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RE2SiO5 (RE=Er, Gd, Y, Yb), Which is More Suitable for the Top-Coat of EBCs: A Problem Clarification via Finite Element Simulation Study
X.W. Sun1,2, X. Zhong2, Z.C. Hu1, Y. Liu2, Y. Yang1, L. Wang2
1 Key Lab. for New Type of Functional Materials in Hebei Province, School of Materials Science and Engineering, State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Materials Laminating Fabrication and Inte
2 Integrated Computational Materials Research Centre, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China
received December 21, 2021, received in revised form March 7, 2022, accepted March 16, 2022
Vol. 13, No. 1, Pages 45-64 DOI: 10.4416/JCST2021-00021
Abstract
As an important surface protection method, environmental barrier coatings (EBCs) have been applied in the aerospace industry. In order to prepare advanced EBCs with low residual stress, high bonding strength, excellent anti-oxidation resistance and long service lifetime by means of APS (Atmospheric Plasma Spraying), the finite element method (FEM) has been used to design and optimize the structure of the EBCs, thereby saving on experimental costs and improving investigation efficiency. The current work focuses on the influence of the top-coat layer (RE2SiO5) and the thickness of the corresponding layer on the residual stress of the EBCs. The simulation results revealed that an over-thick top-coat resulted in high residual stress and the thickness of the top-coat should not exceed 170 μm. The simulation results showed that the residual stresses in Er2SiO5 and Y2SiO5 were significantly lower than those in Yb2SiO5 and Gd2SiO5, the maximum axial stress of Er2SiO5, Gd2SiO5, Y2SiO5, Yb2SiO5 is 167 MPa, 191 MPa, 165 MPa, 294 MPa, respectively. It could be concluded that the most suitable top-coat consisted of Y2SiO5 with a thickness of 140 μm, as this produces high-quality coatings based on the current simulation results. The experiment results showed that Y2SiO5 and Er2SiO5 had fewer cracks, indicating a low stress level (142.6 MPa ±4 MPa), which was consistent with the simulation results.
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Keywords
Finite element simulation, environmental barrier coating systems, residual stress, atmospheric plasma spraying, failure mechanism
References
1 Kassem, R., Nasiri, N.A.: A comprehensive study on the mechanical properties of Yb2SiO5 as a potential environmental barrier coating, Surf. Coat. Technol., 426, 127783, (2021).
2 Lee, K.N., Van Roode, M.: Environmental barrier coatings enhance performance of SiC/SiC ceramic matrix composites, Am. Ceram. Soc. Bull., 98, [30],46 – 53, (2019)
3 Lee, K.N., Eldridge, J.I., Robinson R.C.: Residual stresses and their effects on the durability of environmental barrier coatings for SiC ceramics, J. Am. Ceram. Soc., 88, [12], 3483 – 3488, (2005)
4 Archer, T., Berny, M., Beauchêne, P., Beauchene, P., Hild, F.: Creep behavior identification of an environmental barrier coating using full-field measurements, J. Eur. Ceram. Soc., 40, [15], 5704 – 5718, (2020).
5 Gale, L., Harris, S., Pattison, S., Baker, J., Fowler, J.: Development and evaluation of sub-element testing of SiC/SiC ceramic matrix composites at elevated temperatures, J. Eur. Ceram. Soc., 41, [5], 3167 – 3176, (2020).
6 Bakan, E., Mack, E.D., Lobe, S., Koch, D., Vassen, R.: An investigation on burner rig testing of environmental barrier coatings for aerospace applications, J. Eur. Ceram. Soc., 40, [15], 6236 – 6240, (2020).
7 Kunz, W., Klemm, H., Michaelis, A.: Crack-healing in ytterbium silicate filled with silicon carbide particle, J. Eur. Ceram. Soc. 40, [15], 5740 – 5748, (2020).
8 Chen, D., Pegler, A., Dorfman, M.: Environmental barrier coatings using low pressure plasma spray process, J. Eur. Ceram. Soc., 103, [9],4840 – 4845, (2020).
9 Chen, P., Xiao, P., Li, Z., Li, Y., Li, J.W.: Oxidation properties of tri-layer ytterbium-disilicate/mullite/silicon-carbide environment barrier coatings for Cf/SiC composites, Surf. Coat. Technol., 402, 126329, (2020).
10 Yang, H.T., Yang, Y.P., Cao, X.Q., Huang, X.Z., Li, Y.: Thermal shock resistance and bonding strength of tri-layer Yb2SiO5/mullite/Si coating on SiCf/SiC composites, Ceram. Int., 46, [17], 27292 – 27298, (2020).
11 Harder, B.J., Almer, J.D., Weyant, C.M., Lee, K.N., Faber, K.T.: Residual stress analysis of multilayer environmental barrier coatings, J. Am. Ceram. Soc., 92, [2], 452 – 459, (2009).
12 Liu, D., Kyaw, S.T., Flewitt, P.E.J., Seraffon, M., Simms, N.J., Pavier, M., Jones, I.A.: Residual stresses in environmental and thermal barrier coatings on curved superalloy substrates: experimental measurements and modelling, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 606, 117 – 126, (2014).
13 Richards, B.T., Young, K.A., Francqueville, D.F., Sehr, S., Begley, M.R., Wadley, H.N.G.: Response of ytterbium disilicate-silicon environmental barrier coatings to thermal cycling in water vapor, Acta Mater., 106, 1 – 14, (2016).
14 Harder, B.J., Almer, J.D., Weyant, C.M., Lee, K.N., Faber, K.T.: Residual stress analysis of multilayer environmental barrier coatings, J. Am. Ceram. Soc., 92, [2], 452 – 459, (2009).
