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Porous silicon nitride ceramics have attracted a considerable attention due to their excellent overall performance, but poor porosity homogeneity and structural shrinkage induced by prolonged high temperature sintering limit its further application. Herein, as a three-in-one solution for the above issues, for the first time we develop a novel approach that integrates the merits of gelcasting-SHS (self-propagating high-temperature synthesis) to prepare porous Si3N4 ceramics to simultaneously achieve high porosity, high strength, high toughness, and low thermal conductivity across a wide temperature range. By regulating the solid content, porous Si3N4 ceramics with homogeneous pore structure are obtained, where the pore size falls inbetween 1.61 and 4.41 μm, and the elongated grains are interlaced and interlocked to form micron-sized coherent interconnected pores. At the same time, porous Si3N4 ceramics with porosity of 67.83% to 78.03% are obtained, where the compressive strength reaches 11.79 to 47.75 MPa and fracture toughness reaches 1.20 to 6.71 MPa·m1/2.


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Microstructure and properties of porous Si3N4 ceramics by gelcasting-self-propagating high-temperature synthesis (SHS)

Show Author's information Shile CHEN1Liang WANG2Gang HE2Jiangtao LI2( )Chang-An WANG1( )
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Abstract

Porous silicon nitride ceramics have attracted a considerable attention due to their excellent overall performance, but poor porosity homogeneity and structural shrinkage induced by prolonged high temperature sintering limit its further application. Herein, as a three-in-one solution for the above issues, for the first time we develop a novel approach that integrates the merits of gelcasting-SHS (self-propagating high-temperature synthesis) to prepare porous Si3N4 ceramics to simultaneously achieve high porosity, high strength, high toughness, and low thermal conductivity across a wide temperature range. By regulating the solid content, porous Si3N4 ceramics with homogeneous pore structure are obtained, where the pore size falls inbetween 1.61 and 4.41 μm, and the elongated grains are interlaced and interlocked to form micron-sized coherent interconnected pores. At the same time, porous Si3N4 ceramics with porosity of 67.83% to 78.03% are obtained, where the compressive strength reaches 11.79 to 47.75 MPa and fracture toughness reaches 1.20 to 6.71 MPa·m1/2.

Keywords:

