier coating, magnetite rare earth hexaaluminate, flame thermal cycling, thermodynamic property

CLC Number:

TB306

WEI Hailang, CAO Xueqiang, DENG Longhui, JIANG Jianing. Thermodynamic Properties and Thermal Cycling Lifetimes of LaMeAl₁₁O₁₉/YSZ Thermal Barrier Coatings[J]. Journal of Inorganic Materials, 2022, 37(12): 1259-1266.

Figures/Tables 10

Table 1 Chemical reagents for main experiments

Chemical reagent	Purity	Manufacturer
La₂O₃	99.9%	Beijing Chemical Works
MgO	99.9%	Jiangsu Hanos Chemical Co., LTD
Al₂O₃	99.9%	Shanghai Chemetall Chemicals Co., LTD
ZnO	99.9%	Hubei Longma Chemical Co., LTD
CuO	99.9%	Nanjing Xincai Chemical Co., LTD
CaO	99.9%	Nanjing Xincai Chemical Co., LTD
Metallographic cold inlay	—	Wuxi Huazheng Metallurgical Technology Co., LTD
Gumacabic powder	AR	Shanghai Sinopharm Group Chemical Reagent Co. LTD
Ammonium citrate tribasic	AR	Beijing Chemical Works

Table 2 Parameters of APS

Item	Bonding layer	Ceramic layer
Spraying distance/mm	100	100
Power/kW	42	42
Current/A	530	530
Plasma gas/SLPM	32/12	32/12
Migration rate/(mm·s⁻¹)	1000	1000
Feed rate/(g·min⁻¹)	30	35

Fig. 1 XRD patterns of three kinds of coatings (a) As-sprayed; (b) After failure

Fig. 2 Thermal expansion curves of freestanding coatings (a) LMA; (b) LZA; (c) LCA

Fig. 3 (a) Thermal conductivity and (b) single band (3-5 µm) infrared emissivity of freestanding coatings at different temperatures

Fig. 4 Vickers hardness and fracture toughness of freestanding coatings

Fig. 5 Temperature changes of surface of coatings and metallic substrate during thermal cycling

Fig. 6 SEM images of cross-sections and top surfaces of as-sprayed coatings (a, a°, b) LMA/YSZ; (c, c°, d) LZA/YSZ; (e, e°, f ) LCA/YSZ

Fig. 7 SEM images of cross-sections and elemental mappings of failed coatings at different positions (a) LMA/YSZ at the center; (b) LMA/YSZ at the edge; (c) LZA/YSZ at the edge; (d) LZA/YSZ at the center; (e) LCA/YSZ at the edge; (f) LCA/YSZ at the center

