Journal Home > Volume 9 , Issue 5
Journal of Advanced Ceramics 2020, 9(5): 595-605 https://doi.org/10.1007/s40145-020-0399-0
Research Article | Open Access | Issue | Published: 10 October 2020

High-entropy (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 with good high temperature stability, low thermal conductivity, and anisotropic thermal expansivity

Show Author's Information Zifan ZHAOa,b,  Huimin XIANGa,  Heng CHENa,  Fu-Zhi DAIa,  Xiaohui WANGc,  Zhijian PENGb( ),  Yanchun ZHOUa( )
Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Keywords:
(Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9, high-entropy ceramics (HECs), environmental barrier coatings, phase stability, thermal properties
Cite this article:
ZHAO Z, XIANG H, CHEN H, et al. High-entropy (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 with good high temperature stability, low thermal conductivity, and anisotropic thermal expansivity. Journal of Advanced Ceramics, 2020, 9(5): 595-605. https://doi.org/10.1007/s40145-020-0399-0
Download citation
EndNote(RIS)
BibTeX

1267

Views

167

Downloads

Citations

92

Crossref

N/A

WoS

88

Scopus

22

CSCD

Abstract Full text About this article

The critical requirements for the environmental barrier coating (EBC) materials of silicon-based ceramic matrix composites (CMCs) include good tolerance to harsh environments, thermal expansion matches with the interlayer mullite, good high-temperature phase stability, and low thermal conductivity. Cuspidine-structured rare-earth aluminates RE4Al2O9 have been considered as candidates of EBCs for their superior mechanical and thermal properties, but the phase transition at high temperatures is a notable drawback of these materials. To suppress the phase transition and improve the phase stability, a novel cuspidine-structured rare-earth aluminate solid solution (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 was designed and successfully synthesized inspired by entropy stabilization effect of high-entropy ceramics (HECs). The as-synthesized HE (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 exhibits a close thermal expansion coefficient (6.96×10-6 K-1 at 300-1473 K) to that of mullite, good phase stability from 300 to 1473 K, and low thermal conductivity (1.50 W·m-1·K-1 at room temperature). In addition, strong anisotropic thermal expansion has been observed compared to Y4Al2O9 and Yb4Al2O9. The mechanism for low thermal conductivity is attributed to the lattice distortion and mass difference of the constituent atoms, and the anisotropic thermal expansion is due to the anisotropic chemical bonding enhanced by the large size rare-earth cations.


menu
Abstract
Full text
Outline
About this article

High-entropy (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 with good high temperature stability, low thermal conductivity, and anisotropic thermal expansivity

Show Author's information Zifan ZHAOa,b, Huimin XIANGa, Heng CHENa, Fu-Zhi DAIa, Xiaohui WANGc, Zhijian PENGb( ), Yanchun ZHOUa( )
Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Abstract

The critical requirements for the environmental barrier coating (EBC) materials of silicon-based ceramic matrix composites (CMCs) include good tolerance to harsh environments, thermal expansion matches with the interlayer mullite, good high-temperature phase stability, and low thermal conductivity. Cuspidine-structured rare-earth aluminates RE4Al2O9 have been considered as candidates of EBCs for their superior mechanical and thermal properties, but the phase transition at high temperatures is a notable drawback of these materials. To suppress the phase transition and improve the phase stability, a novel cuspidine-structured rare-earth aluminate solid solution (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 was designed and successfully synthesized inspired by entropy stabilization effect of high-entropy ceramics (HECs). The as-synthesized HE (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9 exhibits a close thermal expansion coefficient (6.96×10-6 K-1 at 300-1473 K) to that of mullite, good phase stability from 300 to 1473 K, and low thermal conductivity (1.50 W·m-1·K-1 at room temperature). In addition, strong anisotropic thermal expansion has been observed compared to Y4Al2O9 and Yb4Al2O9. The mechanism for low thermal conductivity is attributed to the lattice distortion and mass difference of the constituent atoms, and the anisotropic thermal expansion is due to the anisotropic chemical bonding enhanced by the large size rare-earth cations.

