The Influence of B₄C on Mechanical Properties of MgO-SiC Based Refractory Castables

Abstract:

The effects of B₄C addition on the room temperature physical properties and hot mechanical properties of MgO-SiC based refractory castables were investigated using magnesia and SiC fines as starting materials and silica fume as a binder. The microstructure was characterized by scanning electron microscopy (SEM). The results showed that drying strength of MgO-SiC based castables decreased with the increase in B4C addition, the immediate temperature strength and hot temperature strength increased. The HMOR at 1400°C for 0.5h decreased. This is because B4C oxidized and produced a liquid phase during heating, contributing to sintering and making the material denser. So the cold strength increased. On the other hand, due to the formation of liquids, direct binding reduced and the HMOR decreased

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2397-2401
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2397
• Online since: January 2013
• Authors: Jun Cong Wei, Jing Wang, Jun Bo Tu
• Keywords: B₄C, Castable, Magnesia, Mechanical Property, Silicon Carbide (SiC)

References

[1] S. H. Zhang, Z.Y. Bi, N.S. Zhou, etc. Refractories Vol. 33(3) (1999), pp.150-153(in Chinese).

[2] Z. G. Li, F.B. Ye, X. C. Zhong. Refractories Vol. 35(6) (2001), pp.320-322 (in Chinese).

[3] Z. Y. Bi, N. S. Zhou, X.C. Zhong. Refractories Vol. 33(1) (1999), pp.12-15(in Chinese).

[4] Y. S. Li, N. Li, Y.D. Wang. Refractories Vol. 36(2) (2002), pp.86-87(in Chinese).

[5] J.B. Tu, J.C. Wei, B. Cui. B. C. Cera. Soc. Vol. 28(6) (2009) (in Chinese).