ドクターブレード法で作製したSiCウィスカー/Al2O3複合材料中のウィスカー配向

概要

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Whisker orientation of an sic-whisker/Al2O3 composite fabricated by doctor blade molding was investigated. The orientation of whiskers in a green sheet became higher with increase in viscosity and shear strain rate of slurry. Because, in the slurry, whiskers were rotated by the moment due to the distribution of viscous resistance which increase with viscosity and shear strain rate of slurry. Shrinkage of the thickness of a green sheet was also affected by whisker orientation. Hot-pressed body with the same degree of whisker orientation as that of green sheet could be fabricated. However, the orientation of whisker was lower than that in hot-pressed SiC-whisker/Al2O3 composite after extrusion molding with high squeeze ratio.
日本複合材料学会の論文