Influence of Y2O3 and Ta2O5 Co-doping on Microstructure and Thermal Conductivity of Gd2Zr2O7 Ceramics
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Abstract
Rare earth zirconates (RE2Zr2O7) are considered as a class of potential high-temperature structural materials. In this paper, a series of Y2O3 and Ta2O5 co-doped Gd2Zr2O7 [(Gd1−xYx)2(Zr1−xTax)2O7+x, x = 0, 0.1, 0.2, 0.3, 0.4] ceramics were prepared by solid-state reaction sintering in order to clarify the influence of Y2O3 and Ta2O5 co-doped on microstructure, Young’s modulus and thermal conductivity. The results showed that Y2O3 and Ta2O5 co-doped Gd2Zr2O7 exhibited a single pyrochlore structure, and a small amount of Y3+ ions were doped into the Zr4+ ions lattice. The Young’s moduli of doped Gd2Zr2O7 ceramics slightly change with the increase in Y2O3 and Ta2O5 doping concentration. The minimum thermal conductivities of the specimens were obtained at 800 °C. The thermal conductivity of doped Gd2Zr2O7 with x = 0.3 is lower than that of others among the doped specimens, which is around 1.41 W m−1 K−1 at 800 °C. In addition, (Gd0.7Y0.3)2(Zr0.7Ta0.3)2O7.3 ceramic exhibits excellent phase stability from room temperature to 1550 °C.
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OpenAlex topics: Nuclear materials and radiation effects · Nuclear Materials and Properties · Advanced ceramic materials synthesis
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References (33)
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1. L. Minervini, R.W. Grimes, and K.E. Sickafus, Disorder in Pyrochlore Oxides, J. Am. Ceram. Soc., 2010, 83(8), p 1873–187810.1111/j.1151-2916.2000.tb01484.x ↗
2. Robert Vaßen, M.O. Jarligo, T. Steinke et al., Overview on Advanced Thermal Barrier Coatings, Surf. Coat. Technol., 2010, 205(4), p 938–94210.1016/j.surfcoat.2010.08.151 ↗
3. Y. Zhang, M. Xie, F. Zhou et al., Influence of Er Substitution for La on the Thermal Conductivity of (La1−xErx)2Zr2O7 Pyrochlores, Mater. Res. Bull., 2015, 64, p 175–18110.1016/j.materresbull.2014.12.064 ↗
4. Z.G. Liu, J.H. Ouyang, Y. Zhou et al., Influence of Ytterbium- and Samarium-Oxides Codoping on Structure and Thermal Conductivity of Zirconate Ceramics, J. Eur. Ceram. Soc., 2009, 29(4), p 647–65210.1016/j.jeurceramsoc.2008.07.033 ↗
5. C. Wang, L. Guo, Y. Zhang et al., Enhanced Thermal Expansion and Fracture Toughness of Sc2O3-doped Gd2Zr2O7 Ceramics, Ceram. Int., 2015, 41(9), p 10730–1073510.1016/j.ceramint.2015.05.008 ↗
6. C.A. Taylor, M.K. Patel, J.A. Aguiar et al., Bubble Formation and Lattice Parameter Changes Resulting from He Irradiation of Defect-Fluorite Gd2Zr2O7, Acta Mater., 2016, 115, p 115–12210.1016/j.actamat.2016.05.045 ↗
7. F.N. Sayed, B.P. Mandal, D. Jain et al., Improved Ionic Conductivity in NdGdZr2O7: Influence of Sc3+ Substitution, J. Eur. Ceram. Soc., 2012, 32(12), p 3221–322810.1016/j.jeurceramsoc.2012.03.038 ↗
