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For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al2O3-SiO2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa·m1/2 that was 4-5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO2 in matrix was found above 1200 ℃. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 ℃, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 ℃.


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Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Show Author's information Wei ZHANGa,bQingsong MAb( )Kuanhong ZENGbSonglin LIANGbWeiguo MAOa( )
School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan, China
Science and Technology on Advanced Ceramic Fibers & Composites Laboratory, National University of Defense Technology, Changsha 410073, China

Abstract

For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al2O3-SiO2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa·m1/2 that was 4-5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO2 in matrix was found above 1200 ℃. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 ℃, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 ℃.

Keywords: mechanical property, thermal stability, carbon fiber reinforced mullite composite, sol

References(34)

[1]
H Schneider, J Schreuer, B Hildmann. Structure and properties of mullite−A review. J Eur Ceram Soc 2008, 28: 329-344.
[2]
MA Abdulhameed, MHD Othman, HNAA Joda, et al. Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes. J Adv Ceram 2017, 6: 330-340.
[3]
P Kumar, M Nath, A Ghosh, et al. Thermo-mechanical properties of mullite-zirconia composites derived from reaction sintering of zircon and sillimanite beach sand: Effect of CaO. Trans Nonferrous Met Soc China 2016, 26: 2397-2403.
[4]
XH Xu, XB Lao, JF Wu, et al. Effect of MnO2 on properties of SiC-mullite composite ceramics for solar sensible thermal storage. J Wuhan Univ Technol-Mater Sci 2016, 31: 491-495.
[5]
JY Zhang, H Zhan, ZY Fu, et al. In-situ synthesis and sintering of mullite glass composites by SPS. J Adv Ceram 2014, 3: 165-170.
[6]
QS Ma, LH Cai. Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites. J Adv Ceram 2017, 6: 360-367.
[7]
Y Wang, HT Liu, HF Cheng, et al. Effective fugitive carbon coatings for the strength improvement of 3D NextelTM 440/aluminosilicate composites. Mater Lett 2014, 126: 236-239.
[8]
Y Wang, HF Cheng, J Wang. Effects of the single layer CVD SiC interphases on mechanical properties of mullite fiber-reinforced mullite matrix composites fabricated via a sol-gel process. Ceram Int 2014, 40: 4707-4715.
[9]
Y Wang, HF Cheng, HT Liu, et al. Effects of sintering temperature on mechanical properties of 3D mullite fiber (ALF FB3) reinforced mullite composites. Ceram Int 2013, 39: 9229-9235.
[10]
C Kaya, EG Butler, A Selcuk, et al. Mullite (Nextel™ 720) fibre-reinforced mullite matrix composites exhibiting favourable thermomechanical properties. J Eur Ceram Soc 2002, 22: 2333-2342.
[11]
MB Ruggles-Wrenn, T Kutsal. Effects of steam environment on creep behavior of NextelTM720/alumina−mullite ceramic composite at elevated temperature. Compos A−Appl Sci Manuf 2010, 41: 1807-1816.
[12]
FW Zok. Developments in oxide fiber composites. J Am Ceram Soc 2006, 89: 3309-3324.
[13]
Y Wang, HT Liu, HF Cheng, et al. Research progress on oxide/oxide ceramic matrix composites. J Inorg Mater 2014, 29: 673-680. (in Chinese)
[14]
J Wu, FR Jones, PF James. Continuous fibre reinforced mullite matrix composites by sol-gel processing: Part Ⅰ Fabrication and microstructures. J Mater Sci 1997, 32: 3361-3368.
[15]
J Wu, FR Jones, PF James. Continuous fibre reinforced mullite matrix composites by sol-gel processing: Part Ⅱ Properties and fracture behavior. J Mater Sci 1997, 32: 3629-3635.
[16]
RL Dong, Y Hirata, H Sueyoshi, et al. Polymer impregnation and pyrolysis (PIP) method for the preparation of laminated woven fabric/mullite matrix composites with pseudoductility. J Eur Ceram Soc 2004, 24: 53-64.
