Progress in the Synthesis of Ternary Carbide by Carbothermal Reduction from Natural Raw Material

Abstract:

Aluminum-containing ternary carbide, Al4SiC4-Al4Si2C5 composites, were synthesized using a mixture of bauxite, kaolin and carbon black as starting materials. The effects of raw materials ratio on the phase transformation and micromorphology of ternary carbide were investigated. The results indicated that the optimum condition for synthesizing Al4SiC4-Al4Si2C5 composites was 2 h sintering at 1900 °C in flowing argon atmosphere. Al4Si2C5, Al, Si and SiC formed when carbon black content was lower than stoichiometric amount. With increasing of carbon black content, the Al and Si content decreased and Al4Si2C5 content increased in the products. Al4SiC4 appeared when stoichiometric amount of carbon black was used, and about 20 mol% excess of carbon black promoted the formation of Al4SiC4.

• Periodical: Advanced Materials Research (Volumes 881-883)
• Pages: 854-857
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.881-883.854
• Online since: January 2014
• Authors: Chao Yu, Hong Xi Zhu*, Wen Jie Yuan, Cheng Ji Deng, Shi Min Zhou
• Keywords: Al₄Si₂C₅, Al₄SiC₄, Natural Raw Material, Synthesis

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