porous Si3N4 ceramics, gelcasting, self-propagating high-temperature synthesis (SHS), porosity
Received: 13 May 2021 Revised: 30 July 2021 Accepted: 03 August 2021 Published: 06 November 2021 Issue date: January 2022
References(46)
[1]
Knickerbocker SH, Zangvil A, Brown SD. High-temperature mechanical properties and microstructures for hot-pressed silicon nitrides with amorphous and crystalline intergranular phases. J Am Ceram Soc 1985, 68: C99-C101.
[2]
Cinibulk MK, Thomas G, Johnson SM. Strength and creep behavior of rare-earth disilicate-silicon nitride ceramics. J Am Ceram Soc 1992, 75: 2050-2055.
[3]
Guo SQ, Hirosaki N, Nishimura T, et al. Hot-pressed silicon nitride with Lu2O3 additives: Oxidation and its effect on strength. J Am Ceram Soc 2003, 86: 1900-1905.
[4]
Yu J, Yang J, Li S, et al. Preparation of Si3N4 foam ceramics with nest-like cell structure by particle-stabilized foams. J Am Ceram Soc 2012, 95: 1229-1233.
[5]
Kalemtas A, Topates G, Özcoban H, et al. Mechanical characterization of highly porous β-Si3N4 ceramics fabricated via partial sintering & starch addition. J Eur Ceram Soc 2013, 33: 1507-1515.
[6]
Xia Y, Zeng YP, Jiang D. Mechanical and dielectric properties of porous Si3N4 ceramics using PMMA as pore former. Ceram Int 2011, 37: 3775-3779.
[7]
Cheng ZL, Ye F, Liu YS, et al. Mechanical and dielectric properties of porous and wave-transparent Si3N4-Si3N4 composite ceramics fabricated by 3D printing combined with chemical vapor infiltration. J Adv Ceram 2019, 8: 399-407.
[8]
Yin S, Pan LM, Huang K, et al. Porous Si3N4 ceramics with hierarchical pore structures prepared by gelcasting using DMAA as gelling agent and PS as pore-forming agent. J Alloys Compd 2019, 805: 69-77.
[9]
Hu YD, Zuo KH, Xia YF, et al. Microstructure and permeability of porous Si3N4 supports prepared via SHS. Ceram Int 2021, 47: 1571-1577.
[10]
Li XQ, Yao DX, Zuo KH, et al. Microstructure and gas permeation performance of porous silicon nitride ceramics with unidirectionally aligned channels. J Am Ceram Soc 2020, 103: 6565-6574.
[11]
Li L, Li QG, Hong J, et al. Effect of Si3N4 solid contents on mechanical and dielectric properties of porous Si3N4 ceramics through freeze-drying. J Alloys Compd 2018, 732: 136-140.
[12]
Yao D, Xia Y, Zeng YP, et al. Fabrication porous Si3N4 ceramics via starch consolidation-freeze drying process. Mater Lett 2012, 68: 75-77.
[13]
Parsi A, Golestani-Fard F, Mirkazemi SM. The effect of gelcasting parameters on microstructural optimization of porous Si3N4 ceramics. Ceram Int 2019, 45: 9719-9725.
[14]
Wu JM, Zhang XY, Yang JL. Novel porous Si3N4 ceramics prepared by aqueous gelcasting using Si3N4 poly-hollow microspheres as pore-forming agent. J Eur Ceram Soc 2014, 34: 1089-1096.
[15]
Zhang Y, Yao D, Zuo K, et al. Fabrication and mechanical properties of porous Si3N4 ceramics prepared via SHS. Ceram Int 2019, 45: 14867-14872.
[16]
Wang L, He G, Yang ZC, et al. Combustion synthesis of high flexural strength, low linear shrinkage and machinable porous β-Si3N4 ceramics. J Eur Ceram Soc 2021, 41: 2395-2399.
[17]
Zhang Y, Yao DX, Zuo KH, et al. Effects of N2 pressure and Si particle size on mechanical properties of porous Si3N4 ceramics prepared via SHS. J Eur Ceram Soc 2020, 40: 4454-4461.
[18]
Zhang Y, Yu X, Gu H, et al. Microstructure evolution and high-temperature mechanical properties of porous Si3N4 ceramics prepared by SHS with a small amount of Y2O3 addition. Ceram Int 2021, 47: 5656-5662.
[19]
Su L, Li M, Wang H, et al. Resilient Si3N4 nanobelt aerogel as fire-resistant and electromagnetic wave-transparent thermal insulator. ACS Appl Mater Interfaces 2019, 11: 15795-15803.
[20]
Zhang X, Yuan J, Ding Y, et al. Directly growing nanowire- assembled nanofibrous ceramic foams with multi-lamellar structure via freeze-casting process. J Eur Ceram Soc 2021, 41: 1041-1047.
[21]
Chen R, Huang Y, Wang CA, et al. Ceramics with ultra-low density fabricated by gel casting: An unconventional view. J Am Ceram Soc 2007, 90: 3424-3429.
[22]
Hu LF, Wang CG, Huang Y. Porous yttria-stabilized zirconia ceramics with ultra-low thermal conductivity. J Mater Sci 2010, 45: 3242-3246.
[23]
