Characterization of Pressureless Sintered Boron Carbide

Report No. ARL-TR-6391
Authors: Joshua Pomerantz; Tomoko Sano
Date/Pages: March 2013; 18 pages
Abstract: This report outlines the characterization study of pressureless sintered boron carbide with graphite additive used as a sintering and densification aid on hexagonally shaped and plate-shaped samples of boron carbide. We conducted this investigation todetermine whether pressureless sintered boron carbide could be used as a substitute for the baseline hot-pressed boron carbide. The surfaces were characterized with a scanning electron microscope. The samples were tested for strength, hardness, density, and composition using four-point flexure testing, Knoop microindentation, Archimede's method, and x-ray spectroscopy, respectively. These values were then compared with literature values for pressureless sintered boron carbide and hot-pressed boron carbide. We concluded that the substitution was not feasible because of the high-porosity and low-strength values.
Distribution: Approved for public release
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Last Update / Reviewed: March 1, 2013