Effect of Additives and Carbon Resources on Thermal Shock Resistance of Spinel-C Material

Abstract:

Spinel-C material is important for monolithic stopper and submerged nozzle, which usually determine the application effects. Spinel-C specimens with 8% flake graphite is characterized by good corrosion resistance but poor thermal shock resistance. The effects of additives (Al-Si alloy, silicon powder, B₄C and SiC), flake graphite (+199/-199), ultrafine flake graphite, expanded graphite and nickel nitrate + pitch powder on thermal shock resistance of spinel-C material were investigated by using water-quenching method. The results show that: (1) The addition of Al-Si alloy and B₄C can significantly decrease the residual strength ratios (RSR) of the specimens. The addition of SiC and silicon powder can improve the RSR obviously. (2) The flake graphite of different particle sizes has little effect on the RSR of the specimens. With the increasing of the expanded graphite content, the RSR of the specimens increases. (3) The addition of mesophase pitch and Carboresâ P can receive the RSR rise of 74% and 59% respectively.

• Periodical: Key Engineering Materials (Volume 726)
• Pages: 440-444
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.726.440
• Online since: January 2017
• Authors: Zheng Wei, Guo Qi Liu*, Jin Song Yang
• Keywords: Additives, Carbon Resources, Thermal Shock Resistance, Water-Quenching

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