Publication Details
Abstract
Background: Development of advanced ceramics composites would lead to the optimization of microstructural and mechanical properties of structural and engineering ceramics composites. The thermal and mechanical resistance of zirconia-mullite composites are well known, but additives of metal oxides can enhance their performance. In this study, effects of metal oxides, which include TiO₂, MgO, Fe₂O₃, and Al₂O₃, in the microstructure and mechanical properties of polymer-based zirconia-mullite composites synthesized through reaction sintering were investigated.
Objectives: The effect of various metal oxides on the leading material properties, such as grain size refinement, hardness, fracture toughness, and flexural strength in zirconia-mullite composites was considered in this investigation. In addition, it concerned the feasibility of reaction sintering as a processing route to enhance microstructural uniformity and overall composite performance.
Methodology: Three different types of metal oxides, namely TiO2, MgO, Fe2O3, and Al2O3, were compositionally added to the zirconia-mullite matrix. Samples were sintered by reaction sintering. The microstructural and mechanical properties were determined by a comprehensive characterization technique that included XRD, SEM, and pertinent mechanical testing. Statistical analysis will also be performed to observe if any observed changes in these properties occur statistically.
Results: This revealed metal oxide additives to considerably influence the microstructure as well as the mechanical performance of the composites. In contrast, TiO₂ and MgO intensified hardness and flexural strength while Fe₂O₃ increased fracture toughness. The microstructural analysis showed a refined grain size and effective homogeneity in the composites. Statistical analyses further confirmed considerable roles of metal oxides in optimizing the performance of the composites.
Conclusion and: Synthesis highlights the principal issue in creating composites and reveals that metal oxides added to zirconia-mullite composites together with reaction sintering promoted a considerable enhancement in mechanical properties. This study provides insight into the microstructural modification of ceramic material thus serving as a basis for high-performance composites advanced structural applications.
Specific Contribution: It uniquely adds to materials science as it pushes the understanding of how metal oxides affect the microstructure and mechanical behavior of polymer-based ceramic composites. The paper will conduct a comprehensive analysis of the experimental results supported by statistical validation on the basis that this clearly shows how influential the metal oxide additives are towards performance improvements in zirconia-mullite composite systems.