Hu LF, Wang CG. Effect of sintering temperature on compressive strength of porous yttria-stabilized zirconia ceramics. Ceram Int 2010, 36: 1697-1701.
[24]
Chen D, Zhang B, Zhuang HR, et al. Combustion synthesis of network silicon nitride porous ceramics. Ceram Int 2003, 29: 363-364.
[25]
Cano IG, Rodríguez MA. Synthesis and sintering of Si3N4 obtained by the SHS process. Ind Eng Chem Res 2006, 45: 1277-1280.
[26]
Yao D, Xia Y, Zuo KH, et al. Porous Si3N4 ceramics prepared via partial nitridation and SHS. J Eur Ceram Soc 2013, 33: 371-374.
[27]
Chen Y, Zhang C, Wang N, et al. Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique. Ceram Int 2019, 45: 20040-20045.
[28]
Gao P, Xu J, Piao Y, et al. Deposition of silicon carbon nitride thin films by microwave ECR plasma enhanced unbalance magnetron sputtering. Surf Coat Technol 2007, 201: 5298-5301.
[29]
Han L, Wang JK, Li FL, et al. Low-temperature preparation of Si3N4 whiskers bonded/reinforced SiC porous ceramics via foam-gelcasting combined with catalytic nitridation. J Eur Ceram Soc 2018, 38: 1210-1218.
[30]
Li S, Wang CG, Yang F, et al. Hollow-grained “Voronoi foam” ceramics with high strength and thermal superinsulation up to 1400 ℃. Mater Today 2021, 46: 35-43.
[31]
Bergström L. Rheological properties of concentrated, nonaqueous silicon nitride suspensions. J Am Ceram Soc 1996, 79: 3033-3040.
[32]
Coble RL, Kingery WD. Effect of porosity on physical properties of sintered alumina. J Am Ceram Soc 2006, 39: 377-385.
[33]
Sun Y, Zhao Z, Li X, et al. A novel aerogels/porous Si3N4 ceramics composite with high strength and improved thermal insulation property. Ceram Int 2018, 44: 5233-5237.
[34]
Liu TT, Jiang C, Guo W. Effect of CeO2 on low temperature pressureless sintering of porous Si3N4 ceramics. J Rare Earths 2017, 35: 172-176.
[35]
Li X, Zhang L, Yin X. Microstructure and mechanical properties of three porous Si3N4 ceramics fabricated by different techniques. Mater Sci Eng: A 2012, 549: 43-49.
[36]
Wang F, Gu H, Yin JW, et al. Porous Si3N4 ceramics fabricated through a modified incomplete gelcasting and freeze-drying method. Ceram Int 2017, 43: 14678-14682.
[37]
Hu HL, Zeng YP, Xia YF, et al. High-strength porous Si3N4 ceramics prepared by freeze casting and silicon powder nitridation process. Mater Lett 2014, 133: 285-288.
[38]
Xia Y, Zeng YP, Jiang D. Microstructure and mechanical properties of porous Si3N4 ceramics prepared by freeze-casting. Mater Des 2012, 33: 98-103.
[39]
Hu S, Li A, Feng B, et al. A non-sintering fabrication method for porous Si3N4 ceramics via sol hydrothermal process. Ceram Int 2018, 44: 19699-19705.
[40]
Xia Y, Zeng YP, Jiang D. Dielectric and mechanical properties of porous Si3N4 ceramics prepared via low temperature sintering. Ceram Int 2009, 35: 1699-1703.
[41]
Li X, Zhang L, Yin X. Fabrication and properties of porous Si3N4 ceramic with high porosity. J Mater Sci Technol 2012, 28: 1151-1156.
[42]
Yue J, Dong B, Wang H. Porous Si3N4 fabricated by phase separation method using benzoic acid as pore-forming agent. J Am Ceram Soc 2011, 94: 1989-1991.
[43]
Li X, Yin X, Zhang L, et al. Mechanical and dielectric properties of porous Si3N4-SiO2 composite ceramics. Mater Sci Eng: A 2009, 500: 63-69.
[44]
Yang J, Yang JF, Shan SY, et al. Effect of sintering additives on microstructure and mechanical properties of porous silicon nitride ceramics. J Am Ceram Soc 2006, 89: 3843-3845.
[45]
Yin S, Pan LM, Fang X, et al. Porous Si3N4 ceramics prepared by aqueous gelcasting using low-toxicity DMAA system: Regulatable microstructure and properties by monomer content. Ceram Int 2019, 45: 9994-10003.
[46]
Li B, Jiang P, Yan MW, et al. Characterization and properties of rapid fabrication of network porous Si3N4 ceramics. J Alloys Compd 2017, 709: 717-723.
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Publication history

Received: 13 May 2021
Revised: 30 July 2021
Accepted: 03 August 2021
Published: 06 November 2021
Issue date: January 2022

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© The Author(s) 2021.

Acknowledgements

The authors would like to thank the financial supports from the National Natural Science Foundation of China (NSFC, Nos. 51872159 and 52072381).

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