AI Chat Paper
Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
The lifetime of Si-based environmental barrier coatings (EBCs) is constrained by thermally grown SiO2 oxide layer (SiO2-TGO), which can cause premature cracking and spalling. To address this issue, a new approach for surface modification using aluminum is proposed. The oxidation performance was examined in a 50 vol% H2O–50 vol% O2 environment at 1350 °C for up to 300 h. The results indicate that a dense ytterbium aluminum garnet (YbAG) layer was formed after modification, decreasing the porosity by 80%. Due to the elimination of fast diffusion channels and the low oxygen permeability of YbAG, aluminum modification significantly reduced the growth rate of SiO2-TGO by nearly two orders of magnitude. Consequently, its thickness decreased by more than 70% after 300 h of exposure. A diffusion-controlled oxidation mechanism indicates that the modified dense surface is equivalent to an initial SiO2 layer with a specific thickness, causing a shift in the oxidation time and increasing the oxidation resistance. This research provides valuable insights for designing Si-based EBC with improved lifetimes.
Lee KN, Zhu DM, Lima RS. Perspectives on environmental barrier coatings (EBCs) manufactured via air plasma spray (APS) on ceramic matrix composites (CMCs): A tutorial paper. J Therm Spray Techn 2021, 30: 40–58.
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 2021, 41: 1747–1768.
Padture NP. Advanced structural ceramics in aerospace propulsion. Nat Mater 2016, 15: 804–809.
Hu Q, Wang YC, Guo XJ, et al. Oxidation resistance of SiCf/SiC composites with three-layer environmental barrier coatings up to 1360 °C in air atmosphere. Ceram Int 2022, 48: 9610–9620.
Padture NP. Environmental degradation of high-temperature protective coatings for ceramic–matrix composites in gas-turbine engines. npj Mater Degrad 2019, 3: 11.
Chen PJ, Xiao P, Tang X, et al. Corrosion behavior and failure mechanism of SiC whisker and c-AlPO4 particle-modified novel tri-layer Yb2Si2O7/mullite/SiC coating in burner rig tests. J Adv Ceram 2022, 11: 1901–1917.
Zhong X, Zhu T, Niu YR, et al. 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 2021, 85: 141–151.
Tian ZL, Zhang J, Zhang TY, et al. Towards thermal barrier coating application for rare earth silicates RE2SiO5 (RE = La, Nd, Sm, Eu, and Gd). J Eur Ceram Soc 2019, 39: 1463–1476.
Kitaoka S, Matsudaira T, Yokoe D, et al. Oxygen permeation mechanism in polycrystalline mullite at high temperatures. J Am Ceram Soc 2017, 100: 3217–3226.
Richards BT, Sehr S, Franqueville F De, et al. Fracture mechanisms of ytterbium monosilicate environmental barrier coatings during cyclic thermal exposure. Acta Mater 2016, 103: 448–460.
Lv XR, Yue MK, Feng X, et al. Rare earth monosilicates as oxidation resistant interphase for SiCf/SiC CMC: Investigation of SiCf/Yb2SiO5 model composites. J Adv Ceram 2022, 11: 702–711.
Wu J, Yang WC, Zhang XF, et al. Corrosion behavior of PS-PVD spray Yb2Si2O7 environmental barrier coatings during continuous water vapor exposure. Corros Sci 2023, 210: 110831.
Deijkers JA, Wadley HNG. A duplex bond coat approach to environmental barrier coating systems. Acta Mater 2021, 217: 117167.
Zhang ZY, Xue ZL, Park Y, et al. High-temperature performance of thermal environmental barrier coatings in 90% H2O−10% O2 conditions at 1475 °C. Corros Sci 2023, 224: 111535.
Chen DY. TGO growth behavior in environmental barrier coatings with modified silicon bond coat. J Therm Spray Techn 2024, 33: 174–180.
Sullivan RM. On the oxidation of the silicon bond coat in environmental barrier coatings. J Eur Ceram Soc 2021, 41: 557–562.
Singh S, Nganbe M, Chen KY. Modeling oxygen permeability through topcoat and thermally grown oxide in dense Yb2Si2O7 environmental barrier coatings. J Am Ceram Soc 2021, 104: 6481–6495.
Bakan E, Vaßen R. Oxidation kinetics of atmospheric plasma sprayed environmental barrier coatings. J Eur Ceram Soc 2022, 42: 5122–5128.
Wada M, Matsudaira T, Kawashima N, et al. Mass transfer in polycrystalline ytterbium disilicate under oxygen potential gradients at high temperatures. Acta Mater 2017, 135: 372–381.
