Interaction and mechanism of sub-micron La₂Zr₂O₇ ceramic with calcium-ferrum-alumina-silicate (CFAS) melt at 1673 K

Abstract

Herein, a sub-micron lanthanum zirconate ceramic (La₂Zr₂O₇, LZO) with a pyrochlore structure was prepared by the sol-gel and high temperature sintering methods. The corrosion behavior and mechanism of calcium-ferrum-alumina-silicate (CFAS) powder (33CaO: 10FeO_1.5: 13AlO_1.5:44SiO₂) on the sub-micron LZO ceramic at 1673 K was investigated. The results indicate that the average grain size of sub-micron LZO ceramic was 895 nm. The CFAS melt rapidly diffused into the interior of the LZO ceramic wafer and reacted with it to generate high melting point rod-shaped Ca₂La₈(SiO₄)₆O₂ apatite and m-ZrO₂ phases, which can effectively hinder further diffusion of CFAS melt, resulting in a slow increase in corrosion depth with corrosion time. After 30 h of CFAS corrosion at 1673 K, the corrosion depth of the LZO ceramic wafer was only 160.3 µm, demonstrating its excellent high-temperature resistance to CFAS corrosion.

Keywords

La₂Zr₂O₇ / calcium-ferrum-alumina-silicate (CFAS) / high-temperature / corrosion mechanism

References

[1] Li Y, Sun Z-p, He L, et al.. Thermal corrosion behavior of Yb₄Hf₃O₁₂ exposed to Na₂SO₄+V₂O₅ molten salt [J]. Journal of Alloys and Compounds, 2024, 1008: 176501

[2] Li Y, Xiao P, Luo H, et al.. Fatigue behavior and residual strength evolution of 2.5D C/C-SiC composites [J]. Journal of the European Ceramic Society, 2016, 36(16): 3977-3985

[3] Chen P-j, Xiao P, Li Z, et al.. Microstructure and oxidation behavior of a novel bilayer (c-AlPO₄-SiC_w-mullite)/SiC coating for carbon fiber reinforced CMCs [J]. Journal of the European Ceramic Society, 2019, 39(143988-3999

[4] Zhang S-b, Qin H-l, Li Z, et al.. In-situ observation of damage evolution in Mo-SiC_f/SiC heterogeneous composite [J]. Composites Part B: Engineering, 2023, 264: 110901

[5] Chen S-a, Chen P-j, Duan J-j, et al.. Thermal cycling behavior of bi-layer Yb₂Si₂O₇/SiC EBC-coated C_f/SiC composites in burner rig tests [J]. Advanced Composites and Hybrid Materials, 2022, 5(3): 2184-2192

[6] Duan J-j, Chen M-l, Wang J-j, et al.. Microstructure and wet-oxygen corrosion behaviors of in-suit grown Y₃Si₂C₂ modified SiC_f/SiC composites [J]. Journal of the European Ceramic Society, 2025, 45(2116882

[7] Chen P-j, Xiao P, Li Z, et al.. Wet-oxygen corrosion resistance and mechanism of bi-layer Mullite/SiC coating for C_f/SiC composites [J]. Ceramics International, 2022, 48(2131428-31437

[8] Duan J-j, Chen Y, Wang J-j, et al.. In-situ grown Y₃Si₂C₂ on RB-SiC ceramic for enhanced wet-oxygen corrosion resistance [J]. Ceramics International, 2024, 50(24): 56086-56098

[9] Chen P-j, Xiao P, Li Z, et al.. Water vapor corrosion behavior and failure mechanism of air sprayed bi-layer Yb₂Si₂O₇/SiC and tri-layer Yb₂Si₂O₇/(SiC_w-mullite)/SiC environmental barrier coating [J]. Advanced Powder Materials, 2023, 2(1): 100064

[10] Pan L, Chen P-j, Xiao P, et al.. Effect of SiC whiskers on the anti-oxidation properties of Yb₂Si₂O₇/mullite/ SiC tri-layer environmental barrier coating for CMCs [J]. International Journal of Applied Ceramic Technology, 2023, 20(31740-1752

[11] Chen P-j, Pan L, Xiao P, et al.. Microstructure and anti-oxidation properties of Yb₂Si₂O₇/SiC bilayer coating for C/SiC composites [J]. Ceramics International, 2019, 45(18): 24221-24229

[12] Iqbal A, Moskal G, Głowacka H M, et al.. Phase decompositions of Gd₂Zr₂O₇ + 8YSZ TBC systems under the condition of long-term high-temperature oxidation [J]. Surface and Coatings Technology, 2023, 462: 129471

[13] Chen P-j, Xiao P, Li Z, et al.. Oxidation properties of tri-layer ytterbium-disilicate/mullite/silicon-carbide environment barrier coatings for C_f/SiC composites [J]. Surface and Coatings Technology, 2020, 402: 126329