Keywords: (Nd0.2Sm0.2Eu0.2Y0.2Yb0.2)4Al2O9, high-entropy ceramics (HECs), environmental barrier coatings, phase stability, thermal properties

References(51)

[1]
H Klemm. Silicon nitride for high-temperature applications. J Am Ceram Soc 2010, 93: 1501-1522.
DOI Google Scholar
[2]
R Naslain, F Christin. SiC-matrix composite materials for advanced jet engines. MRS Bull 2003, 28: 654-658.
DOI Google Scholar
[3]
R Naslain. Design, preparation and properties of non-oxide CMCs for application in engines and nuclear reactors: An overview. Compos Sci Technol 2004, 64: 155-170.
DOI Google Scholar
[4]
PF Becher, CH Hsueh, P Angelini, et al. Toughening behavior in whisker-reinforced ceramic matrix composites. J Am Ceram Soc 1988, 71: 1050-1061.
DOI Google Scholar
[5]
N Igawa, T Taguchi, T Nozawa, et al. Fabrication of SiC fiber reinforced SiC composite by chemical vapor infiltration for excellent mechanical properties. J Phys Chem Solids 2005, 66: 551-554.
DOI Google Scholar
[6]
NS Jacobson. Corrosion of silicon-based ceramics in combustion environments. J Am Ceram Soc 1993, 76: 3-28.
DOI Google Scholar
[7]
JL Smialek, RC Robinson, EJ Opila, et al. SiC and Si3N4 recession due to SiO2 scale volatility under combustor conditions. Adv Compos Mater 1999, 8: 33-45.
DOI Google Scholar
[8]
H Klemm, C Taut, G Wötting. Long-term stability of nonoxide ceramics in an oxidative environment at 1500 ℃. J Eur Ceram Soc 2003, 23: 619-627.
DOI Google Scholar
[9]
PF Tortorelli, KL More. Effects of high water-vapor pressure on oxidation of silicon carbide at 1200 ℃. J Am Ceram Soc 2003, 86: 1249-1255.
DOI Google Scholar
[10]
KL More, PF Tortorelli, LR Walker, et al. High- temperature stability of SiC-based composites in high- water-vapor-pressure environments. J Am Ceram Soc 2003, 86: 1272-1281.
DOI Google Scholar
[11]
EJ Opila. Oxidation and volatilization of silica formers in water vapor. J Am Ceram Soc 2003, 86: 1238-1248.
DOI Google Scholar
[12]
KN Lee. Current status of environmental barrier coatings for Si-based ceramics. Surf Coat Technol 2000, 133-134: 1-7.
DOI Google Scholar
[13]
KN Lee, DS Fox, NP Bansal. Rare earth silicate environmental barrier coatings for SiC/SiC composites and Si3N4 ceramics. J Eur Ceram Soc 2005, 25: 1705-1715.
DOI Google Scholar
[14]
BT Richards, HNG Wadley. Plasma spray deposition of tri-layer environmental barrier coatings. J Eur Ceram Soc 2014, 34: 3069-3083.
DOI Google Scholar
[15]
KN Lee, RA Miller. Development and environmental durability of mullite and mullite/YSZ dual layer coatings for SiC and Si3N4 ceramics. Surf Coat Technol 1996, 86: 142-148.
DOI Google Scholar
[16]
HM Xiang, ZH Feng, ZP Li, et al. Crystal structure, mechanical and thermal properties of Yb4Al2O9: A combination of experimental and theoretical investigations. J Eur Ceram Soc 2017, 37: 2491-2499.
DOI Google Scholar
[17]
KN Lee, RA Miller, NS Jacobson. New generation of plasma-sprayed mullite coatings on silicon carbide. J Am Ceram Soc 1995, 78: 705-710.
DOI Google Scholar
[18]
YC Zhou, HM Xiang, XP Lu, et al. Theoretical prediction on mechanical and thermal properties of a promising thermal barrier material: Y4Al2O9. J Adv Ceram 2015, 4: 83-93.
DOI Google Scholar
[19]
