The Effects of SiC Grain Size on SiC-Based Refractory Paints

Abstract:

Refractory paints based on silicon carbide were investigated with the alkali inorganic binders. In order to optimize the β-SiC granulometric distribution, different mixture of β-SiC along with metakaolin based geopolymers were used. The alkali activator was an aqueous solution NAOH/Na₂SiO₃. Metakaoline dissolved and reprecipitated in alkaline condition to form geopolymer which acts like a glue to stick un-reacted Al-Si and SiC. Paints were then cured and were exposed to 900°C for 8h. In the present study various proportions of two particle size of SiC were employed and, for providing geopolymers, NaOH/Na₂SiO₃ as an activator and metakaolin as a raw source material were used. They were applied on the low-carbon steel substrate then characterized and compared with a monomodal of SiC up to 900°C. Due to the analysis by increasing the proportion of Nano-SiC, macrocracks has been emerged.

• Periodical: Advanced Materials Research (Volume 685)
• Pages: 76-80
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.685.76
• Online since: April 2013
• Authors: Ayda Khosravanihaghighi, Mahmood Pakshir
• Keywords: Ceramic Coatings, Geopolymer, Refractory Paint, Silicon Carbide (SiC)

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