[14] Qian Y-b, Zhang W-g, Ge M, et al.. Frictional response of a novel C/C-ZrB₂-ZrC-SiC composite under simulated braking [J]. Journal of Advanced Ceramics, 2013, 2(2): 157-161

[15] Chen P-j, Xiao P, Li Z, et al.. Bonding strength and thermal shock resistance of a novel bilayer (c-AlPO₄-SiC_w-mullite)/SiC coated carbon fiber reinforced CMCs [J]. Journal of the American Ceramic Society, 2020, 103(182-93

[16] Chen P-j, He L, Pan L, et al.. Corrosion behavior of Gd₂Hf₂O₇ ceramic exposed to Calcium-Ferrum-Alumina-Silicate (CFAS) melt at 1673 K [J]. Ceramics International, 2024, 50(23): 51437-51446

[17] Liu B, Liu Y-c, Zhu C-h, et al.. Advances on strategies for searching for next generation thermal barrier coating materials [J]. Journal of Materials Science & Technology, 2019, 35(5): 833-851

[18] Poerschke D L, Levi C G. Effects of cation substitution and temperature on the interaction between thermal barrier oxides and molten CMAS [J]. Journal of the European Ceramic Society, 2015, 35(2): 681-691

[19] Huo K, Dai F-z, Qian W, et al.. Hot corrosion behavior of APS YSZ coatings treated by laser micro glazing (LMG) under molten salts (V₂O₅+Na₂SO₄) [J]. Corrosion Science, 2022, 209: 110731

[20] Liang T-q, Huang Z-h, Li M-h, et al.. Thermochemical reaction behavior between Y₂O₃ and calcium-magnesium-aluminosilicate (CMAS) at elevated temperature [J]. Corrosion Science, 2022, 208: 110631

[21] Qiao X, Wang Y M, Weng W X, et al.. Influence of pores on mechanical properties of plasma sprayed coatings: Case study of YSZ thermal barrier coatings [J]. Ceramics International, 2018, 44(17): 21564-21577

[22] Chen P-j, 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]. Journal of Advanced Ceramics, 2022, 11(121901-1917

[23] Wen Z-l, Xiao P, Li Z, et al.. Microstructure and oxidation behavior of Sol-gel mullite coating on SiC-coated carbon/carbon composites [J]. Journal of the European Ceramic Society, 2015, 35(14): 3789-3796

[24] Chen X, Li Y, Zhou W, et al.. Interaction of Yb₂Si₂O₇ environmental barrier coating material with Calcium-Ferrum-Alumina-Silicate (CFAS) at high temperature [J]. Ceramics International, 2021, 47(22): 31625-31637

[25] Chen P-j, Xiao P, Li Z, et al.. Effect of residual silicon on the oxidation resistance of bilayer Yb₂Si₂O₇/SiC coated C/SiC composites at high temperature [J]. Corrosion Science, 2020, 170: 108676

[26] Chen P-j, Xiao P, Tian T, et al.. Oxidation protection of tri-layer La₂Zr₂O₇/Yb₂Si₂O₇/SiC-coated C_f/SiC composites at high temperature [J]. International Journal of Applied Ceramic Technology, 2024, 21(6): 4014-4025

[27] Chen P-j, Xiao P, Li Z, et al.. Thermal cycling behavior of La₂Zr₂O₇/Yb₂Si₂O₇/SiC coated PIP C_f/SiC composites under burner rig tests [J]. Journal of the European Ceramic Society, 2021, 41(74058-4066

[28] Morelli S, Bursich S, Testa V, et al.. CMAS corrosion and thermal cycling fatigue resistance of alternative thermal barrier coating materials and architectures: A comparative evaluation [J]. Surface and Coatings Technology, 2022, 439: 128433

[29] Yan R-x, Liang W-p, Miao Q, et al.. Mechanical, thermal and CMAS resistance properties of high-entropy (Gd_0.2Y_0.2Er_0.2Tm_0.2Yb_0.2)₂Zr₂O₇ ceramics [J]. Ceramics International, 2023, 49(12): 20729-20741

[30] Chen L, Li B-h, Feng J. Rare-earth tantalates for next-generation thermal barrier coatings [J]. Progress in Materials Science, 2024, 144: 101265

[31] Van Sluytman J S, Krämer S, Tolpygo V K, et al.. Microstructure evolution of ZrO₂-YbTaO₄ thermal barrier coatings [J]. Acta Materialia, 2015, 96: 133-142

[32] Chen P-j, Tang X, Liao J-j, et al.. Phase evolution and aqueous durability of nanograin Gd₂Hf₂O₇ ceramic as a potential nuclear waste immobilization matrix [J]. Ceramics International, 2023, 49(1423206-23214