8. L. Guo, H. Guo, H. Peng et al., Thermophysical Properties of Yb2O3 Doped Gd2Zr2O7 and Thermal Cycling Durability of (Gd0.9Yb0.1)2Zr2O7/YSZ Thermal Barrier Coatings, J. Eur. Ceram. Soc., 2014, 34(5), p 1255–126310.1016/j.jeurceramsoc.2013.11.035 ↗
9. J.M. Drexler, A.L. Ortiz, and N.P. Padture, Composition Effects of Thermal Barrier Coating Ceramics on Their Interaction with Molten Ca–Mg–Al–silicate (CMAS) Glass, Acta Mater., 2012, 60(15), p 5437–544710.1016/j.actamat.2012.06.053 ↗
10. X. Wang, L. Guo, H. Zhang et al., Structural Evolution and Thermal Conductivities of (Gd1−xYbx)2Zr2O7 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1) Ceramics for Thermal Barrier Coatings, Ceram. Int., 2015, 41(10), p 12621–1262510.1016/j.ceramint.2015.06.090 ↗
11. C. Wan, Z. Qu, A. Du et al., Influence of B Site Substituent Ti on the Structure and Thermophysical Properties of A2B2O7-Type Pyrochlore Gd2Zr2O7, Acta Mater., 2009, 57(16), p 4782–478910.1016/j.actamat.2009.06.040 ↗
12. Z.G. Liu, J.H. Ouyang, and Y. Zhou, Preparation and Thermophysical Properties of (NdxGd1−x)2Zr2O7 Ceramics, J. Mater. Sci., 2008, 43(10), p 3596–360310.1007/s10853-008-2570-9 ↗
13. Z.G. Liu, J.H. Ouyang, and Y. Zhou, Structural Evolution and Thermophysical Properties of (SmxGd1−x)2Zr2O7 (0 ≤ x≤1.0) Ceramics, J. Alloys Compd., 2009, 472(1), p 319–32410.1016/j.jallcom.2008.04.042 ↗
14. A.N. Radhakrishnan, P. Prabhakar Rao, S.K. Mahesh et al., Role of Bond Strength on the Lattice Thermal Expansion and Oxide Ion Conductivity in Quaternary Pyrochlore Solid Solutions, Inorg. Chem., 2012, 51(4), p 2409–241910.1021/ic202383f ↗
15. A.N. Radhakrishnan, P.P. Rao, K.S. Sibi et al., Order–Disorder Phase Transformations in Quaternary Pyrochlore Oxide System: Investigated by X-Ray Diffraction, Transmission Electron Microscopy and Raman Spectroscopic Techniques, J. Solid State Chem., 2009, 182(8), p 2312–231810.1016/j.jssc.2009.06.016 ↗
16. M. Zhao, X. Ren, and W. Pan, Mechanical and Thermal Properties of Simultaneously Substituted Pyrochlore Compounds (Ca2Nb2O7)x(Gd2Zr2O7)1−x, J. Eur. Ceram. Soc., 2015, 35(3), p 1055–106110.1016/j.jeurceramsoc.2014.10.009 ↗
17. X. Shu, L. Fan, X. Lu et al., Structure and Performance Evolution of the System (Gd1−xNdx)2(Zr1−yCey)2O7 (0 ≤ x, y ≤ 1.0), J. Eur. Ceram. Soc., 2015, 35(11), p 3095–310210.1016/j.jeurceramsoc.2015.04.037 ↗
18. Y. Wang, F. Yang, and P. Xiao, Glass-Like Thermal Conductivities in (La1−x1Yx1)2 (Zr1−x2Yx2)2O7-x2 (x = x1 + x2, 0 ≤ x≤1.0) Solid Solutions, Acta Mater., 2012, 60(20), p 7024–703310.1016/j.actamat.2012.08.063 ↗
19. J.S. Van Sluytman, S. Krämer, V.K. Tolpygo et al., Microstructure Evolution of ZrO2-YbTaO4 Thermal Barrier Coatings, Acta Mater., 2015, 96, p 133–14210.1016/j.actamat.2015.06.007 ↗
