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SiC fines effects on the microstructure and properties of bauxite-based low-cement refractory castables

Mavahebi, S ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2019.05.161
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. In the present paper, the effect of silicon carbide (SiC) fines was studied on the phase and microstructural properties of bauxite-based low-cement refractory castables (LCC) at different firing temperatures. XRD and SEM techniques were employed to evaluate phase and microstructure analysis, and physical/mechanical properties were measured according to standard methods. The results showed that the oxidation of SiC particles related to the oxygen partial pressure and active/passive oxidation behavior of SiC fines could markedly affect the microstructure and properties of bauxite-based LCC fired at high temperatures. Despite the negative influence of addition of SiC fines on cold mechanical strength, its usage up to 6 wt% could greatly improve the thermo-mechanical properties of LCC refractories due to increasing of matrix refractoriness. © 2019 Elsevier Ltd and Techna Group S.r.l
  6. Keywords:
  7. Mechanical properties ; Microstructure ; Refractories ; SiC ; Cements ; Refractory materials ; Bauxite-based LCC ; Cold mechanical strengths ; Micro-structural properties ; Microstructure and properties ; Oxygen partial pressure ; Phase and microstructures ; Silicon carbides (SiC) ; Thermomechanical properties ; Silicon carbide
  8. Source: Ceramics International ; Volume 45, Issue 13 , 2019 , Pages 16338-16346 ; 02728842 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S027288421931274X