[17]
Y Xiang, Q Wang, F Cao, et al. Sol-gel process and high-temperature property of SiO2/ZrO2-SiO2 composites. Ceram Int 2017, 43: 854-859.
[18]
Q Wang, F Cao, Y Xiang, et al. Effects of ZrO2 coating on the strength improvement of 2.5D SiCf/SiO2 composites. Ceram Int 2017, 43: 884-889.
[19]
CY Fan, QS Ma, KH Zeng. Thermal stability and oxidation resistance of C/Al2O3 composites fabricated from a sol with high solid content. Ceram Int 2017, 43: 10983-10990.
[20]
BR Shan, QS Ma, KH Zeng. Fabrication of three-dimensional carbon fiber preform reinforced YAG composites from a sol with high solid content. Ceram Int 2018, 44: 4478-4482.
[21]
BR Shan, QS Ma, KH Zeng. Microstructure and mechanical properties of carbon fiber needled felt reinforced sol-derived YAG composite. J Alloys Compd 2019, 772: 381-387.
[22]
HT Liu, QS Ma, WD Liu. Mechanical and oxidation resistance properties of 3D carbon fiber-reinforced mullite matrix composites prepared by sol-gel process. Ceram Int 2014, 40: 7203-7212.
[23]
SL Liang, QS Ma, HT Liu, et al. Fabrication and mechanical properties of three-dimensional carbon fiber reinforced (Al2O3-SiO2) matrix composites. Rare Metal Mater Eng 2016, 45: 585-589. (in Chinese)
[24]
W Zhang, QS Ma, KW Dai, et al. Preparation of three-dimensional braided carbon fiber reinforced mullite composites from a sol with high solid content. Trans Nonferrous Met Soc China 2018, 28: 2248-2254.
[25]
W Zhang, QS Ma, KW Dai, et al. Fabrication and properties of three-dimensional braided carbon fiber reinforced SiO2-rich mullite composites. J Wuhan Univ TechnolMater Sci (accepted).
[26]
M Yan, W Song, ZH Chen. In situ growth of a carbon interphase between carbon fibres and a polycarbosilane-derived silicon carbide matrix. Carbon 2011, 49: 2869-2872.
[27]
HT Liu, LW Yang, X Sun, et al. Enhancing the fracture resistance of carbon fiber reinforced SiC matrix composites by interface modification through a simple fiber heat-treatment process. Carbon 2016, 109: 435-443.
[28]
YS Liu, LF Cheng, LT Zhang, et al. Fracture behavior and mechanism of 2D C/SiC-BCx composite at room temperature. Mater Sci Eng 2011, 528: 1436-1441.
[29]
LS Cividanes, TMB Campos, LA Rodrigues, et al. Review of mullite synthesis routes by sol-gel method. J Sol-Gel Sci Technol 2010, 55: 111-125.
[30]
J Wu, M Chen, FR Jones, et al. Characterisation of sol-gel derived alumina-silica matrices for continuous fibre reinforced composites. J Eur Ceram Soc 1996, 16: 619-626.
[31]
DR Treadwell, DM Dabbs, IA Aksay. Mullite (3Al2O3- 2SiO2) synthesis with aluminosiloxanes. Chem Mater 1996, 8: 2056-2060.
[32]
E Tkalcec, H Ivankovic, R Nass, et al. Crystallization kinetics of mullite formation in diphasic gels containing different alumina components. J Eur Ceram Soc 2003, 23: 1465-1475.
[33]
C Vix-Guterl, P Ehrburger. Effect of the properties of a carbon substrate on its reaction with silica for silicon carbide formation. Carbon 1997, 35: 1587-1592.
[34]
T Yang, JH Chen, LD Li, et al. Template free synthesis of highly ordered mullite nanowhiskers with exceptional photoluminescence. Ceram Int 2015, 41: 9560-9566.
Publication history
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Publication history

Received: 30 August 2018
Revised: 05 November 2018
Accepted: 21 November 2018
Published: 13 June 2019
Issue date: June 2019

Copyright

© The author(s) 2019

Acknowledgements

This work was supported by the Open Foundation of Science and Technology on Thermostructural Composite Materials Laboratory (Grant No. 614291102010117), the Science Innovation Foundation of Shanghai Academy of Spaceflight Technology (Grant No. SAST2015043), and the National Natural Science Foundation of China (Grant No. 11572277).

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