Fig. 8 Thermal cycle life times of three kinds of coatings

References 20

[1]	徐慧宁, 董洁, 殷国富, 等. 燃气轮机产业现状与技术发展趋势, 机械, 2016, 43(s): 1-6.
[2]	MILLER R A. Current status of thermal barrier coatings-an overview. Surf. Coat. Technol., 1987, 30(1): 1-11. DOI URL
[3]	CLARKE D R, PHILLPOT S R. Thermal barrier coating materials. Mater. Today, 2005, 8(6): 22-29.
[4]	SLIFKA B J, FILLA J M, PHELPS G, et al. Thermal conductivity of a zirconia thermal barrier coating. J. Therm. Spray Technol., 1998, 7(1): 43-46. DOI URL
[5]	WITHEY E, PETORAK C, TRICE R, et al. Design of 7wt% Y₂O₃- ZrO₂/mullite plasma-sprayed composite coatings for increased creep resistance. Journal of the European Ceramic Society, 2008, 27(16): 4675-4683. DOI URL
[6]	KAHN A M, LEJUS M, MADSAC J, et al. Preparation, structure, optical, and magnetic properties of lanthanide aluminate single crystals (LnMAl₁₁O₁₉). J. Appl. Phys., 1981, 52(11): 6864-6869. DOI URL
[7]	GADOW R, LISCHKA M. Lanthanum hexaaluminate-novel thermal barrier coatings for gas turbine applications-materials and process development. Surf. Coat. Technol., 2002, 151(3): 392-400.
[8]	CHEN X L, CAO X Q, ZHANG Y F, 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
[9]	CHEN X L, CAO X Q, ZHANG Y F, et al. Thermal cycling failure of new LaMgAl₁₁O₁₉/YSZ double ceramic topcoat thermal barrier coating systems. Surf. Coat. Technol., 2011, 205(10): 3293-3300. DOI URL
[10]	WANG C, LU H, HUANG Z, et al. Enhanced anti-deliquescent property and ultralow thermal conductivity of magnetoplumbite- type LnMeAl₁₁O₁₉ materials for thermal barrier coating. Journal of the American Ceramic Society, 2018, 101(3): 1095-1104. DOI URL
[11]	刘帆. 磁铅石型稀土六铝酸盐热障涂层的制备及性能研究. 武汉: 武汉理工大学硕士学位论文, 2019.
[12]	RUMPF D B. Thermochemical data of pure substances. Veterinary Immunology and Immunopathology, 1997, 55(4): 359-360. DOI URL
[13]	KINGERY W D, MCQUARRIE M C. Thermal conductivity: concepts of measurement and factors affecting thermal conductivity of ceramic materials. Journal of the American Ceramic Society, 1954, 37(2): 67-72. DOI URL
[14]	BARON A A. Indentation determination of the fracture toughness of steels at various temperatures. Russian Metallurgy (Metally), 2020, 2020(7): 813-816. DOI URL
[15]	CINIBULK M K. Thermal stability of some hexaluminates at 1400 ℃. Journal of Materials Science Letters, 1995, 14(9): 651-654. DOI URL
[16]	XIE X, GUO H, GONG S, et al. Thermal cycling behavior and failure mechanism of LaTi₂Al₉O₁₉/YSZ thermal barrier coatings exposed to gas flame. Surface and Coatings Technology, 2011, 205(17/18): 4291-4298. DOI URL
[17]	SARUHAN B B, KRODER C J. Thermal-insulating material having an essentially magnetoplumbitic crystal structure: US11183818. 2005-10-23.
[18]	COLLONGUES R. Magnetoplumbite-related oxides. Annual Review of Materials Science, 1990, 20(1): 51-82. DOI URL
[19]	LU H R, GUO X J, ZHANG C G, et al. Influence of divalent Me²⁺ on phase structures and thermophysical properties of magnetoplumbite- type LaMgAl₁₁O₁₉. Rare Metal Mat. Eng., 2015, 1(5): 791-794.
[20]	CAO X Q, VASSEN R, STOEVER D. Ceramic materials for thermal barrier coatings. Journal of the European Ceramic Society, 2003, 24(1): 1-10. DOI URL

Thermodynamic Properties and Thermal Cycling Lifetimes of LaMeAl₁₁O₁₉/YSZ Thermal Barrier Coatings