[33] Yang P, An Y-l, Yang D-y, et al.. Structure, thermal properties and hot corrosion behaviors of Gd₂Hf₂O₇ as a potential thermal barrier coating material [J]. Ceramics International, 2020, 46(13): 21367-21377

[34] Chen P-j, Tian T, Zhang C-z, et al.. Effect of Ce-doping on the phase composition and aqueous stability of Gd₂Hf₂O₇ ceramic as nuclear waste forms [J]. Ceramics International, 2023, 49(23): 38556-38565

[35] Che J-w, Liu X-y, Wang X-z, et al.. Influence of B-site substituent Ce on thermophysical, oxygen diffusion, and mechanical properties of La₂Zr₂O₇ [J]. Ceramics International, 2023, 49(7): 10936-10945

[36] Du Y-x, Fei C-g, Qian Z-q, et al.. Simulation analysis of thermal insulation performance of diesel engine piston based on PEO and La₂Zr₂O₇ thermal barrier coating [J]. Case Studies in Thermal Engineering, 2024, 59: 104460

[37] Schelling P K, Phillpot S R, Grimes R W. Optimum pyrochlore compositions for low thermal conductivity [J]. Philosophical Magazine Letters, 2004, 84(2): 127-137

[38] Yi H, Che J-w, Xu Z-h, et al.. Sintering resistance of La₂Ce₂O₇, La₂Zr₂O₇, and yttria stabilized zirconia ceramics [J]. Ceramics International, 2021, 47(34197-4205

[39] Jin L, Yu Q-h, Rauf A, et al.. Elastic, electronic and thermal properties of YSZ from first principles [J]. Solid State Sciences, 2012, 14(1): 106-110

[40] Liu B, Wang J Y, Zhou Y C, et al.. Theoretical elastic stiffness, structure stability and thermal conductivity of La₂Zr₂O₇ pyrochlore [J]. Acta Materialia, 2007, 55(9): 2949-2957

[41] Wang Y-h, Ma Z, Liu L, et al.. Reaction products of Sm₂Zr₂O₇ with calcium-magnesium-aluminum-silicate (CMAS) and their evolution [J]. Journal of Advanced Ceramics, 2021, 10(6): 1389-1397

[42] He L, Pan L, Zhou W, et al.. Corrosion behavior of Yb₄Hf₃O₁₂ ceramics exposed to Calcium-Ferrum-Alumina-Silicate (CFAS) coupled with water vapor at 1400 °C [J]. Corrosion Science, 2023, 214: 110954

[43] Schulz U, Braue W. Degradation of La₂Zr₂O₇ and other novel EB-PVD thermal barrier coatings by CMAS (CaO-MgO-Al₂O₃-SiO₂) and volcanic ash deposits [J]. Surface and Coatings Technology, 2013, 235: 165-173

[44] Ma W-y, Luo Y-b, Ma Z, et al.. La₂Zr₂O₇ based high entropy ceramic with a low thermal conductivity and enhanced CMAS corrosion resistance [J]. Ceramics International, 2023, 49(18): 29729-29735

[45] He L, Pan L, Zhou W, et al.. Interaction and infiltration behavior between calcium-ferrum-alumina-silicate and Yb₄Hf₃O₁₂ ceramics at various temperatures [J]. Journal of the American Ceramic Society, 2024, 107(1): 475-487

[46] Müller D, Hess K U, Kueppers U, et al.. Rheological and chemical interaction between volcanic ash and thermal barrier coatings [J]. Surface and Coatings Technology, 2021, 412: 127049

[47] Delmelle P, Lambert M, Dufrêne Y, et al.. Gas/aerosol-ash interaction in volcanic plumes: New insights from surface analyses of fine ash particles [J]. Earth and Planetary Science Letters, 2007, 259(12): 159-170

[48] Braue W, Mechnich P. Recession of an EB-PVDYSZ coated turbine blade by CaSO₄ and Fe, Ti-rich CMAS-type deposits [J]. Journal of the American Ceramic Society, 2011, 94(124483-4489

[49] Naraparaju R, Gomez Chavez J J, Schulz U, et al.. Interaction and infiltration behavior of Eyjafjallajökull, Sakurajima volcanic ashes and a synthetic CMAS containing FeO with/in EB-PVD ZrO 2–65 wt% Y₂O₃ coating at high temperature [J]. Acta Materialia, 2017, 136: 164-180

[50] Wang Y-h, Ma Z, Liu L, et al.. Influence of the grain size on CMAS attack of Sm₂Zr₂O₇ ceramic [J]. Ceramics International, 2021, 47(17): 24453-24457

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