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Property anisotropy can exist in sintered ceramics and composites formed by pressure-assistance. Being that hot-pressed silicon carbide (SiC) is a utilized armor ceramic, and its fracture and damage multiaxially occurs in a ballistic impact, interest exists to measure the quasi-static mechanical (fracture and indentation) responses as a function of orientation to identify anisotropy. Flexure strength, fracture toughness, Knoop hardness, and spherical indentation were studied as a function of orientation with respect to the pressing axis in a 40-mm-thick hotpressed SiC tile. Flexure strength and fracture toughness were ~ 25% and 10% lower, respectively, in the plane perpendicular to the pressing axis while hardness was isotropic and the responses from spherical indentation were different but inconclusive.

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