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 20

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	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.
[2]	ZHU Jiatong, LOU Zhihao, ZHANG Ping, ZHAO Jia, MENG Xuanyu, XU Jie, GAO Feng. Preparation and Thermal Properties of Rare Earth Tantalates (RETaO₄) High-Entropy Ceramics [J]. Journal of Inorganic Materials, 2021, 36(4): 411-417.
[3]	JI Xiaojuan,YU Yueguang,LU Xiaoliang. Effects of Impurities on Properties of YSZ Thermal Barrier Coatings [J]. Journal of Inorganic Materials, 2020, 35(6): 669-674.
[4]	Bo-Le MA, Wen MA, Wei HUANG, Yu BAI, Rui-Ling JIA, Hong-Ying DONG. Thermophysical Property of Single-phase Strontium Zirconate Co-doped with Double Rare-earth Oxides as a Thermal Barrier Coating Material [J]. Journal of Inorganic Materials, 2019, 34(4): 394-400.
[5]	WANG Lin, DING Kun-Ying, LIN Xiao-Ping, LI Ze, ZHENG Run-Guo, YANG Lian-Wei. Defect Evolution and Microcracks of 8YSZ Double-layer Thermal Barrier Coatings by Water Immersion Ultrasound Macroscopic Detection [J]. Journal of Inorganic Materials, 2019, 34(12): 1265-1271.
[6]	ZHANG Xiao-Feng, ZHOU Ke-Song, LIU Min, DENG Chun-Ming, DENG Chang-Guang, CHEN Huan-Tao. Thermal Shock Analysis of Surface Al-modified 7YSZ Nano-thermal Barrier Coatin [J]. Journal of Inorganic Materials, 2017, 32(9): 973-979.
[7]	LI Da-Chuan, ZHAO Hua-Yu, ZHONG Xing-Hua, TAO Shun-Yan. Research Progresses of Atmospheric Plasma Sprayed Splat [J]. Journal of Inorganic Materials, 2017, 32(6): 571-580.
[8]	SUN Xu-Xuan, CHEN Hong-Fei, YANG Guang, LIU Bin, GAO Yan-Feng. YSZ- Ti₃AlC₂ Thermal Barrier Coating and Its Self-healing Behavior under High Temperatures [J]. Journal of Inorganic Materials, 2017, 32(12): 1269-1274.
[9]	MA Rong-Bin, CHENG Xu-Dong, ZOU Jun, LI Qing-Yu, HUANG Xia. Toughness and Thermal Shock of SiC Fiber/Yttria-stabilized-zirconia Composite Thick Thermal Barrier Coatings [J]. Journal of Inorganic Materials, 2016, 31(2): 190-194.
[10]	ZHANG Xiao-Feng, ZHOU Ke-Song, ZHANG Ji-Fu, HAN Tao, Song Jin-Bing, LIU-Min. Erosion Failure Mechanism and Model Establishment of Thermal Barrier Coatings Based on Roughness [J]. Journal of Inorganic Materials, 2014, 29(3): 294-300.
[11]	YANG Bin, LI Lin-Yan, FAN Min-Guang, LI Bin, XU Sheng-Ming, WANG Jian-Long, LIN Xu-Ping. Synthesis and Thermophysical Properties of (La_1-_xMg_x)₂Ce₂O_7-_x [J]. Journal of Inorganic Materials, 2014, 29(12): 1301-1305.
[12]	HU Feng, ZHANG Yang-Huan, ZHANG Yin, HOU Zhong-Hui, DONG Zhong-Ping, DENG Lei-Bo. Microstructure and Electrochemical Hydrogen Storage Characteristics of CeMg₁₂+100wt%Ni +Ywt%TiF₃ (Y=0, 3, 5) Alloys Prepared by Ball Milling [J]. Journal of Inorganic Materials, 2013, 28(2): 217-223.
[13]	YANG Jia-Sheng, YU Jian-Hua, ZHONG Xing-Hua, ZHAO Hua-Yu, ZHOU Xia-Ming, TAO Shun-Yan, DING Chuan-Xian. Experimental and Numerical Investigation of Residual Stresses in Plasma-sprayed Thermal Barrier Coatings [J]. Journal of Inorganic Materials, 2013, 28(12): 1381-1386.
[14]	HUA Jia-Jie, ZHANG Li-PENG, LIU Zi-Wei, WANG Yong-Zhe, LIN Chu-Cheng, ZENG Yi, ZHENG Xue-Bing. Progress of Research on the Failure Mechanism of Thermal Barrier Coatings [J]. Journal of Inorganic Materials, 2012, 27(7): 680-686.
[15]	MA Wen, SONG Feng-Yu, DONG Hong-Ying, XU Ping, LUN Wen-Shan, ZHENG Xue-Bin. Thermophysical Properties of Y₂O₃ and Gd₂O₃ Co-doped SrZrO₃ Thermal Barrier Coating Material [J]. Journal of Inorganic Materials, 2012, 27(2): 209-213.