Formation and Sintering Mechanisms of Reaction Bonded Silicon Carbide-Boron Carbide Composites


Article Preview

Reaction sintering of boron carbide represents an attractive densification process. In this work, sintering mechanisms of silicon carbide and boron carbide composites were studied. Mixed boron carbide/graphite mixtures were sintered in a vacuumed graphite furnace between 1380 and 1450oC. The samples were in contact with bulk silicon metal which melts at 1410oC. Reaction sequence of the composition was investigated by X-ray diffraction, SEM and TEM. It was found that a reaction between molten silicon and B4C occurred and the reaction produced silicon carbide and silicon-containing boron carbide. Dense composites can be achieved by pressureless sintering at 1450oC and the final microstructure consists of silicon carbide, boron carbide, silicon-containing boron carbide and residual silicon at grain boundaries.



Edited by:

Katsutoshi Komeya, Yohtaro Matsuo and Takashi Goto




Z. F. Chen et al., "Formation and Sintering Mechanisms of Reaction Bonded Silicon Carbide-Boron Carbide Composites", Key Engineering Materials, Vol. 352, pp. 207-212, 2007

Online since:

August 2007




[1] P. Popper, The preparation of dense self-bonded silicon carbide. in Special Ceramics, 1960, p.209.

[2] Y. M Chiang, R. P. Messner and C. D. Terwilliger, Reaction-formed silicon carbide. Mater. Sci. Eng. A-Struct. Mater. Vol. A144(1991), pp.63-74.

[3] Suyama, S., Kameda, T. & Itoh, Y., Development of high-strength reaction-sintered silicon carbide, Diam. Relat. Mat., Vol. 12(2003), pp.1201-1204.

DOI: 10.1016/s0925-9635(03)00066-9

[4] M. K. Aghajanian, B. N. Morgan, J. R. Singh, J. Mears, and R. A Wolffe, A new family reaction bonded ceramics for armor applications, Transactions, Vol. 134 (2002), pp.527-539.

[5] A. L. Yurkov, A. M. Starchenko and B. S. Skidan, Reactive sintering of boron carbide, Ogneupory, Vol. 12(1989), pp.14-18.

[6] T. K. Roy, C. Subramanian and A. K. Suri, Pressureless sintering of boron carbide, Ceram. Int., Vol. 32(2005), pp.227-233.

[7] K. M. Taylor and R. J. Palicke, Dense arbide composite for armor and abrasives, U.S. patent 3765300, (1973).

[8] S. Hayun, N. Frage and M. P. Dariel, The morphology of ceramic phases in BxCSiC-Si infiltrated composites, J. Solid Chem. Vol. 179 (2006), pp.2875-2879.

DOI: 10.1016/j.jssc.2006.01.031

Fetching data from Crossref.
This may take some time to load.