YC Zhou, XP Lu, HM Xiang, et al. Preparation, mechanical, and thermal properties of a promising thermal barrier material: Y4Al2O9. J Adv Ceram 2015, 4: 94-102.
DOI Google Scholar
[20]
A Morán-Ruiz, K Vidal, A Larrañaga, et al. Characterization of Ln4Al2O9 (Ln = Y, Sm, Eu, Gd, Tb) rare-earth aluminates as novel high-temperature barrier materials. Ceram Int 2018, 44: 8761-8767.
DOI Google Scholar
[21]
KN Lee. Environmental barrier coatings for SiCf/SiC. In Ceramic Matrix Composites. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014: 430-451.
DOI
[22]
H Yamane, K Ogawara, M Omori, et al. Thermal expansion and athermal phase transition of Y4AI2O9 ceramics. J Am Ceram Soc 1995, 78: 1230-1232.
DOI Google Scholar
[23]
M Gervais, A Douy. Solid phase transformation and metlting of the compounds Ln4Al2O9 (Ln, Gd, Dy, Y). Mater Sci Eng: B 1996, 38: 118-121.
DOI Google Scholar
[24]
H Yamane, T Sakamoto, S Kubota, et al. Preparation and phase transition of Gd4(Al1-xGax)2O9 solid solutions. J Mater Sci 2001, 36: 307-311.
DOI Google Scholar
[25]
H Yamane, K Ogawara, M Omori, et al. Phase transition of rare-earth aluminates (RE4Al2O9) and rare-earth gallates (RE4Ga2O9). J Am Ceram Soc 1995, 78: 2385-2390.
DOI Google Scholar
[26]
CM Rost, E Sachet, T Borman, et al. Entropy-stabilized oxides. Nat Commun 2015, 6: 8485.
DOI Google Scholar
[27]
KP Chen, XT Pei, L Tang, et al. A five-component entropy-stabilized fluorite oxide. J Eur Ceram Soc 2018, 38: 4161-4164.
DOI Google Scholar
[28]
DB Miracle, ON Senkov. A critical review of high entropy alloys and related concepts. Acta Mater 2017, 122: 448-511.
DOI Google Scholar
[29]
XL Yan, L Constantin, YF Lu, et al. (Hf0.2Zr0.2Ta0.2Nb0.2Ti0.2)C high-entropy ceramics with low thermal conductivity. J Am Ceram Soc 2018, 101: 4486-4491.
DOI Google Scholar
[30]
ZF Zhao, HM Xiang, FZ Dai, et al. (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)2Zr2O7: A novel high-entropy ceramic with low thermal conductivity and sluggish grain growth rate. J Mater Sci Technol 2019, 35: 2647-2651.
Google Scholar
[31]
ZF Zhao, H Chen, HM Xiang, et al. (Y0.25Yb0.25Er0.25Lu0.25)2(Zr0.5Hf0.5)2O7: A defective fluorite structured high entropy ceramic with low thermal conductivity and close thermal expansion coefficient to Al2O3. J Mater Sci Technol 2020, 39: 167-172.
Google Scholar
[32]
ZF Zhao, H Chen, HM Xiang, et al. (La0.2Ce0.2Nd0.2Sm0.2Eu0.2)PO4: A high-entropy rare-earth phosphate monazite ceramic with low thermal conductivity and good compatibility with Al2O3. J Mater Sci Technol 2019, 35: 2892-2896.
Google Scholar
[33]
H Chen, B Zhao, ZF Zhao, et al. Achieving strong microwave absorption capability and wide absorption bandwidth through a combination of high entropy rare earth silicide carbides/rare earth oxides. J Mater Sci Technol 2020, 47: 216-222.
DOI Google Scholar
[34]
Y Dong, K Ren, YH Lu, et al. High-entropy environmental barrier coating for the ceramic matrix composites. J Eur Ceram Soc 2019, 39: 2574-2579.
DOI Google Scholar
[35]
ZF Zhao, HM Xiang, FZ Dai, et al. (TiZrHf)P2O7: An equimolar multicomponent or high entropy ceramic with good thermal stability and low thermal conductivity. J Mater Sci Technol 2019, 35: 2227-2231.
