Influence of Spinel on the Fracture Energy of Refractory Castable

Abstract:

The specific fracture energy of alumina-spinel refractory castables was studied by the wedge-splitting method in this paper. The influence of synthetic spinel on the specific fracture energy of aluminamagnesia refractory castables was investigated. In-situ formation spinel was replaced by sintering spinel as the synthetic spinel. The experimental results indicated that the specific fracture energy and the compressive flesural mechanical properties had the same changing trend with the increase of the synthetic spinel, but the thermal shock resistance of the materials showed the opposite trend. However, the thermal shock resistance was closely associated with the specific fracture energy according to one theory raised by Hasselman.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 632-635
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.632
• Online since: February 2013
• Authors: Hong Bin Qin, Hong Xia Li, Jian Dong Wang, Guo Qi Liu, Hai Xia Feng
• Keywords: Refractory Castables, Sintering Spinel, Specific Fracture Energy, Wedge Splitting

References

[1] H. Harmuth, K. Rieder, M. Krobath, E. Tschegg, Investigation of the nonlinear fracture behaviour of ordinary ceramic refractory materials, J. Mater. Sci. Eng. A. 214 (1996) 53–61.

DOI: 10.1016/0921-5093(96)10221-5

[2] S. Ribeiro, J.A. Rodrigues, The influence of microstructure on the maximum load and fracture energy of refractory castables. J. Ceram. Inter. 36 (2010) 263–274.

DOI: 10.1016/j.ceramint.2009.07.033

[3] S. Sumimura, T. Yamamura, Y. Cubata, T. Kanashige, Study on slag penetration of alumina-spinel castable, Proce. of UNITECRˇı93 Sao Paulo Brazil. (1993) 97–101.

[4] L.A. Diaz, R. Torrecillas, Effect of spinel content on slag attack resistance of high alumina refractory castables, J. Eur. ceram. Soc. 27 (2007) 4623-4631.

DOI: 10.1016/j.jeurceramsoc.2007.04.007

[5] I. Ohish, R. Ebizawa, Application of alumina–spinel castable refractoriesto steel ladle, In Proceedings of UNITECRˇı91 Congress. (1991) 101–107.

[6] M. Nakashima, T. Isobe, S. Itose, et al., Improving the Corrosion Resistance of Alumina-Spinel Castable by Adding Ultrafine Spinel, In Taikabutsu Overseas Abstracts of the 10th Annual Colloquium of TARJ. 17 (1997) 96.

[7] J. Mori, M. Onove, Y. Toritani, et al., Structure change of alumina castable by addition of magnesia or spinel, Taikabutsu Overseas. 15 (1995) 20–23.

[8] Y.C. Ko, C.F. Chan, Effect of spinel content on hot strength of aluminas-pinel castables in the temperature range 1000–1500 ℃, J. Eur. Ceram. Soc. 19 (1999) 2633–2639.

DOI: 10.1016/s0955-2219(99)00042-4

[9] C.F. Chan, Y.C. Ko, Effect of CaO content on the hot strength of alumina-spinel castables in the temperature range 1000–1500 ℃, J. Am. Ceram. Soc. 81 (1998) 2957–2960.

DOI: 10.1111/j.1151-2916.1998.tb02719.x

[10] Y. Sato, H. Joguchi, N. Hiroki, Test results of alumina-spinel castables for steel ladle, Taikabutsu Overseas 12 (1992) 10–14.

[11] Y.C. Ko, Influence of the characteristics of spinels on the slag resistance of Al2O3-MgO and Al2O3-spinel castables, J. Am. Ceram. Soc. 83 (2000) 2333–2335.

DOI: 10.1111/j.1151-2916.2000.tb01559.x

[12] B. Alapin, M. Ollig, J. Po¨tschke, Thermomechanical properties of selected refractory materials, in Proceedings of 46th Inter Coll Refr Eurogress Aachen Germany. (2003) 107–112.

[13] S. Ribeiro, J.S.C. Vieira, C.C.D. Exposito, et al,. in: Proceedings 10th Unified International Technical Conference on Refractories (UNITECR), Dresden Alemanha. (2007). 498–502.

[14] J.H. Ainsworth, R.H. Herron, High temperature fracture energy of refractories, Ceram. Bull. 55 (1976) 655-664.

[15] D.P.H. Hasselman, Unified theory of thermal shock fracture initiation and crack propagation in brittle ceramics, J. Am. Ceram. Soc. 52 (1969) 600-604.

DOI: 10.1111/j.1151-2916.1969.tb15848.x

[16] H. Harmuth, R.C. Bradt, Investigation of refractory brittleness by fracture mechanical and fractographic methods, Refract. Manual. (2010) 6-10.