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Influence of Al2O3 content on mechanical properties of silica-based ceramic cores prepared by stereolithography


Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical properties. In this study, silica-based ceramics were prepared with Al2O3 addition by stereolithography, and the influence of Al2O3 content on mechanical properties of the silica-based ceramics was investigated. The Al2O3 in silica-based ceramics can improve the mechanical properties by playing a role as a seed for the crystallization of fused silica into cristobalite. As a result, with the increase of Al2O3 content, the linear shrinkage of the silica-based ceramics first decreased and then increased, while the room-temperature flexural strength and the high-temperature flexural strength first increased and then decreased. As the Al2O3 content increased to 1.0 vol%, the linear shrinkage was reduced to 1.64% because of the blocked viscous flow caused by Al2O3. Meanwhile, the room-temperature flexural strength and the high-temperature flexural strength were improved to 20.38 and 21.43 MPa with 1.0 vol% Al2O3, respectively, due to the increased α-cristobalite and β-cristobalite content. Therefore, using the optimal content of Al2O3 in silica-based ceramics can provide excellent mechanical properties, which are suitable for the application of ceramic cores in the manufacturing of hollow blades.


  1. [1]

    Zhong JW, Xu QY. High-temperature mechanical behaviors of SiO2-based ceramic core for directional solidification of turbine blades. Materials 2020, 13: 4579.

    CAS  Google Scholar 

  2. [2]

    Bae CJ, Kim D, Halloran JW. Mechanical and kinetic studies on the refractory fused silica of integrally cored ceramic mold fabricated by additive manufacturing. J Eur Ceram Soc 2019, 39: 618–623.

    CAS  Google Scholar 

  3. [3]

    Huseby IC, Borom MP, Greskovich CD. High temperature characterization of silica-base cores for superalloys. Am Ceram Soc Bull 1979, 58: 448–452.

    CAS  Google Scholar 

  4. [4]

    Kim YH, Yeo JG, Lee JS, et al. Influence of silicon carbide as a mineralizer on mechanical and thermal properties of silica-based ceramic cores. Ceram Int 2016, 42: 14738–14742.

    CAS  Google Scholar 

  5. [5]

    Kim YH, Yeo JG, Choi SC. Shrinkage and flexural strength improvement of silica-based composites for ceramic cores by colloidal alumina infiltration. Ceram Int 2016, 42: 8878–8883.

    CAS  Google Scholar 

  6. [6]

    Chen X, Zheng WL, Zhang J, et al. Enhanced thermal properties of silica-based ceramic cores prepared by coating alumina/mullite on the surface of fused silica powders. Ceram Int 2020, 46: 11819–11827.

    CAS  Google Scholar 

  7. [7]

    He X, Ding YC, Lei ZP, et al. 3D printing of continuous fiber-reinforced thermoset composites. Addit Manuf 2021, 40: 101921.

    CAS  Google Scholar 

  8. [8]

    Chen ZW, Li ZY, Li JJ, et al. 3D printing of ceramics: A review. J Eur Ceram Soc 2019, 39: 661–687.

    CAS  Google Scholar 

  9. [9]

    Chen Z, Sun XH, Shang YP, et al. Dense ceramics with complex shape fabricated by 3D printing: A review. J Adv Ceram 2021, 10: 195–218.

    CAS  Google Scholar 

  10. [10]

    Li H, Liu YS, Liu YS, et al. Effect of sintering temperature in argon atmosphere on microstructure and properties of 3D printed alumina ceramic cores. J Adv Ceram 2020, 9: 220–231.

    CAS  Google Scholar 

  11. [11]

    Liu SS, Li M, Wu JM, et al. Preparation of high-porosity Al2O3 ceramic foams via selective laser sintering of Al2O3 poly-hollow microspheres. Ceram Int 2020, 46: 4240–4247.

    CAS  Google Scholar 

  12. [12]

    Yao YX, Qin W, Xing BH, et al. High performance hydroxyapatite ceramics and a triply periodic minimum surface structure fabricated by digital light processing 3D printing. J Adv Ceram 2021, 10: 39–48.

