Fabrication of Porous SiC/SiAlON Composites Using Semi Coke and Fly Ash as Raw Material

Abstract:

Porous SiC/SiAlON ceramics were fabricated by carbothermal reduction method from raw materials of fly ash and semi coke in nitrogen atmosphere. The results showed that composites were composed by multi-structure of SiC, Ca-SiAlON and AlN phases. With the increase of semi coke contents, the contents of Ca-Sialon increased. The fracture mode of this material was intergranular. The results also showed that micro area hereditary of semi coke particles was observed in the morphology of this material. The morphology of this material was composed by nanosized SiC and plate like Ca-SiAlON. The median pore diameter was affected by the contents of semi coke and increased with the increase of semi coke content.

• Periodical: Materials Science Forum (Volume 724)
• Pages: 347-350
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.724.347
• Online since: June 2012
• Authors: Qing Wen Duan, Rong Zhen Liu, Hai Yun Jin, Jian Feng Yang, Zhi Hao Jin
• Keywords: Eco-Materials, Microstructure, Porous Ceramics

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