Mechanical Properties and Crystallization Behavior of Silica-Based Ceramic Cores with Different Particle Morphologies
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Herein, we investigate the influence of silica particle morphology on the mechanical properties and crystallization of ceramiccores, showing that the above factor influences the mixing, flow, and sintering (1200 oC, 12 h) behavior of feedstock. Ceramiccores were fabricated using angular and spherical silica particles, and their performance was evaluated by feedstock viscosity,flexural strength, shrinkage, apparent porosity, X-ray diffraction, and scanning electron microscopy analyses. The aboveanalyses revealed that cristobalite was readily formed on spherical particles, and the corresponding core exhibited lowerviscosity, improved flexural strength (1.7-fold) and reduced shrinkage (by as much as 15%) compared to those of the corecomprising angular particles.
Abstract
Herein, we investigate the influence of silica particle morphology on the mechanical properties and crystallization of ceramiccores, showing that the above factor influences the mixing, flow, and sintering (1200 oC, 12 h) behavior of feedstock. Ceramiccores were fabricated using angular and spherical silica particles, and their performance was evaluated by feedstock viscosity,flexural strength, shrinkage, apparent porosity, X-ray diffraction, and scanning electron microscopy analyses. The aboveanalyses revealed that cristobalite was readily formed on spherical particles, and the corresponding core exhibited lowerviscosity, improved flexural strength (1.7-fold) and reduced shrinkage (by as much as 15%) compared to those of the corecomprising angular particles.
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