Matsudaira T, Wada M, Kawashima N, et al. Mass transfer in polycrystalline ytterbium monosilicate under oxygen potential gradients at high temperatures. J Eur Ceram Soc 2021, 41: 3150–3160.
Zhao GX, Xu BS, Ren K, et al. Oxygen diffusion through environmental barrier coating materials. Ceram Int 2020, 46: 19545–19549.
McCormack S, Cao HT, Martins JP, et al. The effect of porosity, mixed molecular/Knudsen diffusion, and a surface barrier layer on steam corrosion of Yb2Si2O7. Corros Sci 2023, 219: 111238.
Dong L, Liu MJ, Zhang XF, et al. Pressure infiltration of molten aluminum for densification of environmental barrier coatings. J Adv Ceram 2022, 11: 145–157.
Sullivan RM. Reformulation of oxide growth equations for oxidation of silicon bond coat in environmental barrier coating systems. J Eur Ceram Soc 2019, 39: 5403–5409.
Garcia E, Lee H, Sampath S. Phase and microstructure evolution in plasma sprayed Yb2Si2O7 coatings. J Eur Ceram Soc 2019, 39: 1477–1486.
Bakan E, Marcano D, Zhou DP, et al. Yb2Si2O7 environmental barrier coatings deposited by various thermal spray techniques: A preliminary comparative study. J Therm Spray Techn 2017, 26: 1011–1024.
Okawa A, Nguyen ST, Wiff JP, et al. Self-healing ability, strength enhancement, and high-temperature oxidation behavior of silicon carbide-dispersed ytterbium disilicate composite for environmental barrier coatings under isothermal heat treatment. J Eur Ceram Soc 2022, 42: 6170–6181.
Zhang XF, Wang C, Ye RJ, et al. Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition. J Materiomics 2020, 6: 102–108.
Deijkers JA, Begley MR, Wadley HNG. Failure mechanisms in model thermal and environmental barrier coating systems. J Eur Ceram Soc 2022, 42: 5129–5144.
Richards BT, Young KA, Francqueville F De, et al. Response of ytterbium disilicate–silicon environmental barrier coatings to thermal cycling in water vapor. Acta Mater 2016, 106: 1–14.
Lee KN. Yb2Si2O7 environmental barrier coatings with reduced bond coat oxidation rates via chemical modifications for long life. J Am Ceram Soc 2019, 102: 1507–1521.
Yilmaz E, Paksoy AH, Gibson G, et al. Constrained sintering and thermal ageing behaviour of electrophoretically deposited Yb2Si2O7 environmental barrier coating. J Eur Ceram Soc 2023, 43: 6427–6439.
Chen L, Wang WJ, Li JH, et al. Suppressing the phase-transition-induced cracking of SiO2 TGOs by lattice solid solution. J Eur Ceram Soc 2023, 43: 3201–3215.
Deijkers JA, Wadley HNG. Hafnium silicate formation during the reaction of β-cristobalite SiO2 and monoclinic HfO2 particles. J Am Ceram Soc 2020, 103: 5400–5410.
Lee KN, Waters DL, Puleo BJ, et al. Development of oxide-based high temperature environmental barrier coatings for ceramic matrix composites via the slurry process. J Eur Ceram Soc 2021, 41: 1639–1653.
Chao CH, Lu HY. Stress-induced β→α-cristobalite phase transformation in (Na2O+Al2O3)-codoped silica. Mater Sci Eng A 2002, 328: 267–276.
Arnal S, Fourcade S, Mauvy F, et al. Design of a new yttrium silicate environmental barrier coating (EBC) based on the relationship between microstructure, transport properties and protection efficiency. J Eur Ceram Soc 2022, 42: 1061–1076.
Lu YH, Wang YG. Formation and growth of silica layer beneath environmental barrier coatings under water-vapor environment. J Alloys Compd 2018, 739: 817–826.
Stack P, Kane K, Sweet M, et al. Dry air cyclic oxidation of mixed Y/Yb disilicate environmental barrier coatings and bare silica formers. J Eur Ceram Soc 2022, 42: 3345–3350.
Kitaoka S, Matsudaira T, Kawashima N, et al. Mass transfer in Yb3Al5O12 films at high temperatures under oxygen potential gradients. J Eur Ceram Soc 2024, 44: 1188–1201.
517
Views
126
Downloads
0
Crossref
0
Web of Science
0
Scopus
0
CSCD
Altmetrics
This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).
