| Nanostructured Ceramic Bonding Phases in Graphene
Fortified Low Carbon MgO-C Refractory Bricks |
Goutam Ghosh,a,b,* K. Sarath Chandra,bAtanu Ranjan Pala
and Debasish Sarkarb
Pages : 151-157
DOI: 10.1080/0371750X.2026.2657393 |
| Abstract |
| A graphene-fortified, low-carbon MgO-C brick recipe assists in-situ formation of
ceramic bonding phases in the presence of Al, Si and B4C. Predominant multifaceted
-silicon carbide (-SiC) nanotubes (SiCNTs), along with thin silicon carbide whiskers
(SiCWs), magnesium aluminate (MgAl2O4
) spinel cuboids and aluminium borate
whiskers, form at 1600oC in a reducing environment. A competitive analysis of
conventional graphite-based MgO-C and developed low-carbon MgO-C ensures that
graphene facilitates nucleation, accelerates reaction kinetics and provides structured
laminae for selective growth of SiC nanostructures. Mechanistic pathways governing
the evolution of SiCNTs and SiCWs through interfacial reactions among carbon,
metallic additives and volatilized Si bearing species are elucidated. The findings
demonstrate that graphene not only enhances in situ ceramic bonding but also
promotes the formation of reinforcing nanostructures, thereby offering a viable
pathway to developing high performance, low carbon refractories suited for demanding
steel making applications. |
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