DOI Google Scholar
[36]
ZF Zhao, H Chen, HM Xiang, et al. High-entropy (Y0.2Nd0.2Sm0.2Eu0.2Er0.2)AlO3: A promising thermal/ environmental barrier material for oxide/oxide composites. J Mater Sci Technol 2020, 47: 45-51.
Google Scholar
[37]
J Leitner, P Voňka, D Sedmidubský, et al. Application of Neumann-Kopp rule for the estimation of heat capacity of mixed oxides. Thermochimica Acta 2010, 497: 7-13.
DOI Google Scholar
[38]
II Barin. Thermochemical Data of Pure Substances. 3rd edn. Germany: VCH Verlagsgesellschaft mbH, 1995.
DOI
[39]
WJ Parker, RJ Jenkins, CP Butler, et al. Flash method of determining thermal diffusivity, heat capacity, and thermal conductivity. J Appl Phys 1961, 32: 1679-1684.
DOI Google Scholar
[40]
X Zhan, Z Li, B Liu, et al. Theoretical prediction of elastic stiffness and minimum lattice thermal conductivity of Y3Al5O12, YAlO3 and Y4Al2O9. J Am Ceram Soc 2012, 95: 1429-1434.
DOI Google Scholar
[41]
H Schneider, RX Fischer, J Schreuer. Mullite: crystal structure and related properties. J Am Ceram Soc 2015, 98: 2948-2967.
DOI Google Scholar
[42]
ZQ Sun, YC Zhou, JY Wang, et al. Thermal properties and thermal shock resistance of γ-Y2Si2O7. J Am Ceram Soc 2008, 91: 2623-2629.
DOI Google Scholar
[43]
ZQ Sun, MS Li, YC Zhou. Thermal properties of single-phase Y2SiO5. J Eur Ceram Soc 2009, 29: 551-557.
DOI Google Scholar
[44]
MH Lu, HM Xiang, ZH Feng, et al. Mechanical and thermal properties of Yb2SiO5: A promising material for T/EBCs applications. J Am Ceram Soc 2016, 99: 1404-1411.
DOI Google Scholar
[45]
SB Wang, YR Lu, YX Chen. Synthesis of single-phase β-Yb2Si2O7 and properties of its sintered bulk. Int J Appl Ceram Technol 2015, 12: 1140-1147.
DOI Google Scholar
[46]
GA Slack. Nonmetallic crystals with high thermal conductivity. J Phys Chem Solids 1973, 34: 321-335.
DOI Google Scholar
[47]
GA Slack. The thermal conductivity of nonmetallic crystals. Phys Rev B Solid State 1979, 34: 1-71.
DOI Google Scholar
[48]
ES Toberer, A Zevalkink, GJ Snyder. Phonon engineering through crystal chemistry. J Mater Chem 2011, 21: 15843-15852.
DOI Google Scholar
[49]
JD Chung, AJH McGaughey, M Kaviany. Role of phonon dispersion in lattice thermal conductivity modeling. J Heat Transf 2004, 126: 376-380.
DOI Google Scholar
[50]
PG Klemens. The scattering of low-frequency lattice waves by static imperfections. Proc Phys Soc A 1955, 68: 1113-1128.
DOI Google Scholar
[51]
FZ Dai, B Wen, YJ Sun, et al. Theoretical prediction on thermal and mechanical properties of high entropy (Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2)C by deep learning potential. J Mater Sci Technol 2020, 43: 168-174.
DOI Google Scholar
Publication history
Copyright
Acknowledgements
Rights and permissions

Publication history

Received: 23 May 2020
Revised: 15 June 2020
Accepted: 18 June 2020
Published: 10 October 2020
Issue date: October 2020

Copyright

© The author(s) 2020

Acknowledgements

We acknowledge financial support from the National Natural Science Foundation of China (Grant Nos. 51672064 and 51972089).

Rights and permissions

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

To view a copy of this licence, visit http://creativecommons. org/licenses/by/4.0/.

Return