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Spark Plasma Sintering of B4C and B4C-TiB2 Composites: Deformation and Failure Mechanisms under Quasistatic and Dynamic Loading

This publication relates to work that QCML performed with collaborators at University of North Texas and deals with advanced ceramic materials.  In this work powders of both pure boron carbide and composites of boron carbide and titanium diboride  were consolidated using spark plasma sintering.   Theoretical densities over 99% were achieved.  The 23%vol TiB2-B4C composites exhibited increased hardness, fracture toughness, and flexural strength compared to the pure B4C samples.  The presence of TiB2 facilitates crack deflection at phase interfaces, increasing the amount of intergranular fracture, and thus enhances mechanical properties of the material.  The results of this research show potential to increase the effectiveness of lightweight ceramic armor through use of TiB2-B4C composites.

Spark Plasma Sintering Process

S. Rubink, V. Ageh, H. Lide, N.A. Ley, M.L. Young, D.T. Casem, E.J. Faierson, T.W. Scharf, “Spark Plasma Sintering of B4C and B4C-TiB2 Composites: Deformation and Failure Mechanisms under Quasistatic and Dynamic Loading,” Journal of the European Ceramic Society, January 2021.

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