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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Ceramic Materials and Processing
Presentation Title Templated Growth of Metal Oxides in Montmorillonite-Modified SiOC Ceramics via Active Filler Pyrolysis
Author(s) Kathy Lu, Advaith Rau
On-Site Speaker (Planned) Kathy Lu
Abstract Scope This study investigates the templated in-situ growth of transition metal oxide nanoparticles in silicon oxycarbide (SiOC) matrices modified with amino-silane-functionalized montmorillonite (MMT) nanoclays. Iron(III) acetylacetonate was used as an active filler to catalyze phase evolution during pyrolysis at 1200°C and 1400°C. MMT domains act as nucleation sites that localize Fe species, forming core-shell FeOx@Fe₃Si particles embedded within the SiOC matrix. These regions support varied β-SiC nanowire growth through vapor-liquid-solid (VLS) and carbothermal mechanisms, modulated by temperature and filler distribution. Comparisons with Co, Ni, and Fe-based bimetallic systems (FeCo₀.₅, FeNi₀.₈) reveal that metal clustering on MMT enhances oxide formation and alters porosity and crystallization pathways. These hybrid nanocomposites exhibit tunable mesoporosity and graphitic carbon domains, making them promising candidates for porous ceramics, catalysis, and magnetic applications. The findings highlight the unique role of MMT as both structural template and chemical mediator in advanced ceramic design.
Proceedings Inclusion? Planned:
Keywords Ceramics, Process Technology, Characterization

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