20. X. Song, M. Xie, S. An et al., Structure and Thermal Properties of ZrO2-Ta2O5-Y2O3-Ln2O3 (Ln = Nd, Sm or Gd) Ceramics for Thermal Barrier Coatings, Scripta Mater., 2010, 62(11), p 879–88210.1016/j.scriptamat.2010.02.033 ↗
21. L. Sun, H. Guo, H. Peng et al., Phase Stability and Thermal Conductivity of Ytterbia and Yttria Co-doped Zirconia, Prog. Nat. Sci. Mater. Int., 2013, 23(4), p 440–44510.1016/j.pnsc.2013.06.013 ↗
22. Z. Qu, C. Wan, and W. Pan, Thermophysical Properties of Rare-Earth Stannates: Effect of Pyrochlore Structure, Acta Mater., 2012, 60(6), p 2939–294910.1016/j.actamat.2012.01.057 ↗
23. Z. Qu, C. Wan, and W. Pan, Thermal Expansion and defect Chemistry of MgO-Doped Sm2Zr2O7, Chem. Mater., 2007, 19(20), p 4913–491810.1021/cm071615z ↗
24. M.T. Vandenborre, E. Husson, J.P. Chatry et al., Rare-Earth Titanates and Stannates of Pyrochlore Structure; Vibrational Spectra and Force Fields, J. Raman Spectrosc., 1983, 14(2), p 63–7110.1002/jrs.1250140202 ↗
25. L. Guo, Y. Zhang, and F. Ye, Phase Structure Evolution and Thermo-Physical Properties of Nonstoichiometry Nd2−xZr2+xO7+x/2 Pyrochlore Ceramics, J. Am. Ceram. Soc., 2015, 98(3), p 1013–101810.1111/jace.13374 ↗
26. N.P. Padture, M. Gell, and E.H. Jordan, Thermal Barrier Coatings for Gasturbine Engine Applications, Science, 2002, 296(4), p 280–28410.1126/science.1068609 ↗
27. J. Wu, X. Wei, N.P. Padture et al., Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications, J. Am. Ceram. Soc., 2002, 85(12), p 3031–303510.1111/j.1151-2916.2002.tb00574.x ↗
28. K.V.G. Kutty, S. Rajagopalan, C.K. Mathews et al., Thermal Expansion Behaviour of Some Rare Earth Oxide Pyrochlores, Mater. Res. Bull., 1994, 29(7), p 759–76610.1016/0025-5408(94)90201-1 ↗
29. Y.J. Liang, Y.C. Che, and X.X. Liu, Manual of Practical Inorganic Matter Thermodynamics, Northeastern University Press, Shenyang, 1993
30. H.R. Lu, C.A. Wang, and C.G. Zhang, Influence of Ln3+ and B3+ Ions Co-Substitution on Thermophysical Properties of LnMB11O19-type Magnetoplumbite LaMgAl11O19 for Advanced Thermal Barrier Coatings, J. Am. Ceram. Soc., 2013, 96(4), p 1063–106610.1111/jace.12290 ↗
31. D.R. Clarke, Materials Selection Guidelines for Low Thermal Conductivity Thermal Barrier Coatings, Surf. Coat. Technol., 2003, 163, p 67–7410.1016/S0257-8972(02)00593-5 ↗
32. L. Guo, H. Guo, S. Gong et al., Improvement on the Phase Stability, Mechanical Properties and Thermal Insulation of Y2O3-Stabilized ZrO2 by Gd2O3 and Yb2O3 Co-doping, Ceram. Int., 2013, 39(8), p 9009–901510.1016/j.ceramint.2013.04.103 ↗
33. M.R. Loghman-Estarki, R.S. Razavi, and H. Jamali, Thermal Behavior Comparison of Plasma Sprayed Nanostructured 7YSZ, 15YSZ and 5.5SYSZ Coatings at Elevated Temperatures, Ceram. Int., 2016, 42(13), p 14374–1438310.1016/j.ceramint.2016.05.203 ↗