    CAS  Google Scholar 

  13. [13]

    Feng CW, Zhang KQ, He RJ, et al. Additive manufacturing of hydroxyapatite bioceramic scaffolds: Dispersion, digital light processing, sintering, mechanical properties, and biocompatibility. J Adv Ceram 2020, 9: 360–373.

    CAS  Google Scholar 

  14. [14]

    Ding GJ, He RJ, Zhang KQ, et al. Stereolithography 3D printing of SiC ceramic with potential for lightweight optical mirror. Ceram Int 2020, 46: 18785–18790.

    CAS  Google Scholar 

  15. [15]

    Grigoryan B, Sazer DW, Avila A, et al. Development, characterization, and applications of multi-material stereolithography bioprinting. Sci Rep 2021, 11: 3171.

    CAS  Google Scholar 

  16. [16]

    Chen F, Zhu H, Wu JM, et al. Preparation and biological evaluation of ZrO2 all-ceramic teeth by DLP technology. Ceram Int 2020, 46: 11268–11274.

    CAS  Google Scholar 

  17. [17]

    Kozlov DA, Tikhonova SA, Evdokimov PV, et al. Stereolithography 3D printing from suspensions containing titanium dioxide. Russ J Inorg Chem 2020, 65: 1958–1964.

    CAS  Google Scholar 

  18. [18]

    Li H, Hu KH, Liu YS, et al. Improved mechanical properties of silica ceramic cores prepared by 3D printing and sintering processes. Scripta Mater 2021, 194: 113665.

    CAS  Google Scholar 

  19. [19]

    Kotz F, Arnold K, Bauer W, et al. Three-dimensional printing of transparent fused silica glass. Nature 2017, 544: 337–339.

    CAS  Google Scholar 

  20. [20]

    Cai P, Guo L, Wang H, et al. Effects of slurry mixing methods and solid loading on 3D printed silica glass parts based on DLP stereolithography. Ceram Int 2020, 46: 16833–16841.

    CAS  Google Scholar 

  21. [21]

    Liu C, Qian B, Liu XF, et al. Additive manufacturing of silica glass using laser stereolithography with a top-down approach and fast debinding. RSC Adv 2018, 8: 16344–16348.

    CAS  Google Scholar 

  22. [22]

    Ji SH, Kim DS, Park MS, et al. Sintering process optimization for 3YSZ ceramic 3D-printed objects manufactured by stereolithography. Nanomaterials 2021, 11: 192.

    CAS  Google Scholar 

  23. [23]

    Mukhtarkhanov M, Perveen A, Talamona D. Application of stereolithography based 3D printing technology in investment casting. Micromachines 2020, 11: 946.

    Google Scholar 

  24. [24]

    Manière C, Kerbart G, Harnois C, et al. Modeling sintering anisotropy in ceramic stereolithography of silica. Acta Mater 2020, 182: 163–171.

    Google Scholar 

  25. [25]

    Liu J, Wang QH, Li YW, et al. Inhibiting crystallization of fused silica ceramic at high temperature with addition of α-Si3N4. Ceram Int 2021, 47: 11394–11404.

    CAS  Google Scholar 

  26. [26]

    Wang YY, Li L, Wang ZY, et al. Fabrication of dense silica ceramics through a stereo lithography-based additive manufacturing. Solid State Phenom 2018, 281: 456–462.

    Google Scholar 

  27. [27]

    Niu SX, Xu XQ, Li X, et al. Enhanced properties of silica-based ceramic cores by controlled particle sizes of cristobalite seeds. Adv Appl Ceram 2019, 118: 403–408.

    CAS  Google Scholar 

  28. [28]

    Wang JC. A novel fabrication method of high strength alumina ceramic parts based on solvent-based slurry stereolithography and sintering. Int J Precis Eng Manuf 2013, 14: 485–491.

    CAS  Google Scholar 

  29. [29]

    An GS, Choi SW, Kim YH, et al. Effective infiltration with polyethyleneimine-grafted colloidal alumina particles for silica-based ceramic cores. J Ceram Soc Jpn 2017, 125: 95–99.

