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- W2938001595 abstract "Abstract The effect of alumina addition on the pore filling process, crystallization behavior and mechanical properties of silica‐based ceramic cores was investigated. The sintered samples at 1250°C were treated at 1550°C for 0.5 hour in order to simulate a casting process condition. The microstructure analysis indicated that an appropriate alumina addition enhanced the pore filling process by supplying a substantial liquid viscous flow. With an increase in the liquid viscous flow, smaller pores were filled first, and larger pores were filled later. The results also indicated that the pore filling process could be enhanced by adding small powder additives to decrease the pore size between the particles in the ceramic material. However, an excessive alumina addition in the silica‐based ceramic cores had a negative effect on the flexural strength and leaching rate. As the alumina content increased from 8 to 12 wt%, the flexural strength of the ceramic core decreased from 16.37 to 4.60 MPa, respectively, and the leaching rate also decreased obviously. These results were explained by an acceleration in crystallization trend of the fused silica particle surface and the merging of connected pores in the sintered body." @default.
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- W2938001595 date "2019-04-23" @default.
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- W2938001595 title "Silica‐based ceramic core for aviation applications: Facile pore filling and flexural strength improvement" @default.
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- W2938001595 doi "https://doi.org/10.1111/ijac.13251" @default.
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