Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-19T16:32:09.440Z Has data issue: false hasContentIssue false
  • English
  • Français

The thermophysical properties and defect chemistry of HfO2–Sm3TaO7 ceramics

Published online by Cambridge University Press:  08 July 2020

Ying Zhou Open the ORCID record for Ying Zhou [Opens in a new window] ,
Guoyou Gan ,
Zhenhua Ge ,
Jing Feng  and
Peng Song
Ying Zhou*
Affiliation:
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming650093, People's Republic of China Yunnan Provincial Academy of Science and Technology, Kunming650093, People's Republic of China
Guoyou Gan
Affiliation:
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming650093, People's Republic of China
Zhenhua Ge
Affiliation:
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming650093, People's Republic of China
Jing Feng
Affiliation:
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming650093, People's Republic of China
Peng Song
Affiliation:
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming650093, People's Republic of China
*
a)Address all correspondence to this author. e-mail: zhouying602@126.com
Get access

Abstract

HfO2–Sm3TaO7 ceramics are prepared through a solid-state reaction method. The X-ray diffraction and structural refinement show that the phase structures of HfO2–Sm3TaO7 ceramics are an ordered orthorhombic phase and the space groups are belonging to Ccmm. The degree of the structural disorder increases with increasing HfO2 content. The solid solution mechanism reveals that Hf4+ exists in the form of interstitial ions that cause crystal expansion when the doping content is less than 4 mol%. When the doping concentration of HfO2 ≥ 4 mol%, the Hf4+ ions can substitute an equal number of Sm3+ and Ta5+ ions. The phase transition of Sm3TaO7 ceramics is removed with increasing HfO2 content, and the 8 mol% HfO2–Sm3TaO7 ceramics have a high thermal expansion coefficient of 10.2 × 10−6 K−1 at 1200 °C. The 2 mol% HfO2–Sm3TaO7 ceramics have the lowest thermal conductivity (1.03 W/m K at 900 °C), which is lower than previous research of the 7–8 YSZ. The outstanding thermophysical properties of HfO2–Sm3TaO7 ceramics indicate that they are potential thermal-barrier coating materials.

Keywords

HfO2–Sm3TaO7 ceramicssolid solution mechanismthermophysical properties
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 16 , 28 August 2020 , pp. 2230 - 2238
Check for updates
Copyright
Copyright © Materials Research Society 2020

