An improved split-cell apparatus for the measurement of tensile strength of powders

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Abstract
Measurement of the tensile strength of powder compacts is useful for determining the magnitude of the cohesive forces which cause powders to agglomerate. A split-cell apparatus has been developed which contains major improvements on previous devices, including separation of the split-cell from the base unit to allow higher packing densities. A piezoelectrically controlled translation device provides a means of vibration-free, variable speed application of the tensile load. A compact DC operated force transducer is used to measure the tensile load to an accuracy better than 0.1%. Several other design and procedural improvements also make the present method simpler and more efficient. Typical plots of tensile stress against time and tensile strength against packing density are shown for carbon black.

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