15 Richards, B.T., Sehr, S., Franqueville, F.D., Begley, M.R., Wadley, H.N.G.: Fracture mechanisms of ytterbium monosilicate environmental barrier coatings during cyclic thermal exposure, Acta Mater., 103, 448 – 460, (2016).
16 Zhong, X., Zhu, T., Niu, Y.R., Zhou, H.J., Zhang, L., Zhang, X.Y., Li, Q.L., Zheng, X.B.: Effect of microstructure evolution and crystal structure on thermal properties for plasma-sprayed RE2SiO5 (RE=Gd, Y, Er) environmental barrier coatings, J. Mater. Sci. Technol., 85, 141 – 151, (2021).
17 Lv, B.W., Jin, X.C., Cao, J., Xu, B.S., Wang, Y.G., Fang, D.N.: Advances in numerical modeling of environmental barrier coating systems for gas turbines, J. Eur. Ceram. Soc. 40, [9], 3363 – 3379, (2020).
18 Tejero-Martin, D., Bennett, C., Hussain, T.: A review on environmental barrier coatings: history, current state of the art and future developments, J. Eur. Ceram. Soc., 41, 1747 – 1768, (2021).
19 Lee, K.N., Waters, D.L., Puleo, B.J., Garg, A., Jennings, W.D., Costa, G., Sacksteder, D.E.: Development of oxide-based high temperature environmental barrier coatings for ceramic matrix composites via the slurry process, J. Eur. Ceram. Soc., 41, [2],1639 – 1653, (2020).
20 Padture, N.P.: Environmental degradation of high-temperature protective coatings for ceramic-matrix composites in gas-turbine engines, NPJ Mater. Degrad., 39, [7], 2409 – 2418, (2019).
21 Padture, N.P.: Advanced structural ceramics in aerospace propulsion, Nat. Mater., 15, [8], 804 – 809, (2016).
22 Pang, M., Zhang, X., Liu, Q., Fu, Y.X., Liu, G., Tan, W.D.: Effect of preheating temperature of the substrate on residual stress of Mo/8YSZ functionally gradient thermal barrier coatings prepared by plasma spraying, Surf. Coat. Technol., 385, 125377, (2020).
23 Ridley, M., McFarland, B., Miller, C., M., Opila, E.: YbPO4: A novel environmental barrier coating candidate with superior thermochemical stability, Materialia, 21, 101289, (2022).
24 Ye, H., Wu, L., Long, M., Lei Tao.: Numerical experimental investigation on dynamic failure characteristics of layered slate, Blasting, 34, [3], 57 – 62(95), (2017).
25 Liu, X., Zhu, J.Q., Han, JC.: Numerical and experimental investigation on thermal shock failure of Y2O3-coated CVD ZnS infrared windows, Int. J. Heat Mass Transf., 124, 124 – 130, (2018).
26 Federer, J.I.: Alumina base coatings for protection of SiC ceramic, J. Mater. Eng., 12, [2], 141 – 149, (1990).
27 Xu, H., Gong, S., Chen, L., Zhang, C.: Failure process of thermal barrier coatings under thermal and mechanical loading, J. Beijing Univ. Aeronaut. Astronaut., 30, [10], 919 – 924, (2004).
28 Zhong, X., Niu, Y.R., Li, H., Zeng, Y., Zheng, X.B., Ding, C.X., Sun, J.L.: Microstructure evolution and thermomechanical properties of plasma-sprayed Yb2SiO5 coating during thermal aging, J. Am. Ceram. Soc., 100, [5], 1896 – 1906, (2017).
29 Liu, X., Zhu, J., Han, J.: Numerical and experimental investigation on thermal shock failure of Y2O3-coated CVD ZnS infrared windows, Int. J. Heat Mass Transf., 124, 124 – 130, (2018).
30 Xu, Y., Hu, X.X., Xu, F.F., Li, K.W.: Rare earth silicate environmental barrier coatings: present status and prospective, Ceram. Int., 43, [8], 5847 – 5855, (2017).
31 Jiang, F., Cheng, L., Wang, Y.: Hot corrosion of RE2SiO5 with different cation substitution under calcium-magnesium-aluminosilicate attack, Ceram. Int., 43, [12], 9019 – 9023, (2017).
32 Summers, D.W., Poerschke, D.L., Park, D., Shaw, J.H., Zok, F.W., Levi, C.G.: Roles of composition and temperature in silicate deposit-induced recession of yttrium disilicate, Acta Mater., 160, 34 – 46, (2018).
33 Poerschke, D.L., Jackson, R.W., Levi, G.C.: Silicate deposit degradation of engineered coatings in gas Turbines: progress toward models and materials solutions, Ann. Rev. Mater. Res., 47, 297 – 330, (2017).
34 Lu, Y., Luo, L., Liu, J., Zhu, C., Wang, Y.G.: Failure mechanism associated with the thermally grown silica scale in environmental barrier coated C/SiC composites, J. Am. Ceram. Soc., 99, [8], 2713 – 2719, (2016).
35 Wang, L., Li, D.C., Yang, J.S., Shao, F., Zhong, X.H., Zhao, H.Y., Yang, K., Tao, S.Y., Wang, Y.: Modeling of thermal properties and failure of thermal barrier coatings with the use of finite element methods: A review, J. Eur. Ceram. Soc., 36, [6], 1313 – 1331, (2016).
36 Wang, L., Shao, F., Zhong, X.H., Ni, J.X., Yang, K., Tao, S.Y., Wang, Y.: Tailoring of self-healing thermal barrier coatings via finite element method, Appl. Surf. Sci., 431, 60 – 74, (2018).
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