Add time:07/31/2019         Source:sciencedirect.com

Tensile specimens with three different gage dimensions were used to determine the tensile strength of a hot-pressed boron carbide. The strength-limiting flaw population and information on the fracture behavior under an applied tensile stress were also determined. The material follows traditional strength size-scaling for advanced ceramics, and flexure strength data for the same boron carbide was an excellent fit with the uniaxial tensile strength data. The strength-limiting flaw in all specimens was a carbon-based inclusion or agglomerate. The size of the fracture mirror around the origin and the fracture toughness value estimated from the measured strength-limiting flaw size are in excellent agreement with previously reported data. This information shows that standard four-point flexure strength tests can be used to confidently predict the uniaxial tensile strength of this hot-pressed boron carbide.

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