Microstructures and Mechanical Properties of Three-Dimensional Braided Carbon Fiber Reinforced Mullite Composites with Different Sols as Raw Materials

Abstract:

In order to efficiently fabricate dense three-dimensional carbon fiber reinforced mullite matrix composites (3D C/mullite), two kinds of Al₂O₃-SiO₂ sols with high solid content were used as raw materials. The ceramic yield and mullitization behavior of the sols and the densification process were investigated. It is indicated that the two sols have proper solid content and ceramic yield and can be completely transformed into mullite at 1573K, which make them be able to prepare composites. 3D C/mullite composites with a porosity of ∼25% were prepared by repeating less than 20 cycles of infiltration-drying-heating of sols, and the microstructures and mechanical properties were examined. The results suggest that the sol with smaller particle size derived composites exhibit well-sintered dense matrix and physically stronger interfacial bonding, which are beneficial to improve load-bearing and load-transferring capacity of matrix. As a result, this composites show much higher mechanical properties. The flexural strength and modulus are 2.4 times and 1.3 times as those of the sol with larger particle size derived composites, respectively.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 27-32
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.27
• Online since: April 2015
• Authors: Song Lin Liang, Qing Song Ma*, Hai Tao Liu
• Keywords: Mechanical Properties, Mullite Matrix Composites, Sol-Gel, Three-Dimensional Carbon Fiber

References

[1] U. Steinhauser, W. Braue, J. Goè, et al., A new concept for thermal protection of all-mullite composites in combustion chambers, Journal of the European Ceramic Society 20 (5) (2000) 651-658.

DOI: 10.1016/s0955-2219(99)00265-4

[2] K.N. Lee, D.S. Fox, J.I. Eldridge, et al., Upper temperature limit of environmental barrier coatings based on mullite and BSAS, Journal of American Ceramic Society 86 (8) (2003) 1299-1306.

DOI: 10.1111/j.1151-2916.2003.tb03466.x

[3] H. Schneider, S. Komarneni. Mullite, WILEY-VCH verlag GmbH & Co. KGaA, Weinheim 72 (9) (2005) 397-402.

[4] L.M. Tai, Mechanical properties of mullite, Journal of the American Ceramic Society 66 (10) (1983) 699-704.

[5] A.I. Aksay, M.D. Dabbs, M. Sarikaya, Mullite for structural, electronic and optical application, Journal of the American Ceramic Society 74 (10) (1991) 2343-2358.

DOI: 10.1111/j.1151-2916.1991.tb06768.x

[6] R. Naslain, Design, preparation and properties of non-oxide CMCs for application in engines and nuclear reactors: an overview, Composites Science and Technology 64 (2) (2004) 155-170.

DOI: 10.1016/s0266-3538(03)00230-6

[7] M. Parlier, M.H. Ritti, State of the art and perspectives for oxide/oxide composites, Aerospace Science and Technology 7 (3) (2003) 211-221.

DOI: 10.1016/s1270-9638(02)00015-9

[8] F.W. Zok, Developments in oxide fiber composites, Journal of the American Ceramic Society 89 (11) (2006) 3309-3324.

DOI: 10.1111/j.1551-2916.2006.01342.x

[9] H.T. Liu, H.F. Cheng, J. Wang, et al., Effects of the single layer CVD SiC interphases on the mechanical properties of the SiCf/SiC composites fabricated by PIP process, Ceramics International 36 (7) (2010) 2033-(2037).

DOI: 10.1016/j.ceramint.2010.05.014

[10] T. Tanaka, N. Tamari, L. Kondo, et al., Fabrication of three-dimensional Tyranno fiber reinforced SiC composite by the polymer precursor method, Ceramics International 24 (4) (1998) 365-370.

DOI: 10.1016/s0272-8842(97)00023-0

[11] K.J. Lee, Y.T. Yeh, H.Z. Cheng, et al., Tribological behavior of carbon nanotube/aluminosilicate composites prepared through TEOS/boehmite catalyst sol-gel and CVD process, Journal of Alloys and Compounds 504S (2010) S356-S360.

DOI: 10.1016/j.jallcom.2010.02.048

[12] D. Amutharani, F.D. Gnanam, Low temperature pressureless sintering of sol-gel derived mullite, Materials Science and Engineering A264 (1999) 254-261.

DOI: 10.1016/s0921-5093(98)01094-6

[13] H.T. Liu, Q.S. Ma, W.D. Liu, Mechanical and oxidation resistance properties of 3D carbon fiber-reinforced mullite matrix composites prepared by sol-gel process, Ceramics International 40 (5) (2014) 7203-7212.

DOI: 10.1016/j.ceramint.2013.12.059

[14] Y. Wang, H.F. Cheng, H.T. Liu, et al., Effects of sintering temperature on mechanical properties of 3D mullite fiber (ALF FB3) reinforced mullite composites, Ceramics International 39 (8) (2013) 9229-9235.

DOI: 10.1016/j.ceramint.2013.05.030

[15] X.G. Zhou, Y. You, C.R. Zhang, et al., Effect of carbon fiber pre-heat-treatment on the microstructure and properties of Cf/SiC composites, Material Science and Engineering A433 (6) (2006) 104-107.