Reaction Sintering of Carbon Fiber Reinforced Silicon Carbide Composite by Gel-Casting Method with Water Soluble Epoxy Resin as Gel Former

Abstract:

Reaction-bonding sintering silicon carbide (RB-SiC) toughened by 10vol% short carbon fibers were produced by Gel-casting method using water soluble epoxy as gel former and then reaction sintering at 1750°C under vacuum atmosphere for 2 h . SEM showed that short carbon fibers could disperse uniformly in the preforms and sintered carbon fiber reinforced silicon carbide composites (C_f/SiC). The mechanical test results showed that the strength decrease from 286 MPa for RB-SiC to 231 MPa for C_f/SiC, however, the fracture toughness of Cf/SiC increased from 3.65 MPa m^1/2 to 5.28 MPa m^1/2 compared with RB-SiC. The strength decrease of the C_f/SiC should be ascribed to the chemical reaction between the addition of short fibers and matrix, and the increase of the fracture toughness could be attributed to fiber debonding, fiber pull-out and crack deflection .

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 176-181
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.176
• Online since: September 2011
• Authors: Jing Wei, Jing Zhong Fang, Ai Fang Zhang
• Keywords: Carbon Fiber (CF), Gelcasting, Reaction Sintering, Silicon Carbide (SiC), Water Soluble Epoxy Resin

References

[1] R.H. Jones, L.L. Seand, A. Kohyama, P. Fenici, Recent advances in the development of SiC/SiC as a fusion structural material, Fusion Eng. Des. 41 (1998) 15–24.

DOI: 10.1016/s0920-3796(98)00285-3

[2] Yusheng Ding , Shaoming Dong , Zhengren Huang ,Dongliang Jiang, Fabrication of short C fiber-reinforced SiC composites by spark plasma sintering, Ceramics International. 33 (2007) 101-105.

DOI: 10.1016/j.ceramint.2005.08.004

[3] A. Hasegawa, A. Kohyama, R.H. Jones, L.L. Snead, P. Fenici, Critical issues and current status of SiC/SiC composites for fusion, J. Nucl. Mater. Vol.283–287 (2000) 128-137.

DOI: 10.1016/s0022-3115(00)00374-3

[4] L.-J. Zhou, Y. Huang, Z.-P. Xie, Y.-B. Cheng, Gas-discharging reactions and their effect on the microstructures of green bodies in gel-casting of non-oxide materials, Mater. Lett. 45 (2000) 51-57.

DOI: 10.1016/s0167-577x(00)00074-4

[5] D. Guo, L.-T. Li, Z.-L. Gui, C.-W. Nan, Anti-crack machining of PZT ceramics for fabricating piezocomposites by using gelcasting technique, Mater. Sci. Eng. 99 (2003) 25-28.

DOI: 10.1016/s0921-5107(02)00443-9

[6] Feiyu Yang , Xinghong Zhang, Jiecai Han, Shanyi Du, Processing and mechanical properties of short carbon fibers toughened zirconium diboride-based ceramics, Materials and Design 29 (2008) 1817-1820.

DOI: 10.1016/j.matdes.2008.03.011

[7] Song G.M., Wu Y., Li Q., Elevated temperature strength and thermal shockbehavior of hot-pressed carbon fiber reinforced TiC composites, J Eur. Ceram. Soc. 22 (2002) 559-566.

DOI: 10.1016/s0955-2219(01)00308-9

[8] S. Wang, Z.H. Chen, W.J. Ma, Q.S. Ma, Ceram. Int. 32 (2006) 291-295.

[9] G.B. Zheng, H. Sano, Uchiyama, Carbon 41 (2003) 853-856.