Micromechanical and microstructure characterization of BaO-Sm2O3–5TiO2 ceramic with addition of Al2O3
Source abstract
Abstract
Abstract BaO-Sm2O3–5TiO2 (BST) added by Al2O3 was prepared by solid-state reaction method. The main phase is Ba3.99Sm9.34Ti18O54 of orthorhombic tungsten bronze structure, and the secondary phase is Ba1.18Al1.90Ti6.09O16 of tetragonal structure, which has two types of grains: one is grey and cubic, and the other is white and quasi-rectangular. Microstructure was characterized by XRD, SEM, and Raman spectra. Micromechanical properties of different phases were assessed by nanoindentation and micro-scratch tests with Berkovich indenter. Volume fractions of different phases obtained by statistical analysis of grid indentation are in good agreement with those obtained by XRD analysis. Vickers hardness method is more appropriate for the determination of the fracture toughness of dielectric ceramics. BST ceramic without addition of Al2O3 has better mechanical properties than BST-A with addition of Al2O3, indicating that addition of Al2O3 impairs the micromechanical properties of dielectric ceramics.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (100+)
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