    CAS  Google Scholar 

  30. [30]

    Goswami A, Ankit K, Balashanmugam N, et al. Optimization of rheological properties of photopolymerizable alumina suspensions for ceramic microstereolithography. Ceram Int 2014, 40: 3655–3665.

    CAS  Google Scholar 

  31. [31]

    Zhang S, Sha N, Zhao Z. Surface modification of α-Al2O3 with dicarboxylic acids for the preparation of UV-curable ceramic suspensions. J Eur Ceram Soc 2017, 37: 1607–1616.

    CAS  Google Scholar 

  32. [32]

    Chen X, Liu CY, Zheng WL, et al. High strength silica-based ceramics material for investment casting applications: Effects of adding nanosized alumina coatings. Ceram Int 2020, 46: 196–203.

    CAS  Google Scholar 

  33. [33]

    Kazemi A, Faghihi-Sani MA, Alizadeh HR. Investigation on cristobalite crystallization in silica-based ceramic cores for investment casting. J Eur Ceram Soc 2013, 33: 3397–3402.

    CAS  Google Scholar 

  34. [34]

    Huang LP, Duffrène L, Kieffer J. Structural transitions in silica glass: Thermo-mechanical anomalies and polyamorphism. J Non-Cryst Solids 2004, 349: 1–9.

    CAS  Google Scholar 

  35. [35]

    Sacks MD, Bozkurt N, Scheiffele GW. Fabrication of mullite and mullite-matrix composites by transient viscous sintering of composite powders. J Am Ceram Soc 1991, 74: 2428–2437.

    CAS  Google Scholar 

  36. [36]

    Duan WJ, Yang ZH, Cai DL, et al. Effect of sintering temperature on microstructure and mechanical properties of boron nitride whisker reinforced fused silica composites. Ceram Int 2020, 46: 5132–5140.

    CAS  Google Scholar 

  37. [37]

    Kazemi A, Faghihi-Sani MA, Nayyeri MJ, et al. Effect of zircon content on chemical and mechanical behavior of silica-based ceramic cores. Ceram Int 2014, 40: 1093–1098.

    CAS  Google Scholar 

  38. [38]

    Breneman RC, Halloran JW. Effect of cristobalite on the strength of sintered fused silica above and below the cristobalite transformation. J Am Ceram Soc 2015, 98: 1611–1617.

    CAS  Google Scholar 

  39. [39]

    Peacor DR. High-temperature single-crystal study of the cristobalite inversion. Zeitschrift Für Kristallographie 1973, 138: 274–298.

    CAS  Google Scholar 

  40. [40]

    Xia GB, He L, Yang DA. Preparation and characterization of CaO-Al2O3-SiO2 glass/fused silica composites for LTCC application. J Alloys Compd 2012, 531: 70–76.

    CAS  Google Scholar 

  41. [41]

    Yang ZG, Zhao ZJ, Yu JB, et al. Preparation of silica ceramic cores by the preceramic pyrolysis technology using silicone resin as precursor and binder. Mater Chem Phys 2019, 223: 676–682.

    CAS  Google Scholar 

  42. [42]

    Bae CJ. Integrally cored ceramic investment casting mold fabricated by ceramic stereolithography. Ph.D. Thesis. Ann Arbor, USA: University of Michigan, Ann Arbor, 2008.

    Google Scholar 

  43. [43]

    Beeley PR, Smart RF. Investment Casting. London, UK: Cambridge University Press, 1995.

    Google Scholar 

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The research work presented in this paper is supported by the National Science and Technology Major Project (2017-VII-0008-0102), the National Natural Science Foundation of China (51975230), and the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201903SIC). Meanwhile, the authors are grateful for the State Key Laboratory of Materials Processing and Die & Mould Technology for mechanical property tests, as well as the Analysis and Testing Center of Huazhong University of Science and Technology for XRD and SEM tests.

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Correspondence to Jia-Min Wu or Yu-Sheng Shi.

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Zheng, W., Wu, JM., Chen, S. et al. Influence of Al2O3 content on mechanical properties of silica-based ceramic cores prepared by stereolithography. J Adv Ceram 10, 1381–1388 (2021).

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  • silica
  • ceramic core
  • stereolithography
  • Al2O3
  • mechanical properties
  • hollow blades