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Rahaman, M.N., Gross, J.R., Dutton, R.E., and Wang, H.: Phase stability, sintering, and thermal conductivity of plasma-sprayed ZrO2-Gd2O3 compositions for potential thermal barrier coating applications. Acta Mater. 54, 1615 (2006).CrossRefGoogle Scholar
Feng, J., Xiao, B., Zhou, R., and Pan, W.: Thermal conductivity of rare earth zirconate pyrochlore from first principles. Scr. Mater. 68, 727 (2013).CrossRefGoogle Scholar
Vassen, R., Cao, X.Q., Tietz, F., and Basu, D.: Zirconates as new materials for thermal barrier coatings. ChemInform 83, 2023 (2000).Google Scholar
Cao, X.Q., Vassen, R., and Stoever, D.: Ceramic materials for thermal barrier coatings. J. Eur. Ceram. Soc. 24, 1 (2004).CrossRefGoogle Scholar
Maloney, M.J.: Thermal barrier coating systems and materials. U.S. Patent No. 6,284,2001.Google Scholar
Qu, Z.X., Wan, C.L., and Pan, W.: Thermophysical properties of rare-earth stannates: effect of the pyrochlore structure. Acta Mater. 60, 2939 (2012).CrossRefGoogle Scholar
Abe, R., Higashi, M., Zou, Z.G., Sayama, K., Abe, Y., and Arakawa, H.: Photocatalytic water splitting into H2 and O2 over R3TaO7 and R3NbO7 (R = Y, Yb, Gd, La): Effect of crystal structure on photocatalytic activity. J. Phys. Chem. B 108, 811 (2004).CrossRefGoogle Scholar
Cai, L. and Nino, J.C.: Structure and dielectric properties of Ln3NbO7 (Ln = Nd, Gd, Dy, Er, Yb and Y). J. Eur. Ceram. Soc. 27, 3971 (2007).CrossRefGoogle Scholar
Wakeshima, M. and Hinatsu, Y.: Magnetic properties and structural transitions of orthorhombic fluorite-related compounds Ln3MO7 (Ln = rare earths, M = transition metals). J. Solid State Chem. 183, 2681 (2010).CrossRefGoogle Scholar
Siqueira, K.P.F., Soares, J.C., Granado, E., Bittar, E.M., Paula, A.M., Moreira, R.L., and Dias, A.: Synchrotron X-ray diffraction and Raman spectroscopy of Ln3NbO7 (Ln = La, Pr, Nd, Sm-Lu) ceramics obtained by molten-salt synthesis. J. Solid State Chem. 209, 6368 (2014).CrossRefGoogle Scholar
Wan, C.L., Qu, Z.X., He, Y., Luan, D., and Pan, W.: Ultralow thermal conductivity in highly anion-defective aluminates. Phys. Rev. Lett. 101, 085901 (2008).CrossRefGoogle ScholarPubMed
Wan, C.L., Pan, W., Xu, Q., Qin, Y.X., Wang, J.D., Qu, Z.X., and Fang, M.H.: Effect of point defects on the thermal transport properties of (LaxGd1-x)2Zr2O7: Experiment and theoretical model. Phys. Rev. B 74, 144109 (2006).CrossRefGoogle Scholar
Zhao, M., Pan, W., Wan, C.L., Qu, Z.X., Li, Z., and Yan, J.: Defect engineering in development of low thermal conductivity materials: A review. J. Eur. Ceram. Soc. 37, 1 (2017).CrossRefGoogle Scholar
Chen, L., Wu, P., Song, P., and Feng, J.: Potential thermal barrier coating materials: RE3NbO7 (RE = La, Nd, Sm, Eu, Gd, Dy) ceramics. J. Am. Ceram. Soc. 101, 4503 (2018).CrossRefGoogle Scholar
Schlichting, K.W., Padture, N.P., and Klemens, P.G.: Thermal conductivity of dense and porous yttria-stabilized zirconia. J. Mater. Sci. 36, 3003 (2001).CrossRefGoogle Scholar
Wakeshima, M., Nishimine, H., and Hinatsu, Y.: Crystal structure and magnetic properties of rare earth tantalates RE3TaO7 (RE = rare earths). J. Phys. Condens. Matter. 16, 4103 (2004).CrossRefGoogle Scholar
Chen, L. and Feng, J.: Research progress of thermo-mechanical properties of rare earth tantalates RE3TaO7 and RETa3O9 ceramics. Mater. China 12, 398 (2017).Google Scholar
Limarga, A.M., Shian, S., Leckie, R.M., Levi, C.G., and Clarke, D.R.: Thermal conductivity of single- and multi-phase compositions in the ZrO2-Y2O3-Ta2O5 system. J. Eur. Ceram. Soc. 34, 3085 (2014).CrossRefGoogle Scholar
Chen, L., Song, P., and Feng, J.: Influence of ZrO2 alloying effect on the thermophysical properties of fluorite-type Eu3TaO7 ceramics. Scr. Mater. 152, 117 (2018).CrossRefGoogle Scholar
Chen, L., Wu, P., and Feng, J.: Optimization thermophysical properties of TiO2 alloying Sm3TaO7 ceramics as promising thermal barrier coatings. Int. J. Appl. Ceram. Technol. 16, 230 (2019).CrossRefGoogle Scholar
Zhang, H., Yu, H.P., Chen, X.G., Zhao, Y.D., Jiao, H.B., Li, G., and Li, Z.J.: Preparation and thermophysical properties of Sm2YbTaO7 and Sm2YTaO7. Ceram. Int. 13, 14695 (2016).Google Scholar
Yu, J.H., Zhao, H.Y., and Zhou, X.M.: Microstructure and properties of air plasma sprayed Sm2Zr2O7 coatings. J. Inorg. Mater. 7, 696 (2011).CrossRefGoogle Scholar
Zhou, Y., Gan, G.Y., Ge, Z.H., and Feng, J.: Thermophysical properties of SmTaO4, Sm3TaO7 and SmTa3O9 ceramics. Mater. Res. Express. 7, 015204 (2020).CrossRefGoogle Scholar
Francis, T.L., Rao, P.P., Mahesh, S.K., Sreena, T.S., and Babu, S.P.: Effect of host structure on the photoluminescence properties of Ln3TaO7: Eu3+ red phosphors. Opt. Mater. 52, 134 (2016).CrossRefGoogle Scholar
Heremans, C., Wuensch, B.J., Stalick, J.K., and Prince, E.: Fast-ion conducting Y2(ZryTi1-y)2O7 pyrochlores: Neutron Rietveld analysis of disorder induced by Zr substitution. J. Solid State Chem. 117, 108 (1995).CrossRefGoogle Scholar
Qu, Z.X., Wan, C.H., and Pan, W.: Thermal expansion and defect chemistry of MgO-doped Sm2Zr2O7. Chem. Mater. 19, 4913 (2007).CrossRefGoogle Scholar
Rohrer, G.S.: Structure Bonding in Crystalline Materials (Cambridge University Press, New York, 2001).CrossRefGoogle Scholar
Zhao, M., Ren, X.R., Yan, J., and Pan, W.: Thermo-mechanical properties of ThO2-doped Y2O3 stabilized ZrO2 for thermal barrier coatings. Ceram. Int. 42, 501 (2016).CrossRefGoogle Scholar
Wilde, P.J. and Catlow, C.R.A.: Defects and diffusion in pyrochlore structured oxides. Solid State Ion. 112, 173 (1998).CrossRefGoogle Scholar
Pirzada, M., Grimes, R.W., and Maguire, J.F.: Incorporation of divalent ions in A2B2O7 pyrochlores. Solid State Ion. 161, 81 (2003).CrossRefGoogle Scholar
Feng, J., Xiao, B., Zhou, R., and Pan, W.: Thermal expansion and conductivity of RE2Sn2O7 (RE = La, Nd, Sm, Gd, Er and Yb) pyrochlores. Scr. Mater. 69, 401 (2013).CrossRefGoogle Scholar
Yang, J., Han, Y., Shahid, M., Pan, W., Zhao, M., Wu, W., and Wan, C.L.: A promising material for thermal barrier coating: pyrochlore-related compound Sm2FeTaO7. Scr. Mater. 149, 49 (2018).CrossRefGoogle Scholar
Pitek, F.M. and Levi, C.G.: Opportunities for TBCs in ZrO2-YO1.5-TaO2.5 system. Surf. Coat. Technol. 201, 6044 (2007).CrossRefGoogle Scholar